| Rectifying the buzzer signal on a telephone line results in a voltage that may be used to switch one or more loads, for instance, a light...
More about Electronics (817)
| This circuit has been designed primarily for use with valve amplifiers. When the arnplifier is switched on, filament voltage is supplied...
| Some video cameras have a socket for a remote control unit. It appears, however that it is not always easy to connect an interval-contral...
| It is hard, if not impossible, to think of professional and industrial electronics design without a computer entering at some stage along...
| The recently introduced LM2575 and LM2577 switch-mode voltage regulators in the Simple Switcher series from National Semiconductor have a...
| As discussed last month, the timecode interface is an ingenious piece of electronics capable of putting time codes on a magnetic tape a...
| Two integrated circuits from Plessey, the MV500 transmitter and the MV601 receiver, allow remote control systems to be built from a minim...
| There are many chips on the market that may be used in a keyboard circuit, but many of these are fixed and do not provide all the keys re...
| The present circuit was developed to make it possible for different sensors to be added ro an existing alarm installation. These sensors...
| To prevent the dynamo-driven lights of your bicyle going out when you stop in the dark for, say, traffic lights, the simple circuit here...