Re: VK3YE AGC pcb.


MVS Sarma
 

LDR and LED can better be tucmed into a small black tube. That helps intercerence from external lighting.


On Wed, 25 Jul 2018 6:35 PM Dexter N Muir, <dexy@...> wrote:

It may have been done before: an opto-coupler driven in a linear-transfer range ... ? Certainly smaller and less susceptible to ambient light (opening housing, etc. ... Just alter a few resistor values here and there ... may also be more readily available: scrap an old PC power supply.
73
Dex, ZL2DEX

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