Ignition questions & the Nat semi Injector driver

[Jim Staff]

> 
> I used a TIP152 400v 7.5 amp darlington. (and a balasted coil)
> Thats it. The TIP152 has an internal clamp for reverse voltages
> and I guess the transistor soaked up the positive spikes.
> 

The balast was put there to act as a currecnt limiter correct?  I Don't have 
access to something like that... I have access only to more normal electronic 
parts.. What kind of Volts and Amps could i expect? I can get resistors that are
very heavy duty, also I found a diode that could block the mississippi, from 
haris. 1000V @ 150amps!!!!

Also SGS thomson has automotive ignition transistors, that are 400V @ 15amps, 
and carry internal protection.

About the tip 120, I've got a good supply. (Radio shack 1 mile away) It also 
carries internal protection for reverse voltage and high voltage (It's only 60V 
max), of course I maybe able to slide by on luck and a handfull in case I blow 
one!

      Jim Staff