Newest circuit diagrams
The first circuit was designed for the situation where a hijacker forces the driver from the vehicle. If a door is opened while the ignition is switched on - the circuit will trip. After a few minutes delay - when the thief is at a safe distance - the alarm will sound and the engine will fail.
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This circuit has an exceptionally fast high frequency response,as demonstrated by applying an 100kHz squarewave to the input.
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Clap sensitive on-off Relay. 3V Battery operated, small portable unit
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Beeps when hears your whistle. A gadget suitable for key-holders, games etc.
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In his circuit Marin has used two transistors wired as a high gain compound pair.
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LED sequencer: follows the rhythm of music or speech. 9V Battery-operated portable unit
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Indicates the basic integrity of a printed board. Self-powered - 3 to 30V range.
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Water reservoir automatic level control. Simple circuitry - 12V supply
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Linear scale - Small size. 40 to 208 beats per minute
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Power supply with variable voltage and fixed current regulation made using the ubiquitous L200C regulator.
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