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Posts tagged phone

8800 phone

Nokia 8800 phone radio module / circuit using TEA5761UK Nokia 8800 phone radio module / circuit using TEA5761UK

Headphone amplifier ic

Headphone amplifier ic circuit using TL072, BD139, BD140

Audio Stereo

30w tda1521 Audio Stereo circuit diagram Audio Stereo using TDA1521 pcb design Audio Stereo using TDA1521 pcb design

Intercom switch circuit

Intercom switch circuit Intercom switch circuit Two line intercom plus a telephone changeover switch Click here for the circuit diagram. The circuit presented here can be used for connecting, The circuit presented here can be used for connecting two telephones in parallel

Constant high current regulator – circuit modules

Constant high current regulator – circuit modules using BD140, 555, 3041, BC546, 4060 Constant-Voltage Constant-Current Battery Charger – BD140, 555, 3041, BC546, 4060

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