Re: [ATM] Electronics help needed - temperature control

["Don Clement" <clement.focuser@verizon.net>]

Kevin,



Perhaps you would design and build a differential temperature control
circuit using the 1N34 germanium diode. Post it up on the web for other TNs
to use for controlling fans or automatic dew prevention.



Don Clement







> Silicon isn't as cheap for the amount of temperature
> differences we're talking about here.  Silicon doesn't
> vary as much as germanium.  The 1n34A diode (40 cents?
>  Less?) is very cheap and predictable.  Besides, once
> the temperature equalizes, you can flip a switch that
> transfers the energy from the temperature sensor
> system to a crystal radio, and tune in to a few AM
> stations while you observe.  1n914's don't do that as
> well. <weg>
>
> Kevin
>

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