Analog Output

Overview

An Analog Output drives a real analog voltage on a hardware pin (digital-to-analog conversion). Use it to feed the analog input of another ECU, or to drive an analog gauge or meter, by turning a control value into a voltage. You set an output voltage range/reference and a scaling that maps your input (engineering) value onto a voltage within that range.

Prerequisites & hardware

  • Wire the output pin to the analog input it should drive, with a common ground between the controller and the receiving device.
  • Pick a range the receiving input can accept (e.g. 0–5 V or 0–12 V); do not exceed its input rating.
  • Have a source value (a map, driver or input) ready to command the output.

Add it in the app

  1. Add a new output and choose Analog Output as the type.
  2. Select the pin and give it an alias (e.g. Boost Gauge Drive).
  3. Choose the output range, then set the in and out scaling points.
  4. Drive the output from a map/driver that supplies the input value.

Settings reference

Setting Meaning Unit Range / values Notes
Range Output voltage scale / reference — 5V, Internal 5 V, 12V, Raw Sets the full-scale voltage the Out values refer to. Internal 5 V uses the controller's own 5 V reference; Raw outputs the unscaled DAC value.
Enable interpolation Scale the input through the in/out points — on / off On = interpolate input to output voltage; off = pass the value straight through.
In min / In max Input (engineering) range to scale from source unit sint32 The source low/high points.
Out min / Out max Output voltage range to scale to mV sint32 The voltage produced at In min / In max, within the selected range.

Scaling: the input value is mapped from In min…In max to Out min…Out max using two-point interpolation.

Common settings

Analog Output also uses the shared settings — alias and pin. See Common IO Settings.

Example — 0–5 V boost gauge drive

  1. Type Analog Output, alias Boost Gauge Drive, on the gauge's pin.
  2. Range = 5V, Enable interpolation on.
  3. In min/max 0/300 (kPa) → Out min/max 0/5000 (mV).
  4. Command it from the boost-pressure channel; 0 kPa gives 0 V, 300 kPa gives 5 V.

Troubleshooting

  • Output voltage too high/low for the device: pick a smaller Range or lower the Out max value.
  • Voltage doesn't change with the command: check Enable interpolation is on and that the In min/In max span matches the source's real range.
  • Reads as a fixed offset on the receiver: confirm a shared ground and that the receiver's range matches the selected Range.
  • PWM Output — for a switched/PWM signal instead of a voltage.
  • Tacho Output — generated tacho/frequency signal.