| This article is one from our 90s collection, we talk about the letters that we received from our dear readers.
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| This article is one from our 90s collection, we talk about the letters that we received from our dear readers.
| I f you want to fit your loudspeaker enclosure(s) with a drive indicator, it is best to use a unit that does not need a power supply. The...
| The timer is based on a Type 4536 from SGS-Thomson. This IC contains 24 series-connected binary scalers, which divide the frequency of t...
| This circuit ensures that messages received by a radio or transceiver are automatically recorded on a cassette or tape recorder. lt is as...
| This circuit switches a mains operated load on and off under the control of two presskeys.
| A simple approach to the problem of frequency doubling a digital signal is shown here. An XOR gate, lC(1a) supplies a needle pulse on the...
| Since the reactance of a capacitor is inversely proportional to the capacitance, it may be used as the basis of determining the value of...
| This circuit, a. d.c.-d.c. converter, is intended to charge environment-friendly batteries in and environment-friendly way. lt is based...
| Many audio circuits need a symmetric power supply of ±12 V. If such a circuit is to be used in a car, the -12 V line must be somehow deri...