This replaces the stepper module output to add two ignition outputs and a relay output.
Includes unsoldered header pins to allow for cheap envelope shipping.
NOTE: The mounted output resistors are 47 ohm, a different value may be recommended for your coil/ignition module.
NOTE: UA4C vC2 and later do not have a stepper socket any longer, because stepper control is built in. So these cannot be used on those boards.
Step pin – Ignition channel 1 – B1
Direction pin – Ignition channel 2 – A1
Enable pin – Relay Driver, 650mA rated – B2
Big thanks to Ash (vandea05) for the idea.