Asked — Edited
These Rc lawnmowers caught my attention, So i purchased a spectrum DXE remote controler with reciever, also purchased a 2x32 sabertooth drive. I have a key start mower, just don’t know what othe components i need to start my mower from the controller any help please?
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If your looking to use the EZ-B V4, then follow DJ's advice...
use the ARC script command SET() to turn on or off a port, which turns on or off the solid state relay.
As for knowing when the engine is running... You can detect a stall by monitoring the Stator or Alternator (which ever it has). It most likely has a stator, so it'll be giving off voltage that goes to the rectifier. The rectifier turns the AC current from the stator into DC +5 and/or +12 for electronics/lights. If you monitor that voltage from the rectifier with the ADC port of the EZ-B, you can detect when the engine is running. The ADC can only support up to +5v, so you'll need to use a voltage divider if the rectifier returns +12v. A voltage divider is merely 2 or 3 resistors and there's online calculators that'll help you determine the values needed. Start by finding what voltage and pins you'll need to detect from the rectifier first. You can read the voltage of a port with ARC script command GETADC() to see if the engine is running.
Lastly, i highly recommend an emergency shutdown. I'd recommend both a manual switch AND a relay on the EZ-B v4 connection status pin. The EZ-B v4 has a setting in the web configuration that lets you determine status of a connection on a digital pin. This means that if the lawn mower disconnects from the PC, the pin will go LOW and you can shut off the relay to the engine.