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Free Download TDA7294 IC Second Voice recorder module and Service Manual free download, schematics, datasheets, eeprom bins, pcb

Free Download PDF TDA7294 IC Second Voice recorder module and Service Manual free download, schematics, datasheets, eeprom bins, pcb TDA7294 IC Second Voice Recorder Module. Non-volatile multi message recorder using ISD chips. Just change one resistor for longer duration. Standalone operation using just six onboard bottons. Record via built-in microphone or external line in. Speaker […]

Time Delay Circuit Diagram

Time Delay Circuit Diagram using 1N4007, 2SC2008, 2SA953

Echo Repeater circuit

Echo Repeater circuit using IC AN6551, MN3005, MN3101 and TR C536 Echo Repeater circuit using IC AN6551, MN3005, MN3101 and TR C536

Power compo audio circuit

Power compo audio circuit using LM1875

Motion alarm sensor using LM7215, ZVN4306

Motion alarm sensor using LM7215, ZVN4306 Motion alarm sensor using LM7215, ZVN4306

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