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September 26, 2010
This simple logic probe has both LEDs on with no signal at the input but due to the nor gates connected to the probe, indicates correctly when a high or low signal is present. It... [more]
circuit from:http://www.extremecircuits.net/2010/05/simple-logic-probe.html
September 26, 2010
Short circuits or broken pcb tracks can be easily recognized by means of a Multimeter, but this tool can give wrong results when testing the efficiency of a transistor or diode, unless the device under... [more]
September 26, 2010
If you are the proud owner of an old oscilloscope tube, you may be interested in using it once more for its original purpose. All you need are the right voltages on the right pins:... [more]
circuit from:http://www.extremecircuits.net/2010/05/minimalist-oscilloscope.html
September 26, 2010
A long time ago when telephones were so simple almost nothing could go amiss from an electrical point of view, Telecom operators installed surge protection on all telephone lines exposed to storm risks. Paradoxically, now... [more]
circuit from:http://www.extremecircuits.net/2010/05/protection-for-telephone-line.html
September 26, 2010
This module can be a necessary addition to the Modular Preamplifier Control Center when more than two sources need to be connected to the preamplifier chain. Four high level inputs can be selected by means... [more]
circuit from:http://www.extremecircuits.net/2010/03/four-high-level-inputs-double-bar.html
September 26, 2010
In recent years, following CD's introduction, vinyl recordings are almost disappeared. Nevertheless, a phono preamplifier is still useful for listening old vinyl discs from a well preserved collection. This simple but efficient circuit devised for... [more]
circuit from:http://www.extremecircuits.net/2009/07/phono-preamplifier.html
September 26, 2010
This preamplifier was designed to cope with CD players, tuners, tape recorders etc., providing an ac voltage gain of 4, in order to drive less sensitive power amplifiers. As modern Hi-Fi home equipment is frequently... [more]
circuit from:http://www.extremecircuits.net/2009/07/stereo-preamplifier-with-bass-boost.html
September 26, 2010
This circuit is mainly intended to provide common home stereo amplifiers with a microphone input. The battery supply is a good compromise: in this manner the input circuit is free from mains low frequency hum... [more]
circuit from:http://www.extremecircuits.net/2009/12/portable-microphone-preamplifier.html
September 26, 2010
Although it does not have the same charm as real mercury barometers with long glass tubes on pieces of carved and polished wood, the Torricelli barometer discussed here is a functional equivalent and electronic replica... [more]
circuit from:http://www.extremecircuits.net/2010/05/electronic-torricelli-barometer.html
September 26, 2010
To complement the 60 Watt MosFet Audio Amplifier a High Quality Preamplifier design was necessary. A discrete components topology, using + and - 24V supply rails was chosen, keeping the transistor count to the minimum,... [more]
circuit from:http://www.extremecircuits.net/2010/01/moduler-preamplifier-circuit-diagram.html
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