IR Emmitter for Flash Slaves

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tkerby

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Joined
Jan 4, 2005
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Location
Edinburgh
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Hi
Does anyone have a schematic for an IR emmitter (like the Wein metermate) suitable for use for triggering flash slaves. I have a bunch of IR leds lying around and I'm keen to make one.

I'd also like it to work as a slave repeater and with scr based electronic flash triggers in the more modern light meters so it must provide power to the camera/meter/slave at all times to allow them to slowly bleed power to charge their capacitor.

Because of this, a simple series circuit cannot be used as the LEDs have a threshold before they turn on and as such no current would flow when a triggering device needs to bleed power for itself

Any links appreciated. I'm thinking some sort of Potential divider, 555 monostable and power transistor....
 
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