Labels:text | letter | font | black and white | ink OCR: A BUILD A LINE RELAY CONTACTS N.C. TO WALI 5 mfd. FoCOMMON SOCKE- RG N.O TO RED AND GREEN CAPACITOR RELAY PHONE LINE WIRES COIL B Gt The Line Relay is a simple yet interesting device you it the relay will draw a dial tone even with the phone can put on your phone line. It will do almost anything on-hook. The capacitor should be non-electrolytic, you want when your phone rings, such as turn on a and as many microfarads as possible; 5 should do light, answer the phone, turn off your stereo, etc. We will show some extension projects in future issues. nicely. The phone ringing is 90 volts AC , often superimpos- The contacts of the relay can operate any circuit ed on 45 volts DC. This 90 volts will operate a 115 V you want. The diagram shows how the normally- AC relay, which can in turn supply ...
