09-21-2016, 05:36 AM
if you look close the reduction goes 5: 1 more at the top of the 10k before the ECU sees it, The ECU will not like over 5vdc at any time. so.... all inputs are protected.(to a degree)
if you stuff high voltage (even 3 or 6 or 9v or 12v,) onto the base of a NPN transistor, it burns it up. The R1 is there to keep coil OFF , ECU pulled.
the ECU drives the base of the igniter with resistors to prevent damage to the ignition. the current is limited i most cases to under 10 mA, (most hand held batteries can exeed that easy) sorry, but is a fact.
to bench fire my ignitor , I used a 500 ohm resistor to at 5v supply, and can fire the ignitor and coil together.
if you stuff high voltage (even 3 or 6 or 9v or 12v,) onto the base of a NPN transistor, it burns it up. The R1 is there to keep coil OFF , ECU pulled.
the ECU drives the base of the igniter with resistors to prevent damage to the ignition. the current is limited i most cases to under 10 mA, (most hand held batteries can exeed that easy) sorry, but is a fact.
to bench fire my ignitor , I used a 500 ohm resistor to at 5v supply, and can fire the ignitor and coil together.
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