Re: Any use of a battery eliminator/charger device?
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Yes, The 7809. It requires at least 3 volts input higher than the output as I remember .
I have used several of this series in various regulator applications and as current sources.
Old technology but reasonable cost.
I usually add the protective diodes to the regulator as depicted in many schematics.
Dr. Don W4BWS
Ego is the anesthesia that deadens the pain of stupidity.
On Tue, Feb 6, 2018 at 1:37 PM, Frank Perkins <N6CES.r@...> wrote: