I found this USB module that claims to work with all microcomputers so I ordered one.
 Some of the guys are using these with megasquirts.

 Kind of stupid putting a RS232 on there to generated a lot of weird voltages you
 don't need. The module only cost $15. I would probably have that in chips, caps and
 DB9 connector. It is shown in the lower right corner. The board is still 3.8 inches
 by 2.5 inches 3 for $50. The hardware PWM generator, injector drivers and FETs are on
 the right. The external 10 Mhz clock is the lower center. There is a divide by 1024
 chip that gets it down to below 10K for the RPM count. There is also a CD4049 that
 conditions the CAS for the 22 degree BTDC interrupt once per rev.

 The board is a cross between a bread board and a final design. I am going to
 experiment and find out what ports work for what.

 Paul Lamar

Paul,

The cable I sent you for reading data from EC2 is the same. In fact it
does not have RS-232 protection and uses TTL levels so you can connect
this directly to your computer. I only connected TXD, RXD and Ground
on it.

Henry

You sent me a cable? I found a USB module and I am using that.

Paul Lamar


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