Jim Thompson wrote:
On Tue, 25 Jan 2011 14:13:47 -0700, Jim Thompson

Anyone have a favorite circuit for a remote telephone ringer?

I have access to the phone line, but no close-by source of power, so
telephone line-powered or low battery drain.

Commercial purchase also OK.

Solved. Bought 10 units (five phone locations, 2-lines) from Hong
Kong at $5 each. Loud!

Next problem:

I need a circuit that closes a relay after X rings, X adjustable.

As before, line-powered preferred.


Uh, presettable CMOS counter, and a battery for the relay?

By "line-powered," I presume you're talking about the telco's 48V?
You can't draw very much power from that at all, or they'll start
investigating for faults in their trunks. And, of course, they'll
trace it to you. :-

Good Luck!
Rich