[sdiy] Fast optical device to replace slow responding LED/LDR combo.. ??

pata at ieee.org pata at ieee.org
Tue Jun 18 16:37:44 CEST 2024


Hi Jean-Pierre & the List!

I recommend H11F1, F2, F3 series originally from Fairchild.
Their secondary stage is photo-FET.
I can use it simply replace LED-CdS photo couplers but 10 - 100 times faster.
Unfortunately they are already discontinued, but still some suppliers selling.

Regards,

Taku, a.k.a. Pata 
Muse Music Synthesizer Laboratory, Japan 

> 2024/06/18 23:23、Jean-Pierre Desrochers via Synth-diy <synth-diy at synth-diy.org>のメール:
> 
> 
> Is there any device that could replace a slow responding LED/LDR combo ?
> I was thinking of this LED/photo transistor/bridge replacement..
> The only thing to be carefull about would be the diodes voltage drops,
> But using very low current that voltage drop could be very low..
> Hmmm..
>  
>  
> <image003.jpg>
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