Hi Russell.

Did you measure how fast it can switch FET on and off ?


WBR Dmitry.



> 'My' (time honoured) circuit will meet most needs well and cheaply.
> Parts count per channel - 2 x small NPN, 3 x R, 1 x Z, 1 x D,1 x cap
> (optional).
> Very amenable to SMT implementation.
> 
> See recent post for notes.
> 
> I'll post it again - 'only' 3K.
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