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October 2, 2010
This circuit is designed on request and can be useful to those whishing to have, say, a red LED illuminated when an appliance is on and a green LED illuminated when the same appliance is... [more]
October 2, 2010
This ultra-bright white LED lamp works on 230V AC with minimal power consumption. It can be used to illuminate VU meters, SWR meters, etc. Ultra-bright LEDs available in the market cost Rs 8 to 15.... [more]
circuit from:http://www.extremecircuits.net/2010/05/ultra-bright-led-lamp.html
October 2, 2010
This circuit shows how to use an ordinary LED as a light sensor. It makes use of the photovoltaic voltage developed across the LED when it is exposed to light. LEDs are cheaper than photodiodes... [more]
circuit from:http://www.extremecircuits.net/2010/05/using-led-as-light-sensor.html
October 2, 2010
It’s entirely logical that low-cost miniature microcontrollers have fewer ‘legs’ than their bigger brothers and sisters – some-times too few. The author has given some consideration to how to economise on pins, making them do... [more]
circuit from:http://www.extremecircuits.net/2010/05/multitasking-pins.html
October 2, 2010
This simple programmer will accept any device that's supported by software (eg, IC-Prog 1.05 by Bonny Gijzen at www.ic-prog.com). The circuit is based in part on the ISP header described in the SILICON CHIP "PIC... [more]
circuit from:http://www.extremecircuits.net/2010/05/simple-universal-pic-programmer.html
October 2, 2010
The losses in a bridge rectifier can easily become significant when low voltages are being rectified. The voltage drop across the bridge is a good 1.5 V, which is a hefty 25% with an input... [more]
circuit from:http://www.extremecircuits.net/2010/05/power-mosfet-bridge-rectifier.html
October 1, 2010
If you’re a biker or scooter rider you’ll know how easy it is to forget to cancel your flashing indicators after turning without an audible reminder. Constantly glancing at indicator lamps is hardly an option;... [more]
circuit from:http://www.extremecircuits.net/2010/05/audible-flasher-warning.html
October 1, 2010
One reason why commercial soldering stations are expensive is that, in general, they require the use of soldering irons with inbuilt temperature sensors, such as thermocouples. This circuit eliminates the need for a special sensor... [more]
circuit from:http://www.extremecircuits.net/2010/05/temperature-controlled-soldering-iron.html
October 1, 2010
Although the modular Portable Mixer design available on these web pages has become a hit for many amateurs, some correspondents required a much simpler device, mainly for mixing mono signals. This design should fulfil their... [more]
circuit from:http://www.extremecircuits.net/2009/08/three-channel-audio-mixer-circuit.html
October 1, 2010
This circuit generates a dual-tone bells ringing similar to most door-bell units. It can be used in many applications other than door-bell. In the Notes below several options will be given in order to suit... [more]
circuit from:http://www.extremecircuits.net/2010/01/bells-ring-generator-circuit-schematic.html
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