| Binary-coded-decimal (thumb-wheel) switches are not only relatively expensive, but are also often not available to the wanted specificati...
All items tagged with Time and Electronics (309)
| The wide frequency range, low power consumption and well-defined switching levels of HCMOS inverters make these devices emlnently suited t...
| 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...
| 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...
| As discussed last month, the timecode interface is an ingenious piece of electronics capable of putting time codes on a magnetic tape a...
| 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...
| Many people still use the old C64 computer to play games on, but get frequently annoyed by the constant need of changing over the joysti...
| The pump in sorne central-heating systems has two or even three speeds. At the lowest speed, not much hot water is pumped around the cir...