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Variant ADC
Candas1 edited this page Apr 5, 2023
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This variant can be used with analog inputs like potentiometers, joysticks or a throttle handle, even if using hall sensors. Here is a video walking you through how to setup the firmare to use it with a joystick.
For driving with a separate throttle and brake, please use Hovercar variant.
Voltage Control Mode is used by default for this variant.
Voltage Control Mode is used by default.
- ADC_ALTERNATE_CONNECT : to swap the inputs, in case you cannot do it physically
- ADC_PROTECT_THRESH : to adjust the threshold below/above the MIN/MAX ADC values that will trigger ADC protection
- ADC_PROTECT_TIMEOUT : number of wrong / missing input commands before safety state is taken
Please also check the parameters that are common to all the variants.
- Connect the potentiometer/hall sensor VCC to 3.3v from programming port or from a voltage regulator,
⚠️ Red wire from sensor cable delivers 15v !!! - Connect the output of the potentiometer/hall sensor to the blue wire (ADC1) for steering and green wire (ADC2) for speed on left sensor board cable
- Connect the potentiometer/hall sensor to ground,
⚠️ On some boards, the black wire is 15v !!! Check with a multi-meter to make sure 15V and ground are not swapped - 100k Pull down resistors connected to ground are recommended to prevent issues when inputs are floating (wire is cut or disconnected) triggering ADC protection
- If you don’t need steering, set input1_type to 0 in order to disable the input or go through the auto-calibration procedure :
#define PRI_INPUT1 0, 0, 0, 4095, 0 // TYPE, MIN, MID, MAX, DEADBAND. See INPUT FORMAT section
Proceed with calibration to select the right type of inputs, for better control and proper ADC protection.
If wheels are not spinning or you get 2 beeps, make sure you have done proper calibration.