Subject: From: Date:

Re: [ECS] Telephone Deadman switch Dan Carrington Thu, 27 Aug 1998 07:38:52 -0700

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I have looked in my big book of electronic parts and it seems that
voltage regulators allow input voltages up to about 35 volts.  If the
phone system runs at 48 vdc and rings at 90 vac, any ideas as to how to
limit the voltage that ends up at the regulator so as to not blow the
thing?

Dan Carrington




Daniel Dubay wrote:
> 
> I bet it would work.  Let us know.
> 
> Dan Dubay
> 
> >>> Dan Carrington <dc_grafx@microworks.net> 08/26 3:16 PM >>>
> How about a regulator that puts out 5 volts that I could then directly
> sense with a digital input with basically no current draw?
> 
> Dan

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