All items tagged with time and technology (303)

1-12-1995 | This circuit, a. d.c.-d.c. converter, is intended to charge environment-friendly batteries in and environment-friendly way. lt is based...

1-12-1995 | 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...

1-12-1995 | Here is a simple, fairly accurate and linear, full-wave rectifier for small signals (approx. 10 mV to 3 V) with a frequency between d.c....

1-12-1995 | Occasionally, problems occur when a power supply does not maintain its output voltage owing to a change in load as when an amplifier is...

1-12-1995 | The wideband distribution amplifier is based on a single Type OPA621. This op amp is typified by a very short settling time, a high slow...

1-12-1995 | Many audio amplifiers are still fitted with one or two inputs Ior a dynarnic pick-up. Since record players are used less and less frequen...

1-12-1995 | Drying the washing in sunlight has a number of advantages compared with using a tumble dryer: it saves a lot of energy : the ultraviolet...

1-12-1995 | Many switching functions are digitally controlled nowadays. A drawback of this is that it can no langer be seen from the position of the...

1-12-1995 | The proposed filter consists of two series-connected used-order sections. The resistors used are E96 types with a tolerance of 1%. Their...

1-12-1995 | The circuit presented is intended primarily to limit the switch-on current drawn by lamps and other mains-operated appliances. This curre...