[Diy_efi] Photocouplers

[bcroe at juno.com]

If you have a single opto input diode, put a second diode 
in parallel with it but wired the other way.  This will short 
out any reverse voltage spikes that come through the 
resistor without breaking down the photo diode.

Bruce Roe

24 Feb 2003 Tony Petroski <tp11 at uow.edu.au> writes:

> The reverse spike supression. I would like a link to an example
> circuit that explains this theory.

> tony

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