| This design answers the widespread interest in applications involving smartcards. Chip-type telephone cards and credit cards catch the fan...
| This design answers the widespread interest in applications involving smartcards. Chip-type telephone cards and credit cards catch the fan...
| The tester checks whether a transistor, n-p-n as weIl p-n-p , works or not. If it does. the buzzer emits a squeak.
| Many audio circuits need a symmetric power supply of ±12 V. If such a circuit is to be used in a car, the -12 V line must be somehow deri...
| There is a problem if you want to use a car battery to power a circuit which requires a symmetrical supply voltage. Having abandoned the i...
| More than twenty years ago, IBM designed a computer system for small office appiications. No one at that time could have foreseen the revo...
| The SCART switching box was carefully designed to make sure that any input is connected to only one output at a time. This was done to pre...
| Although most car radio/casse players produced in the past five years or so are fitted with a front/rear speaker volume control, there a...
| In some countries, it is still obligatory for cars parked in the road at night to have their parking lights on. If the car is parked well...
| The output stages of many car radio/cassette players have no switch-on delay for the loudspeakers. This causes annoying clicks when the...