├── README.md
└── DigitalThrottle
    └── DigitalThrottle.ino


/README.md:
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 1 | # DigitalThrottle
 2 | 
 3 | An interface for the Leadrise Motor Controller which allows the use of 0-5V throttles instead of requiring (more expensive) 5K throttles.
 4 | 
 5 | We use a Microchip Technologies MCP4131-104E/P Digital Potentiometer controlled by an Arduino to emulate the resistive throttle.
 6 | 
 7 | ---
 8 | 
 9 | Pete Prodoehl
10 | 
11 | <pete@2xlnetworks.com>
12 | 
13 | http://rasterweb.net/raster/
14 | 
15 | 


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/DigitalThrottle/DigitalThrottle.ino:
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 1 | /*
 2 |  * DigitalThrottle.ino
 3 |  * 
 4 |  * An interface for the Leadrise Motor Controller which allows the use
 5 |  * of 0-5V throttles instead of requiring (more expensive) 5K throttles.
 6 |  * 
 7 |  * We use a Microchip Technologies MCP4131-104E/P Digital Potentiometer
 8 |  * controlled by an Arduino to emulate the resistive throttle.
 9 |  * 
10 |  * 
11 |  * Pete Prodoehl <pete@2xlnetworks.com>
12 |  * 
13 |  */
14 | 
15 | 
16 | #include <SPI.h>
17 | 
18 | 
19 | byte address = 0x00;
20 | int CS = 10;
21 | int throttlePin = 0;
22 | int throttleVal = 0;
23 | int resistVal = 0;
24 | 
25 | int LEDpin = 2;
26 | 
27 | int debug = 1;
28 | 
29 | void setup() {
30 |   pinMode(CS, OUTPUT);
31 |   SPI.begin();
32 |   
33 |   if (debug > 0) {
34 |     Serial.begin(9600);
35 |   }
36 |   pinMode(LEDpin, OUTPUT);
37 |   digitalWrite(LEDpin, HIGH);
38 | }
39 | 
40 | void loop() {
41 |   
42 |   throttleVal = analogRead(throttlePin);
43 |   resistVal = constrain(map(throttleVal, 500, 700, 0, 255), 0, 255);
44 |   digitalPotWrite(resistVal);
45 | 
46 |   if (debug > 0) {
47 |     Serial.print(throttleVal);
48 |     Serial.print("\t");
49 |     Serial.println(resistVal);
50 |   }
51 | 
52 | }
53 | 
54 | int digitalPotWrite(int value) {
55 |   digitalWrite(CS, LOW);
56 |   SPI.transfer(address);
57 |   SPI.transfer(value);
58 |   digitalWrite(CS, HIGH);
59 | }
60 | 
61 | 
62 | 
63 | 


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