Supercharged111
Truly Awesome
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We can take it a step further: a transistor is also like a relay, but can only handle enough current to fire off a relay coil, so it could be the ground for 85/86. My only experience with this was with an SDS standalone engine management system. In order to drive the ignition system I wanted to, I had to solder in 2 transistors. They each had 3 pins. The computer would apply power to the first pin which meant current could then flow across the other 2. This closed the circuit for the ground on a relay coil, and finally the relay itself (30/87/87a) could carry the real juice.