DIYEFI.co.uk Spark Driver Board

From $1

1. DB25 connector
2. Usage Notes

Up to 4 Spark Drivers (up to 8 cylinders)
6 Auxiliary input/outputs for patching though fan relays,ICV's, LEDs, boost, shift lights etc. See Multi-Output driver board
Preinstalled 330R resistors, ready for direct connection to Megasquirt.
Compatible with VB921, Bosch BIP373 & Fairchild IGBT drivers.
Dual layer PCB with dual 2oz copper tracks for each driver output for maximum current output.
DB25 plug, uses 3 Pins per driver output.
Fuse Protection (20 Amp blade fuse installed)
Dimentions: 21mm x 65mm x 45mm (HxWxD)

DB25 connector

Pin
1,2,14	Spark output A
5,6,18	Spark output B
9,10,22	Spark output C
12,13,25	Spark output D
15	Aux in/out
16	Aux in/out
17	Aux in/out
19	Aux in/out
20,21	Aux in/out
23/24	Aux in/out

Usage Notes

Make sure the board, is properly grounded. It's designed to be mounted on metel, which must be grounded to the vehicles negative supply.

Use isolators on the drivers (supplied), and make sure they are bolted down to metal to act as a heatsink. When fixing the drivers to a metal surface, make sure any drilled holes are free from any stray bits of metal. Countersink them is necessary with a large drill bit. It's very easy to cause a short. Test with a continuity tester/multimeter to be sure.

Connect the pins A, B, C & D to your megasquirt board. The diagram below may help. Read the Megasquirt-extra manual for a more detailed description of the outputs.

The spark outputs should be connected to the negative terminal/pins of the coil.