12v --→ 10Kohm --→ Vin ( to power arduino ) GND --→ car negative
Vtec controller
Signal from distributer linked to pin 4 & through 160ohm resistor GND
Distributer ---{220ohm}-----pin4
\--{100ohm}---GND pin
LEDs: Common ground pin, 220ohm on positives, pins 9, 10, 11, 12 GND → LED → reistor → pin
Vtec control pin 3
Tachometer output: Connect CLK to 5 Connect DIO to 6