As part of my EFI conversion on a Triumph Stag, I needed an easy way to get a Speeduino compatible trigger for engine speed. So I had some boards made to condition the pulse from a classic ignition coil negative into a 5v square wave. Uses the same schematic as the CoilX board. So has an opto-isolator and inverting trigger to give a nice output. Tested working on my setup but no guarantees made and no liability etc...
Costs meant that I ended up with about 20 of these boards, and only need a couple myself, so they're up for sale if anyone wants one at cost plus postage.
I've listed them on my site https://invisiblefuelinjection.co.uk/sh ... rigger-pcb, use the discount code "speedy" to bring it down to cost price
Connections needed are:
- Engine Ground