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Pepper spray - equivalent diodes and transistors

Started by Gialli, February 06, 2014, 04:23:52 PM

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Gialli

Hi, which equivalent can I use for 1n695 diodes and 2n404a transistor?
The insanity lies in doing the same thing expecting different results

Stomptown

I've used various germanium diodes with good results. Look for diodes with a forward voltage between 250 and 350 mV. Not sure about the transistor but my understanding is that any low gain "junk" transistor will work. IIRC it doesn't even matter if it is leaky...

midwayfair

You can use any low gain PNP. Anything between 30 and 70 hfe will be fine.

1N696 diodes have a typical forward voltage of 0.25V-0.275V, depending on the manufacturer. Realistically, almost any germanium diode will be fine, but the following will measure close enough:
Germanium:
1N60
Almost every russian detector diode (D9E, D9B, D9V, etc.)
1N192
1N270 (may be a little high)
Any of the Smallbear generic diodes, which are mostly 1N1xx
You can also just use the 1N34A. The Fv isn't critical in this circuit at all.

Not germanium:
1N60P
BAT43
BAT85
Several other schottky diodes ...

Per

Gialli

The insanity lies in doing the same thing expecting different results