Strobe light phone indicator

[Keith]

Does anyone have a schematic for once of those strobe circuits that will
flash when the phone rings. I want to make one for my workshop where it's
very noisy at times and I don't hear the phone.

Thanks

Keith

 

[gothika]

On Sat, 21 Feb 2004 17:33:00 GMT, "Keith" <salmo@nf.sympatico.ca>
wrote:

Does anyone have a schematic for once of those strobe circuits that will
flash when the phone rings. I want to make one for my workshop where it's
very noisy at times and I don't hear the phone.

I'm not sure if the voltage is still the same for the ringer signal(it

used to be around 24volts peak. correct me if I'm wrong)
I've seen where some have wired directly off the ringer circuit and
used low voltage lamps with a red dome for this purpose.

Thanks

Keith

 

[Watson A.Name \"Watt Sun]

gothika wrote:

On Sat, 21 Feb 2004 17:33:00 GMT, "Keith" <salmo@nf.sympatico.ca
wrote:


Does anyone have a schematic for once of those strobe circuits that will
flash when the phone rings. I want to make one for my workshop where it's
very noisy at times and I don't hear the phone.


I'm not sure if the voltage is still the same for the ringer signal(it
used to be around 24volts peak. correct me if I'm wrong)
I've seen where some have wired directly off the ringer circuit and
used low voltage lamps with a red dome for this purpose.

You're wrong. The ringer current is 90 VAC superimposed on the 48VDC
and it's about 20 Hz.

Thanks

Keith

 

[Watson A.Name - \"Watt Su]

"Keith" <salmo@nf.sympatico.ca> wrote in message
news:gDMZb.101940$IF6.2999416@ursa-nb00s0.nbnet.nb.ca...

Does anyone have a schematic for once of those strobe circuits that
will
flash when the phone rings. I want to make one for my workshop where
it's
very noisy at times and I don't hear the phone.

Thanks

Keith

Go to Radio Shack and buy one. They're reasonably priced.