| AV recorders used in audio-video presentations contain an additional head to read and write the control pulses for the slide projector. T...
More about relay (98)
| With the aid of a few components a standard relay can be made to change state every time a pulse is applied (or a switch is pressed).
| In most small solar power systems using a boiler it is required that the water circulation pump is not switched on until the temperature...
| In older cars, the battery charging voltage is controlled mechanically. The regulator consists of a relay that switches the stator windin...
| Simple battery chargers and power supplies are not normally provided with a current Iimiter. In many cases, however, it would be advanta...
| Although the 5202DS2 solid-state relay (SSR) from Sharp is a useful and interesting electronic cornponent, it fails to meet the mirtim u...
| This relay card connects to the universal I/O-interface for IBM PCs described in the May 1991 issue. Simple to build and program, it ofter...
| The circiut presented here enables the automatic switching on of outside lighting when its gets dark and, what's more, it does so for a...
| This little circuit switches off the equipment in your audio rack when this has not produced sound for some time.
| The solid-state relay timer described in this article is weil suited to the on/off switching, at predetermined times, of a.c. loads rated...