├── .gitattributes ├── Battery-Voltage-Measure.brd ├── Battery-Voltage-Measure.sch ├── README.md └── pictures ├── Battery-Voltage-Measure-bot.png ├── Battery-Voltage-Measure-sch.png ├── Battery-Voltage-Measure-top.png └── Battery-Voltage-Measure-zoom-sch.png /.gitattributes: -------------------------------------------------------------------------------- 1 | # Auto detect text files and perform LF normalization 2 | * text=auto 3 | 4 | # Custom for Visual Studio 5 | *.cs diff=csharp 6 | 7 | # Standard to msysgit 8 | *.doc diff=astextplain 9 | *.DOC diff=astextplain 10 | *.docx diff=astextplain 11 | *.DOCX diff=astextplain 12 | *.dot diff=astextplain 13 | *.DOT diff=astextplain 14 | *.pdf diff=astextplain 15 | *.PDF diff=astextplain 16 | *.rtf diff=astextplain 17 | *.RTF diff=astextplain 18 | -------------------------------------------------------------------------------- /Battery-Voltage-Measure.sch: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 | 91 | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | 100 | 101 | 102 | 103 | 104 | 105 | 106 | 107 | 108 | 109 | 110 | 111 | 112 | 113 | 114 | 115 | 116 | 117 | 118 | 119 | 120 | 121 | 122 | 123 | 124 | 125 | 126 | 127 | 128 | 129 | 130 | 131 | 132 | 133 | 134 | 135 | 136 | 137 | 138 | 139 | 140 | 141 | 142 | 143 | 144 | 145 | 146 | 147 | 148 | 149 | 150 | 151 | 152 | 153 | 154 | 155 | 156 | 157 | 158 | 159 | 160 | 161 | 162 | 163 | 164 | 165 | 166 | 167 | 168 | 169 | 170 | 171 | 172 | 173 | 174 | 175 | 176 | 177 | 178 | 179 | 180 | 181 | 182 | 183 | 184 | 185 | 186 | 187 | <h2>microBuilder.eu Eagle Footprint Library</h2> 188 | 189 | Footprints for common components used in our projects and products. This is the same library that we use internally, and it is regularly updated. The newest version can always be found at www.microBuilder.eu. If you find this library useful, please feel free to purchase something from our online store. Please also note that all holes are optimised for metric drill bits! 190 | 191 | <h3>Obligatory Warning</h3> 192 | While it probably goes without saying, there are no guarantees that the footprints or schematic symbols in this library are flawless, and we make no promises of fitness for production, prototyping or any other purpose. These libraries are provided for information puposes only, and are used at your own discretion. While we make every effort to produce accurate footprints, and many of the items found in this library have be proven in production, we can't make any promises of suitability for a specific purpose. If you do find any errors, though, please feel free to contact us at www.microbuilder.eu to let us know about it so that we can update the library accordingly! 193 | 194 | <h3>Revision History</h3> 195 | 196 | <table width="100%" bgcolor="#EEE"> 197 | <tr bgcolor="#CCC"> 198 | <td width="60"> 199 | Version 200 | </td> 201 | <td width="100"> 202 | Release Date 203 | </td> 204 | <td> 205 | Changes 206 | </td> 207 | </tr> 208 | <tr> 209 | <td>1.07</td> 210 | <td>9 August 2011</td> 211 | <td> 212 | Parts Added: 213 | <ul> 214 | <li>2N7002PS - Dual N-Channel MOSFET (SOT363)</li> 215 | <li>24AA256 - 256K (32K x 8) I2C EEPROM</li> 216 | <li>74HC4050D - 6-channel level shifter</li> 217 | <li>74LCX245MTC - 8-bit 5.0-3.3V level shifter</li> 218 | <li>93LC46B - 1K 16-Bit EEPROM (for FT2232H)</li> 219 | <li>A4983 - Stepper Motor Driver</li> 220 | <li>AD7780 - 24-Bit Sigma-Delta ADC with 128x PGA</li> 221 | <li>ADP3303 - High Accuracy 200 mA LDO</li> 222 | <li>ADXL345 - Digital Accelerometer</li> 223 | <li>ANT-868-SP - 868MHz SMT Antenna</li> 224 | <li>BMP085 - Digital Pressue Sensor</li> 225 | <li>FT2232H - Dual High-Speed USB to UART (LQFP64)</li> 226 | <li>ILI9481_LCD - 320x480 LCD</li> 227 | <li>ISL12022M - Temp Comp. RTC</li> 228 | <li>HMC5883L - Digital 3-Axis Compass</li> 229 | <li>ITG-3200 - Digital 3-Axis Gyroscope</li> 230 | <li>L3G2400D - 3-Axis I²C/SPI Gyroscope</li> 231 | <li>LAN8720 - 10/100 Ethernet PHY (QFN-24)</li> 232 | <li>LM4811 - Headphone Amplifier</li> 233 | <li>LOADCELL - Connectors for 4-wire load cells</li> 234 | <li>LPC1227/6/5/4 - Cortex M0 MCU</li> 235 | <li>LTC3581 - 3.3A Boost/Inverting DC/DC</li> 236 | <li>M25P16 - 16MBit Serial Flash (SPI)</li> 237 | <li>MAX3421E - USB Device/Host Controller</li> 238 | <li>MCP6022 - Dual 10MHz Op-Amp (SOIC8)</li> 239 | <li>MCP73871 - LIPO Battery Charger</li> 240 | <li>OL2381 - 315/434/868/915 MHz Transceiver</li> 241 | <li>PCF2129A - High Accuracy RTC w/Integrated Crystal</li> 242 | <li>SN74AUP - Tri-State Buffer</li> 243 | <li>SPX29302 - 3A 1% Adjustable LDO Regulator (TO263)</li> 244 | <li>STEREOJACK - 3.5mm Headphone Jack (Courtesy Adafruit)</li> 245 | <li>TPS61029 - Boost Converter/li> 246 | <li>TXS0102 - 2-Bit bi-directional level shifter (I2C)</li> 247 | <li>TXB0104PWR - 4-Bit bi-directional level shifter</li> 248 | <li>TXB0108PWR - 8-Bit bi-directional level shifter</li> 249 | <li>UPD5713TK - 50MHz-2.5GHz SPDT Switch</li> 250 | <li>VCNL4000 - Digital Proximity and Light Sensor</li> 251 | </ul> 252 | Parts Updated: 253 | <ul> 254 | <li>LPC1754 - Removed 1756+ pin labels (ENET+I2S)</li> 255 | <li>JST_2PIN - Added SH-type connector as well</li> 256 | <li>LED_RGB_PLCC6 - Changed to CREE CLV61-FKB</li> 257 | <li>TSL2561 - Added DFN footprint (CS obsolete)</li> 258 | </ul> 259 | 260 | </td> 261 | </tr> 262 | <tr> 263 | <td>1.06</td> 264 | <td>10 August 2010</td> 265 | <td> 266 | Parts Added: 267 | <ul> 268 | <li>ADM1191 - I2C Digital Power Monitor</li> 269 | <li>ADT7410 - 13-bit +/-0.5°C I2C Temp. Sensor</li> 270 | <li>DP83848 - 10/100 Ethernet Transceiver (40-LLP)</li> 271 | <li>ILI9325 - 2.8" TFT LCD w/Touch Screen</li> 272 | <li>LM358 - SOIC8 OP-AMP</li> 273 | <li>LM2671 - 500mA Switching Step-Down Voltage Regulator</li> 274 | <li>LPC1768 - 100MHz Cortex M3, 512KB Flash/64KB SRAM</li> 275 | <li>LPC313x/314x - ARM926EJ-S MCUs (TFBGA180)</li> 276 | <li>LTC3554 - USB Lipo Charger w/Dual Step-Down</li> 277 | <li>MBED - MBED footprint and pinout</li> 278 | <li>MIC5387 - 3 Output 150mA LDO</li> 279 | <li>MICROSD - uSD/Transflash Connector</li> 280 | <li>MOSFET-P - P-Channel MOSFET</li> 281 | <li>MT48H32M16LF - 512Mb Low-Power SDRAM (VFBGA54)</li> 282 | <li>OSCILLATOR - 5x7mm SMT Oscillator</li> 283 | <li>S1D13743 - TFT LCD Controller with 464K SRAM</li> 284 | <li>VREG_SOT23-5 - Single Part for SOT23-5 Linear Regulators</li> 285 | </ul> 286 | Parts Updated: 287 | <ul> 288 | <li>DCBarrel: Fixed reversed GND/GNDBreak pins on SMT version</li> 289 | </ul> 290 | 291 | </td> 292 | </tr> 293 | <tr> 294 | <td>1.05</td> 295 | <td>24 April, 2010</td> 296 | <td> 297 | Parts Added: 298 | <ul> 299 | <li>AT25040A - Atmel 1K/4K SPI EEPROM (SOIC8 and TSSOP8)</li> 300 | <li>BRIDGERECTIFIER - Comchip C4S-G 400V 800mA Peak 1.1V Vf</li> 301 | <li>DIODE-ZENER - Zener Diode</li> 302 | <li>FTDIUSBCABLE - Connector for FTDI's TTL-232R USB/RS232 Cable</li> 303 | <li>LED_RGB_PLCC4 - PLCC4 RGB LED (Common Anode)</li> 304 | <li>LPC1113/4_QFN - LPC1113/LPC1114 in QFN33</li> 305 | <li>LD39015xx - Ultra low dropout 150mA voltage regulator</li> 306 | <li>MCP24AA32 - Microchip 32K 1.8V I2C EEPROM (SOT23-5)</li> 307 | <li>PN532 - 13.56MHz contactless communication transceiver</li> 308 | <li>TRANSISTOR_NPN - 500mA 45V NPN Transistor (BC817)</li> 309 | </ul> 310 | 311 | </td> 312 | </tr> 313 | <tr> 314 | <td>1.04</td> 315 | <td>14 January, 2010</td> 316 | <td> 317 | Parts Added: 318 | <ul> 319 | <li>ANTENNA868MHZ - 868MHz SMT/Chip Antenna</li> 320 | <li>AT86RF212 - 700/800/900 MHz Transceiver</li> 321 | <li>BALUN - 800-1000 MHz (1206)</li> 322 | <li>BALUN+LP - 863-928 MHz Balun with Built-In LP Filter (0805)</li> 323 | <li>LOWPASSFILTER - 869MHz RF Low Pass Filter (0603)</li> 324 | <li>SMACONNECTOR - 90° DIP SMA Connector</li> 325 | </ul> 326 | 327 | </td> 328 | </tr> 329 | <tr> 330 | <td>1.03</td> 331 | <td>15 December 2009</td> 332 | <td> 333 | Parts Added: 334 | <ul> 335 | <li>BUTTON_SMT - 4-Pin soft-touch SMT button</li> 336 | <li>DIODE - Add SOD-323, SOD-523 Footprints</li> 337 | <li>FERRITE - 120 0hm, 600mA Ferrite Chip</li> 338 | <li>PSP_LCDOUTLINE - Dimensional Drawing for Sharp LQ043 LCD</li> 339 | <li>RJ45 - Ethernet Connector with LEDs and internal transformer</li> 340 | </ul> 341 | Parts Updated: 342 | <ul> 343 | <li>DCBARREL - SMT version updated to improve manufacturability (added tRestrict polygons)</li> 344 | <li>JTAG-CORTEXM3 - Footprints updated to correspond to real physical dimensions</li> 345 | </ul> 346 | 347 | </td> 348 | </tr> 349 | <tr> 350 | <td>1.02</td> 351 | <td>26 November 2009</td> 352 | <td> 353 | Parts Added: 354 | <ul> 355 | <li>BAT54C - 200mA 30V Dual Schottky Diode (Common Cathode) </li> 356 | <li>HEADER-1x20 - 1x20 2.54mm/0.1" Header Pins</li> 357 | <li>LPC2478 - 72MHz ARM7 MCU (QFP208 Package)</li> 358 | <li>LPC1113/4 - 50MHz Cortex M0 MCU (QFP48 Package)</li> 359 | <li>MAX1698 - Step-Up Current Regulator for LED Backlights</li> 360 | <li>MT48LC4M16A2P - Micron 64MB SDRAM (4Mb x 16)</li> 361 | <li>PTC - 100ma, 250ma and 750mA PTCs</li> 362 | </ul> 363 | 364 | </td> 365 | </tr> 366 | <tr> 367 | <td>1.01</td> 368 | <td>14 November 2009</td> 369 | <td> 370 | Parts Added: 371 | <ul> 372 | <li>NCP1400A - 100mA PWM Step-Up Regulator (3.3V and 5.0V SOT23-5)</li> 373 | <li>MIC5320 - Dual 150mA ULDO Linear Regulator</li> 374 | <li>INDUCTOR - 10µH, 22µH and 47µH 1007 Inductors</li> 375 | </ul> 376 | 377 | </td> 378 | </tr> 379 | <tr> 380 | <td>1.00</td> 381 | <td>12 November 2009</td> 382 | <td>Initial Release</td> 383 | </tr> 384 | </table> 385 | 386 | 387 | <h3>License</h3> 388 | This work is placed in the public domain, and may be freely used for commercial and non-commercial work with the following conditions: 389 | THIS SOFTWARE IS PROVIDED ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 390 | 391 | 392 | 393 | PIN HEADER 394 | 395 | 396 | 397 | 398 | 399 | >NAME 400 | >VALUE 401 | 402 | 403 | 404 | 405 | 406 | 407 | 408 | 409 | 410 | 411 | 412 | >NAME 413 | >VALUE 414 | 415 | 416 | 417 | 418 | 419 | 420 | Pin Headers 421 | 4 Pin, 0.1"/2.54mm pitch, SMT 422 | 423 | 424 | 425 | 426 | 427 | >NAME 428 | >VALUE 429 | 430 | 431 | 432 | 433 | 434 | 435 | 436 | >NAME 437 | >VALUE 438 | 439 | 440 | 441 | 442 | 443 | 444 | 445 | >NAME 446 | >VALUE 447 | 448 | 449 | 450 | 451 | 452 | 453 | 454 | 455 | 456 | >VALUE 457 | 458 | 459 | 460 | 461 | 462 | >VALUE 463 | 464 | 465 | 466 | 467 | 468 | 469 | 470 | >NAME 471 | >VALUE 472 | 473 | 474 | 475 | 476 | 477 | 478 | 479 | 480 | GND 481 | 482 | 483 | 484 | 485 | 486 | 487 | 488 | 489 | 490 | 491 | 492 | 493 | VDD Supply Symbol 494 | 495 | 496 | 497 | 498 | 499 | 500 | 501 | 502 | 503 | 504 | 505 | 506 | PIN HEADER 507 | 508 | 509 | 510 | 511 | 512 | 513 | 514 | 515 | 516 | 517 | 518 | 519 | 520 | 521 | 522 | 523 | 524 | 525 | 526 | 527 | 528 | 529 | 530 | 531 | 532 | 533 | 534 | 535 | 536 | 537 | 538 | 539 | 540 | 541 | 542 | 543 | 544 | 545 | 546 | 547 | 548 | 549 | 550 | 551 | 552 | 553 | 554 | 555 | 556 | 557 | 558 | 559 | 560 | 561 | 562 | 563 | 564 | 565 | 566 | 567 | 568 | 569 | 570 | 571 | 572 | 573 | 574 | 575 | 576 | 577 | RESISTOR 578 | SMD 579 | 580 | 581 | 582 | 583 | 584 | 585 | 586 | 587 | 588 | 589 | 590 | 591 | >NAME 592 | >VALUE 593 | 594 | 595 | 596 | 597 | 598 | 599 | 600 | 601 | 602 | 603 | 604 | 605 | 606 | 607 | >NAME 608 | >VALUE 609 | 610 | 611 | 612 | 613 | 614 | >NAME 615 | >VALUE 616 | 617 | 618 | 619 | 620 | 621 | 622 | 623 | 624 | 625 | 626 | >NAME 627 | >VALUE 628 | 629 | 630 | 631 | 632 | 633 | 634 | 635 | 636 | 637 | 638 | 639 | 640 | 641 | 642 | 643 | >NAME 644 | >VALUE 645 | 646 | 647 | RESISTOR 648 | chip 649 | 650 | 651 | 652 | 653 | 654 | 655 | 656 | 657 | 658 | 659 | 660 | 661 | >NAME 662 | >VALUE 663 | 664 | 665 | 666 | 667 | 668 | 669 | 670 | 671 | >NAME 672 | >VALUE 673 | 674 | 675 | 676 | 677 | 678 | 679 | 680 | 681 | 682 | 683 | 684 | 685 | >Name 686 | >Value 687 | 688 | 689 | <h3>AXIAL-0.3-KIT</h3> 690 | 691 | Commonly used for 1/4W through-hole resistors. 0.3" pitch between holes. 692 | 693 | 694 | Warning: This is the KIT version of the AXIAL-0.3 package. This package has a smaller diameter top stop mask, which doesn't cover the diameter of the pad. This means only the bottom side of the pads' copper will be exposed. You'll only be able to solder to the bottom side. 695 | 696 | 697 | 698 | 699 | 700 | 701 | 702 | 703 | 704 | 705 | >Name 706 | >Value 707 | 708 | 709 | 710 | 711 | 712 | 713 | 714 | 715 | 716 | 717 | 718 | 719 | 720 | 721 | 722 | 723 | 724 | 725 | 726 | 727 | 728 | 729 | 730 | 731 | 732 | 733 | 1/2W Resistor, 0.5" wide 734 | 735 | Yageo CFR series <a href="http://www.yageo.com/pdf/yageo/Leaded-R_CFR_2008.pdf">http://www.yageo.com/pdf/yageo/Leaded-R_CFR_2008.pdf</a> 736 | 737 | 738 | 739 | 740 | 741 | 742 | >Name 743 | >Value 744 | 745 | 746 | 1/4W Resistor, 0.4" wide 747 | 748 | Yageo CFR series <a href="http://www.yageo.com/pdf/yageo/Leaded-R_CFR_2008.pdf">http://www.yageo.com/pdf/yageo/Leaded-R_CFR_2008.pdf</a> 749 | 750 | 751 | 752 | 753 | 754 | 755 | >Name 756 | >Value 757 | 758 | 759 | 1/6W Thru-hole Resistor - *UNPROVEN* 760 | 761 | 762 | 763 | 764 | 765 | 766 | >NAME 767 | >VALUE 768 | 769 | 770 | 1W Resistor, 0.6" wide 771 | 772 | Yageo CFR series <a href="http://www.yageo.com/pdf/yageo/Leaded-R_CFR_2008.pdf">http://www.yageo.com/pdf/yageo/Leaded-R_CFR_2008.pdf</a> 773 | 774 | 775 | 776 | 777 | 778 | 779 | >Name 780 | >Value 781 | 782 | 783 | 2W Resistor, 0.8" wide 784 | 785 | Yageo CFR series <a href="http://www.yageo.com/pdf/yageo/Leaded-R_CFR_2008.pdf">http://www.yageo.com/pdf/yageo/Leaded-R_CFR_2008.pdf</a> 786 | 787 | 788 | 789 | 790 | 791 | 792 | >Name 793 | >Value 794 | 795 | 796 | 797 | 798 | 799 | 800 | 801 | 802 | >NAME 803 | >VALUE 804 | 805 | 806 | 807 | 808 | 809 | 810 | 811 | 812 | 813 | 814 | 815 | 816 | 817 | >NAME 818 | >VALUE 819 | 820 | 821 | 822 | 823 | 824 | 825 | 826 | 827 | CAPACITOR 828 | SMD 829 | 830 | 831 | 832 | 833 | 834 | 835 | 836 | 837 | 838 | 839 | 840 | 841 | 842 | >NAME 843 | >VALUE 844 | 845 | 846 | 847 | 848 | 849 | 850 | 851 | 852 | 853 | 854 | 855 | 856 | 857 | 858 | 859 | >NAME 860 | >VALUE 861 | 862 | 863 | 864 | 865 | 866 | 867 | 868 | 869 | >NAME 870 | >VALUE 871 | 872 | 873 | 874 | 875 | 876 | 877 | 878 | 879 | 880 | 881 | 882 | >NAME 883 | >VALUE 884 | 885 | 886 | 887 | 888 | 889 | 890 | 891 | 892 | 893 | 894 | >NAME 895 | >VALUE 896 | 897 | 898 | CTZ3 Series land pattern for variable capacitor - CTZ3E-50C-W1-PF 899 | 900 | 901 | 902 | 903 | 904 | 905 | 906 | 907 | 908 | 909 | 910 | 911 | 912 | 913 | 914 | 915 | 916 | >NAME 917 | >VALUE 918 | 919 | 920 | <h3>CAP-PTH-SMALL-KIT</h3> 921 | Commonly used for small ceramic capacitors. Like our 0.1uF (http://www.sparkfun.com/products/8375) or 22pF caps (http://www.sparkfun.com/products/8571). 922 | 923 | Warning: This is the KIT version of this package. This package has a smaller diameter top stop mask, which doesn't cover the diameter of the pad. This means only the bottom side of the pads' copper will be exposed. You'll only be able to solder to the bottom side. 924 | 925 | 926 | 927 | 928 | 929 | 930 | 931 | 932 | 933 | 934 | 935 | 936 | 937 | 938 | 939 | 940 | 941 | 942 | 943 | 944 | 945 | 946 | 947 | 948 | 949 | 950 | 951 | 952 | 953 | 954 | 955 | 956 | 957 | 958 | 959 | 960 | >Name 961 | >Value 962 | 963 | 964 | 965 | 966 | 967 | >Name 968 | >Value 969 | 970 | 971 | 972 | 973 | 974 | 975 | 976 | 977 | 978 | >Name 979 | >Value 980 | 981 | 982 | 983 | 984 | 985 | 986 | 987 | 988 | >Name 989 | >Value 990 | 991 | 992 | 993 | 994 | 995 | 996 | 997 | 998 | 999 | 1000 | 1001 | 1002 | 1003 | 1004 | 1005 | 1006 | 1007 | 1008 | >NAME 1009 | >VALUE 1010 | 1011 | 1012 | 1013 | 1014 | 1015 | 1016 | 1017 | 1018 | 1019 | 1020 | 1021 | 1022 | >Name 1023 | >Value 1024 | 1025 | 1026 | 1027 | 1028 | 1029 | 1030 | 1031 | 1032 | 1033 | 1034 | 1035 | 1036 | 1037 | >NAME 1038 | >VALUE 1039 | 1040 | 1041 | 1042 | 1043 | 1044 | 1045 | 1046 | 1047 | 1048 | 1049 | 1050 | 1051 | 1052 | 1053 | 1054 | 1055 | 1056 | 1057 | 1058 | >NAME 1059 | >VALUE 1060 | 1061 | 1062 | 1063 | 1064 | 1065 | 1066 | 1067 | 1068 | >NAME 1069 | >VALUE 1070 | 1071 | 1072 | 1073 | 1074 | Resistor 1075 | Basic schematic elements and footprints for 0603, 1206, and PTH resistors. 1076 | 1077 | 1078 | 1079 | 1080 | 1081 | 1082 | 1083 | 1084 | 1085 | 1086 | 1087 | 1088 | 1089 | 1090 | 1091 | 1092 | 1093 | 1094 | 1095 | 1096 | 1097 | 1098 | 1099 | 1100 | 1101 | 1102 | 1103 | 1104 | 1105 | 1106 | 1107 | 1108 | 1109 | 1110 | 1111 | 1112 | 1113 | 1114 | 1115 | 1116 | 1117 | 1118 | 1119 | 1120 | 1121 | 1122 | 1123 | 1124 | 1125 | 1126 | 1127 | 1128 | 1129 | 1130 | 1131 | 1132 | 1133 | 1134 | 1135 | 1136 | 1137 | 1138 | 1139 | 1140 | 1141 | 1142 | 1143 | 1144 | 1145 | 1146 | 1147 | 1148 | 1149 | 1150 | 1151 | 1152 | 1153 | 1154 | 1155 | 1156 | 1157 | 1158 | 1159 | 1160 | 1161 | 1162 | 1163 | 1164 | 1165 | 1166 | 1167 | 1168 | 1169 | 1170 | 1171 | 1172 | 1173 | 1174 | 1175 | 1176 | 1177 | 1178 | 1179 | 1180 | 1181 | 1182 | 1183 | 1184 | 1185 | 1186 | 1187 | 1188 | 1189 | 1190 | 1191 | 1192 | 1193 | 1194 | 1195 | 1196 | 1197 | 1198 | 1199 | 1200 | 1201 | 1202 | 1203 | 1204 | 1205 | 1206 | 1207 | 1208 | 1209 | 1210 | 1211 | 1212 | 1213 | 1214 | 1215 | 1216 | 1217 | 1218 | 1219 | 1220 | 1221 | 1222 | 1223 | 1224 | 1225 | 1226 | 1227 | 1228 | 1229 | 1230 | 1231 | 1232 | 1233 | 1234 | 1235 | 1236 | Capacitor 1237 | Standard 0603 ceramic capacitor, and 0.1" leaded capacitor. 1238 | 1239 | 1240 | 1241 | 1242 | 1243 | 1244 | 1245 | 1246 | 1247 | 1248 | 1249 | 1250 | 1251 | 1252 | 1253 | 1254 | 1255 | 1256 | 1257 | 1258 | 1259 | 1260 | 1261 | 1262 | 1263 | 1264 | 1265 | 1266 | 1267 | 1268 | 1269 | 1270 | 1271 | 1272 | 1273 | 1274 | 1275 | 1276 | 1277 | 1278 | 1279 | 1280 | 1281 | 1282 | 1283 | 1284 | 1285 | 1286 | 1287 | 1288 | 1289 | 1290 | 1291 | 1292 | 1293 | 1294 | 1295 | 1296 | 1297 | 1298 | 1299 | 1300 | 1301 | 1302 | 1303 | 1304 | 1305 | 1306 | 1307 | 1308 | 1309 | 1310 | 1311 | 1312 | 1313 | 1314 | 1315 | 1316 | 1317 | 1318 | 1319 | 1320 | 1321 | 1322 | 1323 | 1324 | 1325 | 1326 | 1327 | 1328 | 1329 | 1330 | 1331 | 1332 | 1333 | 1334 | 1335 | 1336 | 1337 | 1338 | 1339 | 1340 | 1341 | 1342 | 1343 | 1344 | 1345 | 1346 | 1347 | 1348 | 1349 | 1350 | 1351 | 1352 | 1353 | 1354 | 1355 | 1356 | 1357 | 1358 | 1359 | 1360 | 1361 | 1362 | 1363 | 1364 | 1365 | 1366 | 1367 | 1368 | 1369 | 1370 | 1371 | 1372 | 1373 | 1374 | 1375 | 1376 | 1377 | 1378 | 1379 | 1380 | 1381 | 1382 | 1383 | 1384 | 1385 | 1386 | 1387 | 1388 | 1389 | 1390 | 1391 | <h3>SparkFun Electronics' preferred foot prints</h3> 1392 | In this library you'll find non-functional items- supply symbols, logos, notations, frame blocks, etc. 1393 | We've spent an enormous amount of time creating and checking these footprints and parts, but it is the end user's responsibility to ensure correctness and suitablity for a given componet or application. If you enjoy using this library, please buy one of our products at www.sparkfun.com. 1394 | 1395 | Licensing: Creative Commons ShareAlike 4.0 International - https://creativecommons.org/licenses/by-sa/4.0/ 1396 | 1397 | You are welcome to use this library for commercial purposes. For attribution, we ask that when you begin to sell your device using our footprint, you email us with a link to the product being sold. We want bragging rights that we helped (in a very small part) to create your 8th world wonder. We would like the opportunity to feature your device on our homepage. 1398 | 1399 | 1400 | 1401 | 1402 | 1403 | 1404 | 1405 | 1406 | 1407 | 1408 | 1409 | 1410 | 1411 | 1412 | 1413 | >DRAWING_NAME 1414 | >LAST_DATE_TIME 1415 | >SHEET 1416 | Sheet: 1417 | >CNAME 1418 | Rev: 1419 | >DESIGNER 1420 | >CREVISION 1421 | 1422 | 1423 | 1424 | 1425 | 1426 | Schematic Frame-European Format 1427 | 1428 | Standard A4 size frame in Landscape 1429 | 1430 | 1431 | 1432 | 1433 | 1434 | 1435 | 1436 | 1437 | 1438 | 1439 | 1440 | 1441 | 1442 | 1443 | 1444 | 1445 | SOT23 1446 | 1447 | 1448 | 1449 | 1450 | 1451 | 1452 | 1453 | 1454 | >NAME 1455 | >VALUE 1456 | 1457 | 1458 | 1459 | 1460 | 1461 | 1462 | 1463 | 1464 | 1465 | 1466 | 1467 | 1468 | 1469 | 1470 | 1471 | 1472 | 1473 | 1474 | 1475 | 1476 | 1477 | 1478 | 1479 | 1480 | 1481 | 1482 | 1483 | 1484 | 1485 | 1486 | 1487 | 1488 | 1489 | 1490 | 1491 | 1492 | 1493 | 1494 | 1495 | 1496 | 1497 | 1498 | 1499 | 1500 | 1501 | 1502 | >NAME 1503 | >VALUE 1504 | D 1505 | S 1506 | G 1507 | 1508 | 1509 | 1510 | 1511 | 1512 | 1513 | 1514 | CJ2305：SMD MOSFET P-CH 8V-4.1A 1515 | 1516 | 1517 | 1518 | 1519 | 1520 | 1521 | 1522 | 1523 | 1524 | 1525 | 1526 | 1527 | 1528 | 1529 | 1530 | 1531 | 1532 | 1533 | 1534 | 1535 | 1536 | 1537 | 1538 | 1539 | 1540 | RESISTOR 1541 | SMD 1542 | 1543 | 1544 | 1545 | 1546 | 1547 | 1548 | 1549 | 1550 | 1551 | 1552 | 1553 | 1554 | >NAME 1555 | >VALUE 1556 | 1557 | 1558 | 1559 | 1560 | 1561 | 1562 | 1563 | 1564 | 1565 | 1566 | 1567 | 1568 | 1569 | 1570 | >NAME 1571 | >VALUE 1572 | 1573 | 1574 | 1575 | 1576 | 1577 | >NAME 1578 | >VALUE 1579 | 1580 | 1581 | 1582 | 1583 | 1584 | 1585 | 1586 | 1587 | 1588 | 1589 | 1590 | >NAME 1591 | >VALUE 1592 | 1593 | 1594 | 1595 | 1596 | 1597 | 1598 | 1599 | 1600 | 1601 | 1602 | 1603 | 1604 | 1605 | >NAME 1606 | >VALUE 1607 | 1608 | 1609 | RESISTOR 1610 | chip 1611 | 1612 | 1613 | 1614 | 1615 | 1616 | 1617 | 1618 | 1619 | 1620 | 1621 | 1622 | 1623 | >NAME 1624 | >VALUE 1625 | 1626 | 1627 | 1628 | 1629 | 1630 | 1631 | 1632 | 1633 | >NAME 1634 | >VALUE 1635 | 1636 | 1637 | 1638 | 1639 | 1640 | 1641 | 1642 | 1643 | 1644 | 1645 | 1646 | 1647 | >Name 1648 | >Value 1649 | 1650 | 1651 | <h3>AXIAL-0.3-KIT</h3> 1652 | 1653 | Commonly used for 1/4W through-hole resistors. 0.3" pitch between holes. 1654 | 1655 | 1656 | Warning: This is the KIT version of the AXIAL-0.3 package. This package has a smaller diameter top stop mask, which doesn't cover the diameter of the pad. This means only the bottom side of the pads' copper will be exposed. You'll only be able to solder to the bottom side. 1657 | 1658 | 1659 | 1660 | 1661 | 1662 | 1663 | 1664 | 1665 | 1666 | 1667 | >Name 1668 | >Value 1669 | 1670 | 1671 | 1672 | 1673 | 1674 | 1675 | 1676 | 1677 | 1678 | 1679 | 1680 | 1681 | 1682 | 1683 | 1684 | 1685 | 1686 | 1687 | 1688 | 1689 | 1690 | 1691 | 1692 | 1693 | 1694 | 1695 | 1/2W Resistor, 0.5" wide 1696 | 1697 | Yageo CFR series <a href="http://www.yageo.com/pdf/yageo/Leaded-R_CFR_2008.pdf">http://www.yageo.com/pdf/yageo/Leaded-R_CFR_2008.pdf</a> 1698 | 1699 | 1700 | 1701 | 1702 | 1703 | 1704 | >Name 1705 | >Value 1706 | 1707 | 1708 | 1/4W Resistor, 0.4" wide 1709 | 1710 | Yageo CFR series <a href="http://www.yageo.com/pdf/yageo/Leaded-R_CFR_2008.pdf">http://www.yageo.com/pdf/yageo/Leaded-R_CFR_2008.pdf</a> 1711 | 1712 | 1713 | 1714 | 1715 | 1716 | 1717 | >Name 1718 | >Value 1719 | 1720 | 1721 | 1/6W Thru-hole Resistor - *UNPROVEN* 1722 | 1723 | 1724 | 1725 | 1726 | 1727 | 1728 | >NAME 1729 | >VALUE 1730 | 1731 | 1732 | 1W Resistor, 0.6" wide 1733 | 1734 | Yageo CFR series <a href="http://www.yageo.com/pdf/yageo/Leaded-R_CFR_2008.pdf">http://www.yageo.com/pdf/yageo/Leaded-R_CFR_2008.pdf</a> 1735 | 1736 | 1737 | 1738 | 1739 | 1740 | 1741 | >Name 1742 | >Value 1743 | 1744 | 1745 | 2W Resistor, 0.8" wide 1746 | 1747 | Yageo CFR series <a href="http://www.yageo.com/pdf/yageo/Leaded-R_CFR_2008.pdf">http://www.yageo.com/pdf/yageo/Leaded-R_CFR_2008.pdf</a> 1748 | 1749 | 1750 | 1751 | 1752 | 1753 | 1754 | >Name 1755 | >Value 1756 | 1757 | 1758 | 1759 | 1760 | 1761 | 1762 | 1763 | 1764 | >NAME 1765 | >VALUE 1766 | 1767 | 1768 | 1769 | 1770 | 1771 | 1772 | 1773 | 1774 | 1775 | 1776 | 1777 | 1778 | 1779 | 1780 | 1781 | >NAME 1782 | >VALUE 1783 | 1784 | 1785 | 1786 | 1787 | Resistor 1788 | Basic schematic elements and footprints for 0603, 1206, and PTH resistors. 1789 | 1790 | 1791 | 1792 | 1793 | 1794 | 1795 | 1796 | 1797 | 1798 | 1799 | 1800 | 1801 | 1802 | 1803 | 1804 | 1805 | 1806 | 1807 | 1808 | 1809 | 1810 | 1811 | 1812 | 1813 | 1814 | 1815 | 1816 | 1817 | 1818 | 1819 | 1820 | 1821 | 1822 | 1823 | 1824 | 1825 | 1826 | 1827 | 1828 | 1829 | 1830 | 1831 | 1832 | 1833 | 1834 | 1835 | 1836 | 1837 | 1838 | 1839 | 1840 | 1841 | 1842 | 1843 | 1844 | 1845 | 1846 | 1847 | 1848 | 1849 | 1850 | 1851 | 1852 | 1853 | 1854 | 1855 | 1856 | 1857 | 1858 | 1859 | 1860 | 1861 | 1862 | 1863 | 1864 | 1865 | 1866 | 1867 | 1868 | 1869 | 1870 | 1871 | 1872 | 1873 | 1874 | 1875 | 1876 | 1877 | 1878 | 1879 | 1880 | 1881 | 1882 | 1883 | 1884 | 1885 | 1886 | 1887 | 1888 | 1889 | 1890 | 1891 | 1892 | 1893 | 1894 | 1895 | 1896 | 1897 | 1898 | 1899 | 1900 | 1901 | 1902 | 1903 | 1904 | 1905 | 1906 | 1907 | 1908 | 1909 | 1910 | 1911 | 1912 | 1913 | 1914 | 1915 | 1916 | 1917 | 1918 | 1919 | 1920 | 1921 | 1922 | 1923 | 1924 | 1925 | 1926 | 1927 | 1928 | 1929 | 1930 | 1931 | 1932 | 1933 | 1934 | 1935 | 1936 | 1937 | 1938 | 1939 | 1940 | 1941 | 1942 | <h3>SparkFun Jumpers</h3> 1943 | In this library you'll find jumpers, or other semipermanent means of changing current paths. The least permanent form is the solder jumper. These can be changed by adding, removing, or moving solder. In cases that are less likely to be changed we have jumpers that are connected with traces. These can be cut with a razor, or reconnected with solder. Reference designator JP. 1944 | 1945 | 1946 | We've spent an enormous amount of time creating and checking these footprints and parts, but it is the end user's responsibility to ensure correctness and suitablity for a given componet or application. 1947 | 1948 | If you enjoy using this library, please buy one of our products at <a href=" www.sparkfun.com">SparkFun.com</a>. 1949 | 1950 | 1951 | Licensing: Creative Commons ShareAlike 4.0 International - https://creativecommons.org/licenses/by-sa/4.0/ 1952 | 1953 | 1954 | You are welcome to use this library for commercial purposes. For attribution, we ask that when you begin to sell your device using our footprint, you email us with a link to the product being sold. We want bragging rights that we helped (in a very small part) to create your 8th world wonder. We would like the opportunity to feature your device on our homepage. 1955 | 1956 | 1957 | >NAME 1958 | >VALUE 1959 | 1960 | 1961 | 1962 | 1963 | 1964 | 1965 | >NAME 1966 | >VALUE 1967 | 1968 | 1969 | 1970 | 1971 | 1972 | 1973 | 1974 | 1975 | 1976 | 1977 | 1978 | 1979 | 1980 | 1981 | 1982 | 1983 | 1984 | 1985 | >NAME 1986 | >VALUE 1987 | 1988 | 1989 | 1990 | 1991 | 1992 | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | >NAME 2002 | >VALUE 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 | 2027 | 2028 | >NAME 2029 | >VALUE 2030 | 2031 | 2032 | 2033 | 2034 | 2035 | 2036 | <h3>Normally open jumper</h3> 2037 | This jumper has two pads in close proximity to each other. Apply solder to close the connection. 2038 | 2039 | Round pads are easier to solder for beginners, but are a lot larger. 2040 | SparkFun Product that uses the round pads: 2041 | <ul><li><a href="https://www.sparkfun.com/products/12781">SparkFun EL Sequencer</a></li> 2042 | </ul> 2043 | 2044 | 2045 | 2046 | 2047 | 2048 | 2049 | 2050 | 2051 | 2052 | 2053 | 2054 | 2055 | 2056 | 2057 | 2058 | 2059 | 2060 | 2061 | 2062 | 2063 | 2064 | 2065 | 2066 | 2067 | 2068 | 2069 | 2070 | 2071 | 2072 | 2073 | 2074 | 2075 | 2076 | 2077 | 2078 | 2079 | 2080 | 2081 | 2082 | 2083 | 2084 | 2085 | 2086 | 2087 | 2088 | 2089 | 2090 | 2091 | 2092 | 2093 | 2094 | 2095 | 2096 | 2097 | 2098 | 2099 | 2100 | 2101 | 2102 | 2103 | 2104 | 2105 | 2106 | 2107 | 2108 | 2109 | 2110 | 2111 | 2112 | 2113 | 2114 | 2115 | 2116 | 2117 | 2118 | 2119 | 2120 | 2121 | 2122 | With 10K+10K divide IN per 2 so with 3.3V devices, it can go up to 6.6V 2123 | If you need to divide more increase top resistor value 2124 | example R1=20K, R2=10K you can go up to 9.9V 2125 | check Voltage Divider online calculator if needed 2126 | If you don't want to use enable pin, 2127 | solder JP1, remove Q1 and R3 and you 2128 | have a basic divider. In this case to avoid 2129 | battery drain, increase resistors values 2130 | 470K + 470K for example 2131 | 1% 2132 | 1% 2133 | 1% 2134 | 1% 2135 | 2136 | 2137 | 2138 | 2139 | 2140 | 2141 | 2142 | 2143 | 2144 | 2145 | 2146 | 2147 | 2148 | 2149 | 2150 | 2151 | 2152 | 2153 | 2154 | 2155 | 2156 | 2157 | 2158 | 2159 | 2160 | 2161 | 2162 | 2163 | 2164 | 2165 | 2166 | 2167 | 2168 | 2169 | 2170 | 2171 | 2172 | 2173 | 2174 | 2175 | 2176 | 2177 | 2178 | 2179 | 2180 | 2181 | 2182 | 2183 | 2184 | 2185 | 2186 | 2187 | 2188 | 2189 | 2190 | 2191 | 2192 | 2193 | 2194 | 2195 | 2196 | 2197 | 2198 | 2199 | 2200 | 2201 | 2202 | 2203 | 2204 | 2205 | 2206 | 2207 | 2208 | 2209 | 2210 | 2211 | 2212 | 2213 | 2214 | 2215 | 2216 | 2217 | 2218 | 2219 | 2220 | 2221 | 2222 | 2223 | 2224 | 2225 | 2226 | 2227 | 2228 | 2229 | 2230 | 2231 | 2232 | 2233 | 2234 | 2235 | 2236 | 2237 | 2238 | 2239 | 2240 | 2241 | 2242 | 2243 | 2244 | 2245 | 2246 | 2247 | 2248 | 2249 | 2250 | 2251 | 2252 | 2253 | 2254 | 2255 | 2256 | 2257 | 2258 | 2259 | 2260 | 2261 | 2262 | 2263 | 2264 | 2265 | 2266 | 2267 | 2268 | Since Version 6.2.2 text objects can contain more than one line, 2269 | which will not be processed correctly with this version. 2270 | 2271 | 2272 | 2273 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Battery Voltage monitor with no current drain breakout board 2 | 3 | Based on previous couple of [voltage divider break out](https://github.com/hallard/R-Divider-Breakout) for ADS1015 ADC board, I needed a simple board being agble to measure battery voltage without draining battery current. 4 | For this I created this little basic board. It's just a basic resistor divider whith a mosfet to enable the measure so it does not drain any current from battery when not enabled. Measure is done using a analog entry of the micro controller (arduino, STM32, ESP8266, ESP32, ...) 5 | 6 | ## Detailed Description 7 | 8 | You only need 3 or 4 wires depending on what you need to achieve 9 | 10 | - VBat (connected to + of the battery) 11 | - GND (connected to - of the battery) 12 | - AN is the analog entry to measure voltage 13 | - EN is the enable pin 14 | 15 | To enable the divider to work, you need to set the EN pin to 0. Leaving this pin floating will disable the divider since there is a pullup on the transistor gate. 16 | 17 | Take care of the max voltage value of your analog input pin, some have limited value (IE ESP8266) 18 | 19 | Voltage on analog pin (when enabled) is VBat * ( R2 / (R1 + R2) ), so with R1=10K and R2=10K voltage is VBat * 0.5. So 4.2V VBat means 2.1V on analog pin. In this case, with 3.3V devices, it can go up to 6.6V 20 | If you need to divide more increase top resistor value example R1=20K, R2=10K you can go up to 9.9V. 21 | Check Voltage Divider online calculator like this [one][10] or this [one][11] if needed 22 | 23 | If you don't want to use enable pin, put some solder paste on JP1 to short the pasd, leave Q1 and R3 unpopulated and you have a basic divider. 24 | In this case to avoid battery drain (that will occurs every time), increase resistors values (470K + 470K for example) 25 | 26 | ## Schematic 27 | 28 | ![schematic](https://raw.githubusercontent.com/hallard/Battery-Voltage-Measure/master/pictures/Battery-Voltage-Measure-zoom-sch.png) 29 | 30 | Q1 can be any SOT23 P-Mosfet so BSS84, BS250, ... are fine. Resistors are 0805 package. 31 | 32 | ## Boards 33 | 34 | Top

35 | 36 | 37 | You can order the PCB of this board at [PCBs.io][3]. PCBs.io give me some reward when you order my designed boards from their site. This is pretty good, because I can use these rewards to create and design new boards and order them for free, so if you don't care about PCB manufacturer please use [PCBs.io][3]. 38 | 39 | ## License 40 | 41 | You can do whatever you like with this design. 42 | 43 | ## Misc 44 | 45 | See news and other projects on my [blog][2] 46 | 47 | [2]: https://hallard.me 48 | [3]: https://PCBs.io/share/zjqg5 49 | [10]: http://www.ohmslawcalculator.com/voltage-divider-calculator 50 | [11]: http://www.ti.com/download/kbase/volt/volt_div3.htm 51 | -------------------------------------------------------------------------------- /pictures/Battery-Voltage-Measure-bot.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hallard/Battery-Voltage-Measure/ece7d62622b17f1ef5db0d95d1a3196dcdebace4/pictures/Battery-Voltage-Measure-bot.png -------------------------------------------------------------------------------- /pictures/Battery-Voltage-Measure-sch.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hallard/Battery-Voltage-Measure/ece7d62622b17f1ef5db0d95d1a3196dcdebace4/pictures/Battery-Voltage-Measure-sch.png -------------------------------------------------------------------------------- /pictures/Battery-Voltage-Measure-top.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hallard/Battery-Voltage-Measure/ece7d62622b17f1ef5db0d95d1a3196dcdebace4/pictures/Battery-Voltage-Measure-top.png -------------------------------------------------------------------------------- /pictures/Battery-Voltage-Measure-zoom-sch.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hallard/Battery-Voltage-Measure/ece7d62622b17f1ef5db0d95d1a3196dcdebace4/pictures/Battery-Voltage-Measure-zoom-sch.png --------------------------------------------------------------------------------