More about LED (792)

1-02-1996 | This battery tester is capable of measuring the capacity of batteries up to 17 V at a maximum discharge current of 1 A. Remarkably, the test...

1-12-1995 | Normally, stroboscopes, which are intended to emit short, intensive light pulses, operate from very high voltages. The present circuit wo...

1-11-1995 | With the darkness of winter evenings on them again, joggers, walkers, hikers and long-distanee runners should take heed of their safety...

1-07-1995 | Since measuring liquids with a direct voltage quickly leads to catalysis effects and corrosion, the gauge uses a rectangular voltage. The...

1-06-1995 | This circuit switches two electrical loads on and off under the control of an acoustic signal. The remote control operates reliably up to...

1-05-1995 | Today's personal computer, by virtue of its relatively low price and respectable computing power, is a perfect basis for a measurement sys...

1-03-1995 | A switch, based on a PIC(1) RISC(2) processor, is described that enables mains-operated equipment, such as a computer, a coffee maker, or...

1-02-1995 | These days it is perfectly normal for complex functions of TV and audio equipment to be controlled from the couch or armchair. Unfortunate...

1-12-1994 | Standard potentiometers have some unfortunate properties, such as crackling when they get older and unequal tracking in stereo types. A...

1-12-1994 | The display is intended as a turning indicatoror a VU meter on a stereo FM radio. The first function is selected by pressing S1 (which m...