Labels:text | font | black and white OCR: A BUILD A LINE RELAY CONTACTS . N.C. OLCOMMON TO WALI 5 mfd. 0 SOCKE - 1400 V N.O = TO RED AND GREEN CAPACITOR RELAY PHONE LINE WIRES COIL B GE 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 contacts of the relay can operate any circuit The phone ringing is 90 volts AC , often superimpos- 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 t ...
