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¶

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.

Related¶

• PWM Output — for a switched/PWM signal instead of a voltage.
• Tacho Output — generated tacho/frequency signal.