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October 3, 2010
The TPS6420x controller is designed to operate from one to three series-connected cells or from a 3.3 V or 5 V supply obtained from a USB port. At its output it can produce 3.3 V... [more]
circuit from:http://www.extremecircuits.net/2010/05/step-down-converter-controller.html
October 3, 2010
Voltage regulator ICs (78xx series) provide a steady output voltage, as against a widely fluctuating input supply, when the common terminal is grounded. Any voltage about zero volt (ground) connected in the common terminal is... [more]
circuit from:http://www.extremecircuits.net/2010/05/automatic-light-controller-using-7806.html
October 3, 2010
This circuit is permanently plugged into a mains socket and NI-CD batteries are trickle-charged. When a power outage occurs, the lamp automatically illuminates. Instead of illuminating a lamp, an alarm sounder can be chosen. When... [more]
circuit from:http://www.extremecircuits.net/2009/07/emergency-light-and-alarm.html
October 3, 2010
This simple circuit mixes two or more channels into one channel (e.g. stereo into mono). The circuit can mix as many or as few channels as you like and consume very little power. The mixer... [more]
October 3, 2010
Readers who do not care to modify the power supply of an old PC into a suitable halogen power source (see our April 2006 issue), may find the present design a welcome alternative. The circuit... [more]
circuit from:http://www.extremecircuits.net/2010/05/alternative-halogen-power-supply.html
October 3, 2010
Following a hunch, the author discovered (or re-discovered?) that all plants carry an electric charge relative to the ground. This charge is more or less constant regardless of the size of the plant - a... [more]
October 3, 2010
A simple circuit, peak indicator of tops of musical signal. Each time where the level of signal exceeds the level + 4dB, turns on led D1. It is useful in each channel of console of... [more]
circuit from:http://www.extremecircuits.net/2009/07/peak-indicator.html
October 3, 2010
The main requirement was to power the circuit by means of a common, PP3 (transistor radio) alkaline battery. So, implementing a low current drawing circuit was absolutely necessary, though preserving a High Quality performance. [more]
October 3, 2010
This light-weight gadget produces an adjustable gain on sounds picked up from the built-in high-sensitivity condenser microphone. So you can hear what you have been missing. With a 6V (4×1.5V) battery, it produces good results.... [more]
circuit from:http://www.extremecircuits.net/2010/05/spy-ear.html
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