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Posts tagged BC2121

Headphone amplifier diy circuit

Headphone amplifier diy circuit using BC2121, 2N3906, MJ480

More circuit headphone amplifier

More circuit headphone amplifier using IRF610

Audio Amplifier Circuit using STK0029

Audio Amplifier Circuit using STK0029

consumer goods why arnt they repairable?

steve50 asked: many years ago as a tv man i could repair many tv’s in customers houses there were known brands and real wood cabinets some even came with circuit diagrams in the box. now they are all made in foreign lands no circuits and if a main part has gone its scrap time even […]

home alarm systems

home alarm systems home alarm systems using CCTV Camera Auto Electronic Shutter Control Auto Switch CCTV Camera Auto Electronic Control Auto Switch circuit diagram CCTV switch circuits using 555, 74HC14, 4017, 2N2222 home alarm systems cameras installed at different locations in the city have been dismounted following the home and looking for CCTV camera and […]

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