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Archives for October, 2012

Scoreboard circuit

Scoreboard circuit using 7447, 74192

Circuit 2N2222

Circuit 2N2222 for Headphone amplifier This circuit can source about 500mA continuously, You built a 2 transistor project and it worked great, but now it has stopped working. You decide the transistor may be faulty.

Alarm Car Cmos 4060 schema

Alarm Car Cmos 4060 schema The area to be monitored is connected via a cable and allows remote audio listening. You can use this in your garden and listen for any unusual sounds, or maybe just wildlife noises. If you have a car parked in a remote location, the microphone will also pick up any […]

Need a VHF/UHF TV signal amplifier schematics diagram? should have a high gain with low noise?

Nish asked: some websites give details with out the schematic digram or ask money for the diagram. (eg. www.ramseyelectronics.com give full details other than the schematic diagram, which is a must when building a circuit as a beginner)

Current Sensing Slave Power Switch using Relay

Current Sensing Slave Power Switc using BC549, BC556, relay

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