The megasquirt unit and relay box

09/27/09

I'm not a web designer and I cannot figure out how to get rid of these damn premade tables so you will have to live with them!

I read everything I could on the megasquirt site and then I read it again and again etc. then I ordered the kit and soldered it all up. I bought a $35 weller soldering set up. I had a lot of soldering guns but nothing fine enough for this work. it was $35 well spent (take the tip).

I also bought 1 relay cable and then made a second one I just wasn't sure of how they went together even after all of the reading

I built the megasquirt as per the specs on the megasquirt v3 build page. I built it with the ignition signal from the negative post of the coil.

my kit didn't have the needed zenner diode that goes in backwards to complete the circuit so I used a NTE 146A 27v in its place and my tach signal is perfect

Once I completed the boars I cleaned it with alcohol and sprayed it with an acrylic conformal coating to seal it

I used this wiring diagram to wire from the relay board (or from the megasquirt BD37 plug) to the various sensors etc. I don't know

who originally drew this diagram but i found it one of the best I had seen (sorry about the scan quality email me for the original)

This site was last updated 03/04/09