On Tue, 25 Jan 2011 22:37:50 +0100, "Wolfgang F. Gaerber"
wrote:
Am 25.01.2011 22:13, schrieb 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.
Suggestions?
...Jim Thompson
You can hook up to 3 or more phones in parallel on the line. (so there´s
enough power)
Using the capacitor+ringer from an old phone would be enough.
What's an old phone ?:-) I can't recall having one die... except for
the wireless types.
You have up to 60vpp on the line during ringing.
Imporant is that you shouldn´t build a DC path in parallel.
You can use (AC ring+capacitor in series) in parallel or capacitor +
rectifier + DC ringer.
Anywhere to just buy the ringer?
Though I guess just buy a cheap Chinese-made phone and gut it ?:-)
...Jim Thompson
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