├── .asoundrc ├── .gitignore ├── LICENSE ├── README.md ├── face-plate ├── PXL_20211214_134805985.jpg └── radio.xcf ├── install.sh ├── lowPowerDaemon.py ├── media ├── 1900 │ └── .PUT_MEDIA_HERE ├── 1910 │ └── .PUT_MEDIA_HERE ├── 1920 │ └── .PUT_MEDIA_HERE ├── 1930 │ └── .PUT_MEDIA_HERE ├── 1940 │ └── .PUT_MEDIA_HERE ├── 1950 │ └── .PUT_MEDIA_HERE ├── 1960 │ └── .PUT_MEDIA_HERE ├── 1970 │ └── .PUT_MEDIA_HERE ├── 1980 │ └── .PUT_MEDIA_HERE ├── 1990 │ └── .PUT_MEDIA_HERE ├── administrative │ ├── lowbattery.mp3 │ └── tardis.mp3 └── grandpa-george │ ├── .PUT_MEDIA_HERE │ ├── George records message to Lindsay to be listened to after his death.mp3 │ ├── George, Rosey and Stuart singing -Rosey teaching Stu guitar -Rosey visiting from QLD.mp3 │ ├── Lindsay-Rosalie-Stuart-recording-nurseryrhymes-with-their-dad-George-1955.mp3 │ ├── Rosey records tape for George -includes Byron, Sharon and Shayne.mp3 │ └── Unknown -possibly George recording himself playing the mouth organ.mp3 ├── powerSwitchDaemon.py ├── radio.py ├── soxplayer.py ├── systemd-files ├── tardis-radio-low-power-daemon.service ├── tardis-radio-power-switch-daemon.service ├── tardis-radio-volume-daemon.service └── tardis-radio.service ├── volumeDaemon.py └── wiring-diagrams ├── pots.jpg └── power.jpg /.asoundrc: -------------------------------------------------------------------------------- 1 | pcm.softvol { 2 | type softvol 3 | slave { 4 | pcm "hw:CARD=sndrpihifiberry,DEV=0" 5 | } 6 | control { 7 | name "Master" 8 | card 0 9 | } 10 | } 11 | 12 | pcm.!default { 13 | type plug 14 | slave.pcm "softvol" 15 | } 16 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | __pycache__ 2 | media/1900/* 3 | media/1910/* 4 | media/1920/* 5 | media/1930/* 6 | media/1940/* 7 | media/1950/* 8 | media/1960/* 9 | media/1970/* 10 | media/1980/* 11 | media/1990/* 12 | !.PUT_MEDIA_HERE 13 | .vscode 14 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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Limitation of Liability. 601 | 602 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 606 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 610 | SUCH DAMAGES. 611 | 612 | 17. Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # tardis-radio 2 | Time machine radio on the Raspberry Pi Zero 3 | 4 | # YouTube 5 |
6 | A video showing a `time machine radio` made possible by a Raspberry Pi Zero 9 | 10 | 11 | ## Buy the hardware 12 | * [Raspberry Pi Zero W 2](https://www.google.com/search?q=raspberry+pi+zero+w+2&tbm=shop) 13 | * [Pimoroni Audio Amp SHIM](https://www.google.com/search?q=Pimoroni+Audio+Amp+SHIM&tbm=shop) 14 | * [Adafruit PowerBoost 1000C](https://www.google.com/search?q=adafruit+powerboost+1000c&tbm=shop) 15 | * [Proto Board for RPi-Zero](https://www.google.com/search?tbm=shop&q=Raspberry+Pi+Zero+Proto+Board) 16 | * [Tuning Potentiometer - PTV09A-4025F-B103](https://www.google.com/search?tbm=shop&q=PTV09A-4025F-B103) 17 | * [MCP3008 IC](https://www.google.com/search?tbm=shop&q=MCP3008) 18 | * [On/Off switch (DPDT on-on)](https://www.google.com/search?tbm=shop&q=DPDT+switch+on-on) 19 | * [Enclosure (NR-3013 Radio)](https://www.google.com/search?tbm=shop&q=NR-3013+radio) 20 | * [Micro-USB mount](https://www.google.com/search?q=Micro+USB+B+Jack+to+USB+A+Plug+Round+Panel+Mount+Adapter&tbm=shop) 21 | * [the exact one I bought](https://core-electronics.com.au/micro-usb-b-jack-to-usb-a-plug-round-panel-mount-adapter.html) 22 | 23 | ## Software Installation instructions 24 | 25 | ### Enable the DAC AMP SHIM 26 | place the following in your SD card's /boot/config.txt 27 | ``` 28 | dtoverlay=hifiberry-dac 29 | ``` 30 | 31 | enable the SPI Interface through the raspberry pi's config 32 | ``` 33 | sudo raspi-config 34 | 35 | # Interface > SPI > Enable 36 | ``` 37 | 38 | ### Install git 39 | ``` 40 | sudo apt install git 41 | ``` 42 | 43 | ### Clone repo 44 | ``` 45 | git clone https://github.com/byte-rider/tardis-radio.git 46 | ``` 47 | ### Run installer script 48 | ``` 49 | cd tardis-radio 50 | sudo ./install.sh 51 | ``` 52 | 53 | ## Hardware modifications 54 | stub 55 | 56 | ## Wiring diagrams 57 | ![alt text](https://raw.githubusercontent.com/byte-rider/tardis-radio/master/wiring-diagrams/pots.jpg "wiring diagram of the potentiometers") 58 | ![alt text](https://raw.githubusercontent.com/byte-rider/tardis-radio/master/wiring-diagrams/power.jpg "wiring diagram of the power-related modules") 59 | -------------------------------------------------------------------------------- /face-plate/PXL_20211214_134805985.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/george-edwards/tardis-radio/b015f010c264a16931be317687a56a01bc52cc6d/face-plate/PXL_20211214_134805985.jpg -------------------------------------------------------------------------------- /face-plate/radio.xcf: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/george-edwards/tardis-radio/b015f010c264a16931be317687a56a01bc52cc6d/face-plate/radio.xcf -------------------------------------------------------------------------------- /install.sh: -------------------------------------------------------------------------------- 1 | #!/bin/bash -v 2 | echo "installing pre-requisites" 3 | sudo apt install sox libsox-fmt-all bc -y 4 | 5 | echo "installing systemd daemons" 6 | sudo cp systemd-files/* /lib/systemd/system/ 7 | sudo systemctl daemon-reload 8 | #sudo systemctl enable tardis-radio-low-power-daemon.service 9 | #sudo systemctl enable tardis-radio-power-switch-daemon.service 10 | sudo systemctl enable tardis-radio.service 11 | sudo systemctl enable tardis-radio-volume-daemon.service 12 | 13 | echo "configuring sound device for soft-volume" 14 | cp .asoundrc /home/pi/ 15 | -------------------------------------------------------------------------------- /lowPowerDaemon.py: -------------------------------------------------------------------------------- 1 | from soxplayer import SoxPlayer 2 | import RPi.GPIO as GPIO 3 | import os 4 | from time import sleep 5 | 6 | radio = SoxPlayer() 7 | lowBatteryPin = 27 8 | 9 | GPIO.setmode(GPIO.BCM) 10 | GPIO.setup(lowBatteryPin, GPIO.IN) 11 | 12 | while True: 13 | if not (GPIO.input(lowBatteryPin)): 14 | os.system("sudo systemctl stop tardis-radio.service") 15 | radio.play("/home/pi/tardis-radio/media/administrative/lowbattery.mp3", True) 16 | os.system("sudo shutdown now") 17 | sleep(90) 18 | sleep(0.5) -------------------------------------------------------------------------------- /media/1900/.PUT_MEDIA_HERE: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/george-edwards/tardis-radio/b015f010c264a16931be317687a56a01bc52cc6d/media/1900/.PUT_MEDIA_HERE -------------------------------------------------------------------------------- /media/1910/.PUT_MEDIA_HERE: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/george-edwards/tardis-radio/b015f010c264a16931be317687a56a01bc52cc6d/media/1910/.PUT_MEDIA_HERE -------------------------------------------------------------------------------- /media/1920/.PUT_MEDIA_HERE: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/george-edwards/tardis-radio/b015f010c264a16931be317687a56a01bc52cc6d/media/1920/.PUT_MEDIA_HERE -------------------------------------------------------------------------------- /media/1930/.PUT_MEDIA_HERE: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/george-edwards/tardis-radio/b015f010c264a16931be317687a56a01bc52cc6d/media/1930/.PUT_MEDIA_HERE -------------------------------------------------------------------------------- /media/1940/.PUT_MEDIA_HERE: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/george-edwards/tardis-radio/b015f010c264a16931be317687a56a01bc52cc6d/media/1940/.PUT_MEDIA_HERE -------------------------------------------------------------------------------- /media/1950/.PUT_MEDIA_HERE: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/george-edwards/tardis-radio/b015f010c264a16931be317687a56a01bc52cc6d/media/1950/.PUT_MEDIA_HERE -------------------------------------------------------------------------------- /media/1960/.PUT_MEDIA_HERE: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/george-edwards/tardis-radio/b015f010c264a16931be317687a56a01bc52cc6d/media/1960/.PUT_MEDIA_HERE -------------------------------------------------------------------------------- /media/1970/.PUT_MEDIA_HERE: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/george-edwards/tardis-radio/b015f010c264a16931be317687a56a01bc52cc6d/media/1970/.PUT_MEDIA_HERE -------------------------------------------------------------------------------- /media/1980/.PUT_MEDIA_HERE: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/george-edwards/tardis-radio/b015f010c264a16931be317687a56a01bc52cc6d/media/1980/.PUT_MEDIA_HERE -------------------------------------------------------------------------------- /media/1990/.PUT_MEDIA_HERE: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/george-edwards/tardis-radio/b015f010c264a16931be317687a56a01bc52cc6d/media/1990/.PUT_MEDIA_HERE -------------------------------------------------------------------------------- /media/administrative/lowbattery.mp3: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/george-edwards/tardis-radio/b015f010c264a16931be317687a56a01bc52cc6d/media/administrative/lowbattery.mp3 -------------------------------------------------------------------------------- /media/administrative/tardis.mp3: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/george-edwards/tardis-radio/b015f010c264a16931be317687a56a01bc52cc6d/media/administrative/tardis.mp3 -------------------------------------------------------------------------------- /media/grandpa-george/.PUT_MEDIA_HERE: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/george-edwards/tardis-radio/b015f010c264a16931be317687a56a01bc52cc6d/media/grandpa-george/.PUT_MEDIA_HERE -------------------------------------------------------------------------------- /media/grandpa-george/George records message to Lindsay to be listened to after his death.mp3: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/george-edwards/tardis-radio/b015f010c264a16931be317687a56a01bc52cc6d/media/grandpa-george/George records message to Lindsay to be listened to after his death.mp3 -------------------------------------------------------------------------------- /media/grandpa-george/George, Rosey and Stuart singing -Rosey teaching Stu guitar -Rosey visiting from QLD.mp3: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/george-edwards/tardis-radio/b015f010c264a16931be317687a56a01bc52cc6d/media/grandpa-george/George, Rosey and Stuart singing -Rosey teaching Stu guitar -Rosey visiting from QLD.mp3 -------------------------------------------------------------------------------- /media/grandpa-george/Lindsay-Rosalie-Stuart-recording-nurseryrhymes-with-their-dad-George-1955.mp3: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/george-edwards/tardis-radio/b015f010c264a16931be317687a56a01bc52cc6d/media/grandpa-george/Lindsay-Rosalie-Stuart-recording-nurseryrhymes-with-their-dad-George-1955.mp3 -------------------------------------------------------------------------------- /media/grandpa-george/Rosey records tape for George -includes Byron, Sharon and Shayne.mp3: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/george-edwards/tardis-radio/b015f010c264a16931be317687a56a01bc52cc6d/media/grandpa-george/Rosey records tape for George -includes Byron, Sharon and Shayne.mp3 -------------------------------------------------------------------------------- /media/grandpa-george/Unknown -possibly George recording himself playing the mouth organ.mp3: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/george-edwards/tardis-radio/b015f010c264a16931be317687a56a01bc52cc6d/media/grandpa-george/Unknown -possibly George recording himself playing the mouth organ.mp3 -------------------------------------------------------------------------------- /powerSwitchDaemon.py: -------------------------------------------------------------------------------- 1 | import RPi.GPIO as GPIO 2 | import os 3 | from time import sleep 4 | 5 | powerSwitchPin = 22 6 | keepAlivePin = 23 7 | 8 | GPIO.setmode(GPIO.BCM) 9 | GPIO.setup(powerSwitchPin, GPIO.IN) 10 | GPIO.setup(keepAlivePin, GPIO.OUT) 11 | 12 | while True: 13 | GPIO.output(keepAlivePin, GPIO.HIGH) 14 | if not GPIO.input(powerSwitchPin): 15 | os.system("sudo systemctl stop tardis-radio.service") 16 | os.system("play -q /home/pi/tardis-radio/media/administrative/lowbattery.mp3 2>/dev/null") 17 | os.system("sudo poweroff") 18 | sleep(30) 19 | sleep(0.05) 20 | -------------------------------------------------------------------------------- /radio.py: -------------------------------------------------------------------------------- 1 | import os 2 | import time 3 | import glob 4 | import random 5 | from gpiozero import MCP3008 6 | from soxplayer import SoxPlayer 7 | 8 | media_admin = glob.glob("/home/pi/tardis-radio/media/administrative/*.mp3") 9 | media_1900 = glob.glob("/home/pi/tardis-radio/media/1900/*.mp3") 10 | media_1910 = glob.glob("/home/pi/tardis-radio/media/1910/*.mp3") 11 | media_1920 = glob.glob("/home/pi/tardis-radio/media/1920/*.mp3") 12 | media_1930 = glob.glob("/home/pi/tardis-radio/media/1930/*.mp3") 13 | media_1940 = glob.glob("/home/pi/tardis-radio/media/1940/*.mp3") 14 | media_1950 = glob.glob("/home/pi/tardis-radio/media/1950/*.mp3") 15 | media_1960 = glob.glob("/home/pi/tardis-radio/media/1960/*.mp3") 16 | media_1970 = glob.glob("/home/pi/tardis-radio/media/1970/*.mp3") 17 | media_1980 = glob.glob("/home/pi/tardis-radio/media/1980/*.mp3") 18 | media_1990 = glob.glob("/home/pi/tardis-radio/media/1990/*.mp3") 19 | media_grandpa_george = glob.glob("/home/pi/tardis-radio/media/grandpa-george/*.mp3") 20 | 21 | # Globals 22 | RADIO = SoxPlayer(media_admin[0]) 23 | CURRENT_CHANNEL_PLAYLIST = [] 24 | KNOB = MCP3008(channel=0) 25 | HEARD = [] 26 | 27 | # get_channel() finds out where the pot is pointing to and returns the appropriate playlist name. 28 | def get_channel(): 29 | 30 | channels = 11 31 | radix = 1 / channels 32 | 33 | # get the average pot value after n readings. This reduces channels 'flipping' back and forth 34 | # when tuned near the borders of two decades. 35 | n = 20 36 | runningTotal = 0 37 | for i in range(n): 38 | runningTotal += KNOB.value 39 | averageValue = runningTotal / n 40 | 41 | if averageValue < (1 * radix): 42 | return media_1900 43 | if averageValue < (2 * radix): 44 | return media_1910 45 | if averageValue < (3 * radix): 46 | return media_1920 47 | if averageValue < (4 * radix): 48 | return media_1930 49 | if averageValue < (5 * radix): 50 | return media_1940 51 | if averageValue < (6 * radix): 52 | return media_1950 53 | if averageValue < (7 * radix): 54 | return media_1960 55 | if averageValue < (8 * radix): 56 | return media_1970 57 | if averageValue < (9 * radix): 58 | return media_1980 59 | if averageValue < (10 * radix): 60 | return media_1990 61 | if averageValue <= (11 * radix): 62 | return media_grandpa_george 63 | 64 | def change_channel(newChannelPlaylist): 65 | global CURRENT_CHANNEL_PLAYLIST 66 | global HEARD 67 | global RADIO 68 | 69 | # stop whatever's playing 70 | RADIO.stop() 71 | 72 | # put all heard songs back 73 | CURRENT_CHANNEL_PLAYLIST.extend(HEARD) 74 | HEARD.clear() 75 | 76 | # set new channel 77 | CURRENT_CHANNEL_PLAYLIST = newChannelPlaylist 78 | 79 | # pick a random song and move it to the heard playlist 80 | song = random.choice(CURRENT_CHANNEL_PLAYLIST) 81 | HEARD.append(song) 82 | CURRENT_CHANNEL_PLAYLIST.remove(song) 83 | 84 | # play the tuning sound (tardis) and then the song 85 | RADIO.tune_and_play(song) 86 | print('[TUNING] ' + str(song.split("/")[5])) 87 | 88 | def play_next_song(): 89 | global CURRENT_CHANNEL_PLAYLIST 90 | global HEARD 91 | global RADIO 92 | 93 | # pick a song at random and move it to the heard playlist 94 | song = random.choice(CURRENT_CHANNEL_PLAYLIST) 95 | HEARD.append(song) 96 | CURRENT_CHANNEL_PLAYLIST.remove(song) 97 | 98 | # play the song 99 | RADIO.play(song) 100 | 101 | # Initialise 102 | change_channel(get_channel()) 103 | 104 | while True: 105 | # change channel when appropriate 106 | if get_channel() != CURRENT_CHANNEL_PLAYLIST: 107 | change_channel(get_channel()) 108 | 109 | # play next song when appropriate 110 | if not RADIO.is_playing(): 111 | play_next_song() 112 | 113 | time.sleep(0.05) 114 | -------------------------------------------------------------------------------- /soxplayer.py: -------------------------------------------------------------------------------- 1 | import os 2 | import subprocess 3 | import time 4 | 5 | class SoxPlayer: 6 | ''' 7 | A wrapper for SoX program. SoX is invoked through shell commands spawned by Python subprocesses 8 | requirements: 9 | sudo apt install sox libsox-fmt-all bc 10 | ''' 11 | currentlyPlayingProcess = None 12 | tardisPath = None 13 | 14 | # pass the tardis mp3's path through upon instantiation 15 | def __init__(self, tardisPath = None) -> None: 16 | if tardisPath != None: 17 | self.tardisPath = tardisPath 18 | pass 19 | 20 | def play(self, songPath, blocking = False): 21 | self.stop() 22 | 23 | if blocking: 24 | os.system(f"AUDIODEV=hw:1,0 /usr/bin/play -q '{songPath}' 2>/dev/null") 25 | else: 26 | self.currentlyPlayingProcess = subprocess.Popen(['sox', '-V0', '-q', songPath, '-d']) 27 | 28 | def tune_and_play(self, songPath, percentage = 0.5): 29 | ''' 30 | stop the current song, play the tardis sound while fading-in the new song. 31 | The new song will begin @percentage of the way through (function argument) 32 | ''' 33 | 34 | # kill old song 35 | self.stop() 36 | 37 | # find the starting position of the song using the length of the song * percentage. The length is got by soxi and the calculation by bc 38 | songStartingPosition = subprocess.check_output(f"echo $(soxi -D \"{songPath}\")*{percentage}/1 | bc", shell=True, universal_newlines=True) 39 | 40 | # play the tardis and the new song together, but fade the new song in allowing time for the tardis to be heard on its own 41 | cmd1 = subprocess.Popen(['sox', '-V0', '-q', songPath, '-p', 'trim', f'{int(songStartingPosition)}', 'fade', '5'], stdout=subprocess.PIPE) 42 | self.currentlyPlayingProcess = subprocess.Popen(['sox', '-V0', '-q', '-', '-m', self.tardisPath, '-d'], stdin=cmd1.stdout) 43 | 44 | def stop(self): 45 | os.system("sudo killall -9 sox") 46 | 47 | def is_playing(self): 48 | if self.currentlyPlayingProcess == None or self.currentlyPlayingProcess.poll() != None: 49 | return False 50 | else: 51 | return True -------------------------------------------------------------------------------- /systemd-files/tardis-radio-low-power-daemon.service: -------------------------------------------------------------------------------- 1 | [Unit] 2 | Description=Low Power Daemon - Watches GPIO pin 25 for a change from HIGH to LOW signalling a nearly-empty battery. Daemon then plays a poweroff sound and gracefully shuts the system off 3 | After=multi-user.target 4 | 5 | [Service] 6 | Type=idle 7 | User=pi 8 | ExecStart=/usr/bin/python3 /home/pi/tardis-radio/lowPowerDaemon.py 9 | 10 | [Install] 11 | WantedBy=multi-user.target 12 | -------------------------------------------------------------------------------- /systemd-files/tardis-radio-power-switch-daemon.service: -------------------------------------------------------------------------------- 1 | [Unit] 2 | Description=Power Switch Daemon - will gracefully shut the system down once the power switch is flipped. 3 | After=multi-user.target 4 | 5 | [Service] 6 | Type=idle 7 | User=pi 8 | 9 | ExecStart=/usr/bin/python3 /home/pi/tardis-radio/powerSwitchDaemon.py 10 | 11 | [Install] 12 | WantedBy=multi-user.target 13 | -------------------------------------------------------------------------------- /systemd-files/tardis-radio-volume-daemon.service: -------------------------------------------------------------------------------- 1 | [Unit] 2 | Description=Volume Daemon - Adjusts volume based off potentiometer value 3 | After=multi-user.target 4 | 5 | [Service] 6 | Type=idle 7 | User=pi 8 | ExecStart=/usr/bin/python3 /home/pi/tardis-radio/volumeDaemon.py 9 | 10 | [Install] 11 | WantedBy=multi-user.target 12 | -------------------------------------------------------------------------------- /systemd-files/tardis-radio.service: -------------------------------------------------------------------------------- 1 | [Unit] 2 | Description=Radio daemon - plays radio from the decade 'tuned' 3 | After=multi-user.target 4 | 5 | [Service] 6 | Type=idle 7 | User=pi 8 | ExecStart=/usr/bin/python3 /home/pi/tardis-radio/radio.py 9 | 10 | [Install] 11 | WantedBy=multi-user.target 12 | -------------------------------------------------------------------------------- /volumeDaemon.py: -------------------------------------------------------------------------------- 1 | import os 2 | import time 3 | from gpiozero import MCP3008 4 | 5 | volumePot = MCP3008(channel=1) 6 | volumeValue = 0 7 | 8 | while True: 9 | # To invert the volume control comment out the other one of the two lines below. 10 | # By invert I mean if the volume goes down rather than up while rotating clockwise. 11 | 12 | #newValue = int(volumePot.value) * 255) 13 | newValue = int((1 - volumePot.value) * 255) 14 | 15 | # the threashold below can be increased depending on how 'jumpy' your volume pot is 16 | if not volumeValue-1 <= newValue < volumeValue+1: 17 | volumeValue = newValue 18 | os.system(f'amixer set Master {volumeValue}') 19 | time.sleep(0.05) -------------------------------------------------------------------------------- /wiring-diagrams/pots.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/george-edwards/tardis-radio/b015f010c264a16931be317687a56a01bc52cc6d/wiring-diagrams/pots.jpg -------------------------------------------------------------------------------- /wiring-diagrams/power.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/george-edwards/tardis-radio/b015f010c264a16931be317687a56a01bc52cc6d/wiring-diagrams/power.jpg --------------------------------------------------------------------------------