would like some advice (control the discharge of a photoflash cap with a microcontroller) / General Science and Electronics / Forums

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would like some advice (control the discharge of a photoflash cap with a microcontroller)

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LAN_403

notafakeninja

Thu Jul 24 2008, 08:46PM

Registered Member #1550 Joined: Tue Jun 17 2008, 04:46PM
Location:
Posts: 8

I'm new by the way.

Umm, this may seem stupid, but I have no idea how to control the discharge of a photoflash cap with a microcontroller without the microcontroller fragging on me because of the fact that the microcontroller can't handle that much voltage. I'd like the microcontroller to control how many are discharged...and could someone point me in the right direction to charging multiple with a 9V on a circut without over or under charging them. Just so you know, I ead a bunch of tutorials and they didn't help me out at all with this problem

help or links to help would be appreciated

rp181

Thu Jul 24 2008, 09:46PM

Registered Member #1062 Joined: Tue Oct 16 2007, 02:01AM
Location:
Posts: 1529

you have to use a SCR. The controller gives a signal to the gate of the SCR, allowing it to conduct the larger power.

cjk2

Fri Jul 25 2008, 04:29AM

Registered Member #51 Joined: Thu Feb 09 2006, 04:17AM
Location:
Posts: 263

I would think about using an optoisolator driving an SCR or similar. Microcontrollers are very sensitive to voltage spikes.

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