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Showing posts from February, 2020

Adjustable power supply

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0-25V 0-3A adjustable power supply Parts Lm350 D313 22Uf 220ohm In4007 2k preset 10K preset

Remote controll fire cracker

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Reciver circuit Transmiter circuit Relay circuit

Metal detector 555

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Metal detector Parts 1K                           0.01uf       NE555*2 100k                       0.0027uf  Bc547 470oms                  100uf       Buzzer 2m                          470uf       26swg coil 100k-control-2 20k-control 10k

Siren circuit

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3 Tone siren Police Fire Ambulance Parts list    D400              1uf-1 270K-1        bc548-4         10uf-2 33K-1          A933-2           103-3 3.3K-3                                22K-1           LED-1 1k-1              1w sp 100k-1 27k-2 470k-1 470 oms-1

Ultrasonic sensor with 555

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Ultra sonic sensor  with ne555 timer ic sercuit diagram Ultra sonic  sensor Parts Ne555 1k 10K control 3.3Pf 10Uf

Power guard circuit

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230V under an over voltage protection