DB-37 megasquirt connector
has been replaced with this commercial connectors
board for Megasquirt V3 and V3.57 ver3 and Stimulator DB-37adaptor
updated april 2015
Description ver 3 adaptor
new connector configuration allows the connectors to
handle the current in the automotive environment.
Inputs are wired in one connector and the outputs
to another connector. We designed an adaptor
board to connect the commercial connectors Mini-Fit Jnr to the megasquirt board. This ver3 adaptor do the conversion from DB-37 to commercial connector.
This make the conversion much more simple and more reliable.
The total connectors has 30 pins. 14 pins for inputs and 16 pins for outputs. See the following.
X11 to X14 pins connected to the megasquirt board.
4 Spark outputs or any power output spare pins
4 injector driver (diver 1 and driver 2) and fuel pump.
1 power mosfet output (Q16). Coil driver as a basic unit or pwm power output.
Stimulator adaptor board for Megasquirt V3, V3.57 and V2.2
adaptor allows the Jimstim or any stimulator to plug to the new connectors configuration on our megasquirt. Each 14 and 16 pins connector has spare pads to jump to stim for extra connections. It adapt DB-37 connector to the mini-fit connectors.
The adaptor board can be assembled or you can do it yourself with the adaptor board kit. The kit included 14 pins pcb header with cable connector and crimp pins, 16 pins pcb header with cable connector and crimp pins.
Insert the assembled adaptor board into the V3 or V3.57 DB-37 footprint. If the megasquirt board is already populated you ll need to remove the parts under the adaptor board area and solder them under the board. Move the MAP sensor on TOP.
V3 (Please take note no part ll need to move under the board with the new DB-37 adaptor minus the MAP)
TOP :Relocate the following part under the board here:R30,R31,R32,R16,D4,D8,D10,D11,D12,D19,C15,C3,MOV1,F2,R43,Q14,Q10.
Bottom : Relocate the following part on the top of the board here: MAP sensor
TOP :There is no need to move parts on the V3.57 but D22 is the flyback diode for the fidle output. Some prefere to remove it and relocate it under the board to the DB-37 #30 and #26(12V) here.
Bottom : Relocate the following part on the top of the board here: MAP sensor.
Here the connector side pin identification. Here the PCB foot print with parts location and here the 4 coil dirver.
The board installed on the megasquirt board and the finished nice setup
Low profile red box enclosure with black anodized and laser cutted enplates.