More about battery (489)

1-10-1979 | With many electronic games, such as heads-or-tails, roulette, or any of the versions of electronic dice, a consider-able saving in battery...

1-07-1979 | This transistor tester is not intended as a fully-fledged measuring instru-ment; it can be used when a general indication is required of th...

1-07-1979 | This circuit is intended to display any desired character on an oscillo-scope screen. The character is pro-duced by erasing certain dots in...

1-07-1979 | Recharging lead-acid batteries is often assumed to be an extremely straightforward matter. And that is indeed the case, assuming that no spe...

1-07-1979 | Automatic battery chargers are not particularly cheap, however the pro-tection they afford against over-charging and possible battery damage...

1-07-1978 | Most ultrasonic transducers can be operated at input levels up to 50 ... 80 V peak-to-peak. This usually means employing an ultra-sonic osci...

1-07-1976 | Sometimes it seems impossible to set the correct read-out brightness for LED displays. If the brightness is set for good daytime con- t...

1-07-1976 | Frequency doubling devices usually employ a transistor stage operating in class C. In its output circuit there is a tuned circuit whic...

1-07-1975 | This simple circuit will find many applications as a battery eliminator for low power Iequirements. It consists of a transformer, a brid...