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Reply to "Need a Little Help with a DipTrace Schematic Please"

stan2004 posted:

Rod, looks good to me.  Though I see this version does not have trim adjustment for flashing speed.

Good catch Stan. I just picked up a pair of mosfets at the local electronics jobber, so I will test it out on the breadboard. If it looks like a trimmer pot would be advantageous its easy enough to add. They did not have the IRFZ44 in stock, so we subbed a pair of IRF540's, made by Vishay instead of IR. One thing that worries me a little about the specs on both is that they show the gate-source voltage Vgs as 2 volts min, 4 volts max. Does this mean that the 12 volt gate voltage in my circuit is going to fritz them? Or am I interpreting this wrong?

Rod

OGR Publishing, Inc., 1310 Eastside Centre Ct, Suite 6, Mountain Home, AR 72653
800-980-OGRR (6477)
www.ogaugerr.com

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