It is a crowbar circuit for transient voltage suppression. Works very well and keeps the other electronics spike free.klotzy_550 wrote:Thanks for the quick reply!
Could you explain the reason for the resistor on the source? and the purpose of the diode? is it to ensure the voltage remains in a certain range or to prevent unwanted feedback on the digital pin?
From the research I did on it, using an IGBT for an injector driver (to increase parts commonality, lower unit price) is not as efficient as using a mosfet to control the lower voltages. http://www.irf.com/technical-info/white ... wisely.pdf provides good information on this.PSIG wrote:While not as individually economical (offhand 15-20A at $1.15 ea); would using an IGBT be a lower parts count (no TVSs) and possibly interchangeable with ignition parts for lower cost as well? Just thinking out loud. Dangerous.
klotzy_550 wrote:Thanks again, that makes more sense now! That is what I was figuring with the diode, never seen that before with the diode on the source. However, this is exactly what I was looking for!
I can send you a board if you like to play with it.klotzy_550 wrote:klotzy_550 wrote:Thanks again, that makes more sense now! That is what I was figuring with the diode, never seen that before with the diode on the source. However, this is exactly what I was looking for!
In my case the clamp is behind the fuse so the[…]
ah i see, so the only options that i have is the […]
Good afternoon, test the vvt map leaving off "[…]
It is completely possible to just do it though. […]