[GreenKeys] Loop supplies, or how to drive a selector magnet.

[tony.podrasky]

Ummm - the appropriate sized resistor in the loop to limit the current
to 20ma, with a toggle switch to short it out when not needed?

UE,
K2EAA - TONY
NNNN
ZCZC

On 05/20/2016 08:00 AM, Lester Veenstra wrote:
> In view of the wide variation in possible loop configurations, from just
> a set of keyboard contacts with no resistance to a Model 19 with lots of
> resistors and Polar relays, I still think there should be some dynamic
> way (pot or active device) to set the loop to 60 or 20 ma.
>
> /Lester B Veenstra  MØYCM K1YCM W8YCM///
>

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