Elektor Team (9504)

1-07-1984 | . . . program m able from seconds to years The timer described uses few com- ponents but yet has a relatively wide timing range which may be...

1-07-1984 | for France Inter A very accurate time signal is available by tuning in to the Rugby MSF transmitter. This is not, however, the only such sig...

1-07-1984 | with LED indication One of the largest annual expenses for most home owners is the fuel for the central heating. Apart from keep- ing the ho...

1-07-1984 | gives double protection Warning lights fulfill an undeniably important role in many technical in- stallations. However, even in the best of...

1-07-1984 | "How many volts above freezing is it?" A multimeter is the most common item of test equipment used by elec- tronic hobbyists. This is with g...

1-07-1984 | july/august 1984 big brother is watching you . . . This monitor circuit is based on the MC 3424 power supply supervisory IC. It provides two...

1-07-1984 | // the ratio of R2 + R3 + P1 to R3 + P1. The input impedance, which, at 1 M, is quite high, is de- fined by R1 as the op-amp has FET inputs....

1-07-1984 | maintains the set value la Touch-pad keys normally use a simple digital memory, but they can be operated to give an analogue out- put voltag...

1-07-1984 | . for sleepy drivers radio can be switched on and off via a relay contact. Switch on the supply; the display should then flash. Setting the...

1-07-1984 | a tried and tested formula Most light dimmers that are available in the usual electrical goods shops can only handle a fairly small power. A...