So I'm trying to make a circuit to make a phone ring and ideally stop ringing when the handset is picked up.
I put to together this circuit:
http://www.techlib.com/electronics/telephone.htmlI'll attach my Element14 parts list as soon as the site comes back up...
But it only seems to power the phone because I can hear myself blowing into the mic but it doesn't ring. I think the problem is being caused be something on the first inverter, all of the others are reading + or - 12v except for that one which is fluctuating between 5-15v. The output to the phone is 12v no fluctuating at all.
I'm also kinda confused with the transformer I got, a Hammond Manufacturing 166G9,
http://www.mouser.com/ds/2/177/5c0018-19-57926.pdf, it has three wires on one side that I don't really know what to do with and the data sheet mentions a rectifier so I'm not sure if that means its built in or not.
Thanks in advance for your assistance.