[Cryptech Tech] Alpha Avalanche Noise Block

[Fredrik Thulin]

On Friday, April 10, 2015 01:07:21 PM Павел Шатов wrote:
> Hello!
> 
> Fredrik, I've attached my variant of power supply regulator for an
> updated version of avalanche noise block. It will output stable +12V
> with input voltage starting from around +7V and up to +18V. If +12V is
> not enough, you can increase value of R1 to trim output voltage. It
> would be great if you could update schematics when you have time.

Great, thank you. I'm planning on doing some Cryptech catch up this weekend.

Would it be possible to lower the required input voltage to +5v? That way I 
could use this same circuit with my USB based test units.

> As far
> as I remember, we also decided to replace hex Schmitt trigger with
> smaller one-gate variant (74HC1G14). After your measurements, we also
> found out, that protection bus transceiver is not necessary.

Yes.

/Fredrik