| In many circuits the switching action is performed by a relay, which in turn activates an external load. This part of the circuit is rarely...
More about relay (98)
| Seiko recently introduced a new line of wristwatches under the somewhat cryptic name of ‘kinetic auto relay’. The internal construction of t...
| Current personal computers with an ATX motherboard are not provided with a switched mains output socket. It is therefore no longer possib...
| When a bipolar relay is to operate from a single supply voltage, normally two coils are needed. When, in Figure 1, the push-button RESET s...
| The combination of a couple of thyristors, key switches and a relay as shown in the diagram forms a suitable, reasonably tamper-proof code...
| It sometimes happens that it is necessary for the contacts of a mains switch to be isolated or for the switch to be able to handle a large...
| Have you ever needed to power a 12-volt relay in a circuit but only had 6 or 9 volts available? This simple circuit will solve that problem...
| Excessive noise is bad for your health and bad for your surroundings. It cannot be said too often: too many young people go prematurely...
| The up/down drive is intended primarily for use with the tone controls described elsewhere in this issue.
| Simple triangle-wave generators have a weakness in that the waveform of their output signal normally cannot be modified. The circuit pre...