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September 27, 2010
This circuit is intended to let the user turn off a lamp by means of a switch placed far from bed, allowing him enough time to lie down before the lamp really switches off. [more]
circuit from:http://www.extremecircuits.net/2009/06/courtesy-light.html
September 27, 2010
The basic circuit illuminates up to ten LEDs in sequence, following the rhythm of music or speech picked-up by a small microphone. The expanded version can drive up to ten strips, formed by up to... [more]
circuit from:http://www.extremecircuits.net/2010/01/dancing-leds-circuit-diagram.html
September 27, 2010
Men in particular enjoy the convenience of television remote controls – often to the annoyance of their female partners. Men apparently want to know what they’re missing when the TV is tuned to a particular... [more]
circuit from:http://www.extremecircuits.net/2010/04/ir-infrared-detector-circuit-diagram.html
September 27, 2010
This device allows one or more lamps to illuminate at sunset and turn off at dawn.Q1 and Q2 form a trigger device for the SCR, providing short pulses at 100Hz frequency. Pulse duration is set... [more]
circuit from:http://www.extremecircuits.net/2009/06/dark-activated-terrace-lamp_19.html
September 27, 2010
This circuit is usable as a Night Lamp when a wall mains socket is not available to plug-in an ever running small neon lamp device. In order to ensure minimum battery consumption, one 1.5V cell... [more]
circuit from:http://www.extremecircuits.net/2009/07/battery-powered-night-lamp.html
September 27, 2010
This low-cost short-wave transmitter is tunable from 10 to 15 MHz with the help of ½J gang condenser VC1, which determines the carrier frequency of the transmitter in conjunction with inductor L1. The frequency trimming... [more]
circuit from:http://www.extremecircuits.net/2010/05/simple-short-wave-transmitter.html
September 27, 2010
It sounds rather mysterious: a switch that is controlled by its ambient temperature. All without the touch of a human hand, except for when you’re building this sort of electronic thermostat. There are a lot... [more]
circuit from:http://www.extremecircuits.net/2010/04/temperature-controlled-switch.html
September 27, 2010
Capacitive touch sensors are based on the electrical capacitance of the human body. When, for example, a finger comes close to the sensor, it creates a capacitance to Earth with a value of 30 to... [more]
circuit from:http://www.extremecircuits.net/2010/05/simple-capacitive-touch-sensor.html
September 27, 2010
This stereo FM wireless microphone also makes a great quality audio link. We tested it to beyond 50 meters and it was rock solid. It’s certainly not the first wireless microphone we’ve ever published but... [more]
September 27, 2010
This circuit was intended to activate a relay by means of a hand clap. Further claps will turn-off the relay. An interesting and unusual feature of this project is the 3V battery operation. The circuit's... [more]
circuit from:http://www.extremecircuits.net/2009/07/clap-sensitive-on-off-relay.html
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