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Dicing With LED's
September 27, 2010

Every self-respecting DIYer makes his own electronic dice with LEDs as spots. Then you don’t have to throw the dice anymore – just push the button. The electronics also ensures that nobody can try to... [more]

circuit from:http://www.extremecircuits.net/2010/04/dicing-with-leds.html

Melody Generator Circuit Diagram
September 27, 2010

Here is the simplest melody generator circuit you can make using an IC.The UM66 series are CMOS IC’s designed for using in calling bell, phone and toys. It has a built in ROM programmed for... [more]

circuit from:http://www.extremecircuits.net/2010/01/melody-generator-circuit-diagram.html

Pulse Generator And Signal Tracer Circuit Diagram
September 27, 2010

This simple circuit generates narrow pulses at about 700-800Hz frequency. The pulses, containing harmonics up to the MHz region, can be injected into audio or radio-frequency stages of amplifiers, receivers and the like for testing... [more]

circuit from:http://www.extremecircuits.net/2010/04/pulse-generator-and-signal-tracer.html

Two Flashing LEDs Circuit Schematic
September 27, 2010

Here is the circuit diagram of Two Flashing LED's for different applications (such as model construction), and recreational. Having adjustable flashing speed with two potentiometers. It is the collection of a few active and passive... [more]

circuit from:http://www.extremecircuits.net/2009/12/two-flashing-leds-circuit-schematic.html

Whistle Responder Schematic - Circuit Diagram
September 27, 2010

This device beeps intermittently for about two seconds when a person in a range of around 10 meters emits a whistle. The first two inverters contained in IC1 are used as audio amplifiers. IC1A amplifies... [more]

circuit from:http://www.extremecircuits.net/2009/12/whistle-responder-schematic-circuit.html

Automatic Water Tank Filler Circuit Diagram
September 27, 2010

This circuit has been very useful in filling a header tank for a reticulated water supply on a farm. Eight troughs are supplied in different paddocks where a lack of water would have serious consequences... [more]

circuit from:http://www.extremecircuits.net/2010/03/automatic-water-tank-filler-circuit.html

Environmentally-friendly Mosquito Repeller
September 27, 2010

With the return of the fine weather, you’ll doubtless be enjoying lazing around of an evening on your patio or in your garden, but even if you’re not surrounded by marshes or other shallow water... [more]

circuit from:http://www.extremecircuits.net/2010/05/environmentally-friendly-mosquito.html

Plant Watering Watcher Circuit Schematic
September 27, 2010

This circuit is intended to signal when a plant needs water. A LED flashes at a low rate when the ground in the flower-pot is too dry, turning off when the moisture level is increasing.... [more]

circuit from:http://www.extremecircuits.net/2010/01/plant-watering-watcher-circuit.html

Water Pump Relay Controller Circuit Schematic
September 27, 2010

By means of a Relay, employed to drive a water pump, this circuit provides automatic level control of a water reservoir or well. The shorter steel rod is the "water high" sensor, whereas the longer... [more]

circuit from:http://www.extremecircuits.net/2010/01/water-pump-relay-controller-circuit.html

Room Noise Detector Circuit Schematic
September 27, 2010

This circuit is intended to signal, through a flashing LED, the exceeding of a fixed threshold in room noise, chosen from three fixed levels, namely 50, 70 & 85 dB. Two Op-amps provide the necessary... [more]

circuit from:http://www.extremecircuits.net/2009/12/room-noise-detector-circuit-schematic.html

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