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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

no picture and audio on my TV?

Bernardo B asked: there is no picture and audio on my TV when i turn-on my TV, but there’s a sound thuk from the speaker when i plug-in the supply cord. i tried to open the back of the TV to check if the fuse is ok and it seems to be good. i trace […]

The easy way to detect the tv remote is damaged or not

The easy way to detect the tv remote is damaged or not 1. make sure the Battery is still good. 2. use a cell phone camera or your digital camera. 3. remote sensor faced the camera cell phone or your digital camera. then press the button on the remote while it then there will be […]

LM555 Circuit Monostable Timers part 15

LM555 Circuit Monostable Timers part 15

PreAmplifier circuit diagram using BC546, BC556

PreAmplifier circuit diagram using BC546, BC556 Preamplifier parts: P1 10K Linear Potentiometer P2 10K Log. Potentiometer R1,R2 68K 1/4W R3 680K 1/4W R4 220K 1/4W R5 33K 1/4W R6 2K2 1/4W R7 5K6 1/4W R8,R18 330R 1/4W R9 47K 1/4W R10 18K 1/4W R11 4K7 1/4W R12 1K 1/4W R13 1K5 1/4W R14,R15,R16 100K 1/4W […]

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