| The object of this circuit is turn the domestic lighting on and off in complete safety in a room with very high humidity. A detector, flush-...
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| The author set to work equipping a model car with realistic indicators, headlights, tail lights and brake lights. The basic idea was to tap...
| The TDA7052A is a readily available amplifier chip (Farnell # 526198) that has a DC controlled volume input. Here, the IC is used as the var...
| This circuit is inspired by an amplifier published in the ’60s that produced 8 watts a channel into 8 Ohm and was based on AD161 and AD162 g...
| Like all its counterparts, this network wiring tester comprises two elements, a transmitter unit, powered and fitted at the network start po...
| Most guitar pedals obtain a high input impedance simply by using a large resistor at the input of the first opamp, but this generates a good...
| The special feature of this analogue wall clock is that it uses a standard model servo to tell the time. The display principle is the same a...
| Here’s a dimmer that, besides being touch-controlled, also has a setting memory that enables it, for example, to turn the lighting on at the...
| After licensing restrictions were relaxed in many countries for VHF FM band transmitters with 50 nW transmit power, several small, inexpensi...
| It takes up to an hour for our eyes to fully adapt to the dark and achieve maximum light sensitivity with the iris fully open. Astronomers u...