Elektor Team (9534)

1-07-1990 | This straightforward circuit, based on four darlingtons, enables a d.c. motor to rotate clockwise or anti-clockwise under the control of two...

1-07-1990 | The LM3915 from National Semicanductor contains virtually everything for making a simple, yet reliable, audio power meter with a bar-type...

1-07-1990 | Most power supplies, particularly switchmode types, are not designed to provide output voltages smaller than a volt or two. lt is often d...

1-07-1990 | With circuit values as shown, this charger allows up to seven series-connected NiCd batteries to be charged. This number may be increased...

1-07-1990 | The voltage regulator in portable, batteryopera ted equipment must have minimum dissipation, good temperature stability, and be able to d...

1-07-1990 | Sine wave oscillators normally generate near-perfeet sine waves, but the stability of their output signal is often not very good. The circui...

1-07-1990 | Siemens' Type PID20 is a passive infra-red detector that transforms heat radiation into electrical pulses. Adding two opamps and some mis...

1-07-1990 | Although the multimeter whose circuit is shown here is fairly simple to make, you may experience difficulties in obtaining some of the co...

1-06-1990 | This mains-powered stroboscope, designed by ELV, ofters a wide range of settings as weil as an external trigger feature so that it can be...

1-06-1990 | Bourns Electronics has for some time marketed aseries of circuit breakers that, in a number of applications, form good alternatives to the...