Soft start circuit

mesa232323

Enlightened
Joined
Nov 5, 2008
Messages
340
Location
bakersfield, ca
Need diagram or instructions on how to make a circuit that runs resistance with a resistor for a few seconds before automatically switching to direct drive. It will switch back to using the resistor everytime it is fired.
The circuit needs to be small enough to fit in a small circuit board that will fit in the tail cap under the spring. I plan on making a circular circuit board under the spring isolating the ground as I will be controlling the current through the ground. I will be using this with a 6D mag and a philips 5761.
 

mesa232323

Enlightened
Joined
Nov 5, 2008
Messages
340
Location
bakersfield, ca
I eventually figured out a circuit. All I needed was an 8 amp, 1 ohm thermistor. I was able to power a Philips 5761 on 6x D NIMH without flashing the bulb on freshly charged cells.

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alpg88

Flashlight Enthusiast
Joined
Apr 19, 2005
Messages
5,282
you need inrush current limiter, digikey sells those for like few bucks, i used one with wa1185,
 
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