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Old 07-25-2017, 06:41 PM
out2kayak out2kayak is offline
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I am looking into this for my '67, though I have an LT4 with a 8L90E transmission.

What I'm looking into is a custom board with something like:

https://www.scantool.net/stn2120/?ut...=stn2120-order

(example circuit: http://www.image.micros.com.pl/_dane...stn2120iml.pdf)

Tie this to with a microcontroller and a motor and you have a way to drive legacy speedometer. The circuit would be something like:

https://electrosome.com/dc-motor-speed-control-pic-pwm/

-- or --

http://www.ibrahimlabs.com/2013/07/p...4-dspic33.html

Serial on a PIC is pretty easy. The interface to the STN2120 is serial, so then its a matter of receiving the speed message from the transmission and spinning the motor at the correct speed driving the speedometer.

What are you going to do for the other sensors (like oil pressure, fuel, etc.)? Are you going to try to drive the dash warning lights? I've been eyeing something like a MicroOLED MDP03 to see if I can fit it in the spaces for the lights, then having a nice, flexible display.

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