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June 22, 2010
Overcharging apparently leads to voltage depression, which can be corrected by one or two complete discharges (to 1 to 1.1 volts per cell). [more]
June 22, 2010
Circuit of a digital volume control using six discrete ICs, including a 5V regulator, is presented. [more]
June 22, 2010
By using the same circuit of the "Digital Stopwatch 0-99sec", we can add an AND gate, and transform the 0 – 99sec stopwatch to a 0 – 60sec stopwatch. [more]
June 22, 2010
This circuit is intended for precision centigrade temperature measurement, with a transmitter section converting to frequency the sensor's output voltage proportional to the measured temperature. [more]
June 22, 2010
This circuit is a Digital Radar Speedometer. It allows us to evaluate the speed of any object moving, especially cars and other vehicles. [more]
June 22, 2010
Here is a deluxe version of the simple charge rate limiter, using the same idea but with the ability to charge two packs simultaneously from a single wall charger. [more]
June 22, 2010
A DC motor reversing circuit using non latching push button switches. Relays control forward, stop and reverse action, and the motor cannot be switched from forward to reverse unless the stop switch is pressed first. [more]
June 22, 2010
This circuit adopts the rather unusual Bowes/White emitter coupled multivibrator circuit. [more]
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