QUASAR CODES 3140 - DTMF Telephone Relay Switcher
Page
7
Страница 1: ...perated equipment complies with these safety hints Use a suitable plastic enclosure If a metal enclosure is used make sure it is properly earthed Use a power switch if the device consumes more than 10...
Страница 2: ...d DTMF digit is detected the 4 bit code is placed on pins 11 14 and a data avaliable output pin 15 is set to a logic high The output relays RL1 4 are controlled via the relay driver IC6 One output fro...
Страница 3: ...w quasarelectronics com jpg 3140_2 jpg PRE TESTING Insert IC7 MAX666 and connect a 12 15Vdc power supply to the DC input jack Use a multimeter to check the 5V supply Easiest place to measure this is a...
Страница 4: ...this feature is disabled the unit expects the the call to be answered externally eg by an answering machine Everything else works as normal including entering a valid password The only difference is...
Страница 5: ...lder BT wiremen is often approaching art in its perfection The BT Drop Cable The cable coming from the outside world This often has Orange White Green and Black wires Usually but not always Orange and...
Страница 6: ...5V electrolytic C9 1 Semiconductors 1N4004 diode D1 2 3 3 1N4148 D4 1 WO2 B1 2 3 3 Diode bridge MJE340 NPN transistor Q1 1 MPSA42 NPN transistor Q2 1 CM8870 datasheet from California Micro Devices www...
Страница 7: ...t we sell A relay is an electrically operated on off switch The voltage and current limits specified in the product documentation generally relate to resistive or light inductive loads Relay Terminals...
Страница 8: ...QUASAR CODES 3140 DTMF Telephone Relay Switcher Page 7...
