We’re on a kick for tiny boards!
This one adapts Tachometers to work with engines converted to use multiple coil packs. Up to 4 coil packs are supported. An annoying problem neatly solved!
This board is very small, making it easy to integrate inline into your existing wiring harness. Just wrap with electrical tape or shrink tubing!
Here it is wired for 2 coil packs: a typical 4 cylinder configuration.
Yellow wire goes to tachometer, red / black wire connects to the drive wire of each coil pack.
Available for purchase in our online store . Full installation instructions.
Tachometer adapter questions.
Looking at your tachometer adapter – it looks like you are using 100K resistors across the diodes.
There is no zener diode before tach output?
Hope you can help.
Cheers
Hi Perry,
Yes, this is an improved design – the resistors help with certain tachometers that need to see a 12v signal in addition to the high voltage kickback pulse generated by the coil primary windings.