S2000 Cluster in 86 Corolla ?? pro's plz

[thanhngo]

Nice, drools at equipment - you should have no problems building this. Did your rpm start flashing when it hits 9500rpm?

I'm doing the wiring on the car atm to hook up to the 20v engine. Gonna connect the Tacho soon and running off 1/4 IGF signal from the COPs. Thinking:
Signal -> Schmitt trigger -> freq multiplier x 4 -> Logic Mofset - > Tacho

Sorry I don't have diagrams etc as I've been doing it mostly on the breadboard and blindly trying it

Speedo:
VSS sensor - > Schmitt trigger -> Controller -> Freq Divider -> Tacho In
* need a RC filter to remove noise at higher speeds
* incorporated 2 trimpots to adjust speedo for changes in tyres/diff ratios/gearbox etc
* Frequency Divider used to overcome hardware limitations/resolution of pwm signals of 10bit freq

ECT:
ECT -> Controller (ADC) -> temp gauge
* couldn't figure out a way to use single wire as I think the factory uses a Capacity so I used 2 wire toyota thermistor used wired in voltage divider with 51R

Toyota Thermistor recordings
Temp ADC (heatup) ADC (Cool down) ADC (Sustain)
60 55 78 73/76
65 62 89 83/87
70 73 103 97/98
75 86 117 111/112
80 102 133 125/129
85 116 149 142/143
90 135 165 162
95 154 180 177
100 172 193 196
105 225 217/219
110 239