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Tools and measuring circuit diagrams
September 30, 2010
Many times we have found itself in the necessity to use a Zener diode and cannot to know the voltage of operation. Many times we cannot read the characteristics or the type that is written... [more]
September 30, 2010
This simple circuit tests speakers, microphones, transformers and voltage. It's basically a very low frequency oscillator that produces extremely short 'fruity' pulses. The type of sound produced is very easy to hear and to determine... [more]
circuit from:http://www.extremecircuits.net/2010/01/components-voltage-tester-circuit.html
September 30, 2010
Having good contacts is important – not only in your daily life, but also in electronics. In contrast to social contacts, the reliability of electrical contacts can be checked quickly and easily. Various types of... [more]
circuit from:http://www.extremecircuits.net/2010/04/continuity-tester-circuit-diagram.html
September 27, 2010
This circuit is not a novelty, but it proved so useful, simple and cheap that it is worth building. When the positive (Red) probe is connected to a DC positive voltage and the Black probe... [more]
circuit from:http://www.extremecircuits.net/2009/08/dc-or-ac-voltage-indicator-circuit.html
September 27, 2010
Portable loads such as video cameras, halogen flood lights, electrical irons, hand drillers, grinders, and cutters are powered by connecting long 2- or 3-core cables to the mains plug. Due to prolonged usage, the power... [more]
circuit from:http://www.extremecircuits.net/2010/05/invisible-broken-wire-detector.html
September 27, 2010
If the unit is brought close to a live conductor (insulated, and even buried in plaster) capacitive coupling between the live conductor and the probe clocks the counter, and causes the LED to flash 5... [more]
circuit from:http://www.extremecircuits.net/2009/12/live-line-detector-indicator-circuit.html
September 27, 2010
This circuit is suitable in every situation where over-current protection is required. Here we give an example from the model train world. Every seasoned model train enthusiast knows that there is nothing worse than having... [more]
circuit from:http://www.extremecircuits.net/2010/05/simple-short-circuit-detection.html
September 27, 2010
This circuit is intended for precision centigrade temperature measurement, with a transmitter section converting to frequency the sensor's output voltage, which is proportional to the measured temperature. The output frequency bursts are conveyed into the... [more]
circuit from:http://www.extremecircuits.net/2009/12/digital-remote-thermometer-circuit.html
September 27, 2010
You have to admit that these tiny electronic lamps are handy, and they last almost forever. Around 40 years after Nick Holanyak developed the first LED, they have become just about indispensable. Any self-respecting electronics... [more]
circuit from:http://www.extremecircuits.net/2010/04/led-tester-circuit-diagram.html
September 27, 2010
This simple LED tester consists of a current source with a potentiometer that can be used to adjust the current. The current source is implemented using a type TL081 opamp. The output current of the... [more]
circuit from:http://www.extremecircuits.net/2010/05/very-simple-led-tester.html
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