Elektor Team (9510)

1-07-1986 | by R v Linden 161UP/DOWN counter control The up/down binary- or BCD-mode counter is a regularly spotted item in digital circuits of various...

1-07-1986 | +4,8V/10mA This circuit is of interest to two categories of readers; first, model air- craft/boat/train enthusiasts object- ing to having to...

1-07-1986 | EE July/August 1986 34 We all sometimes wish that some of the switches around the home were just a little easier to locate and operate, nota...

1-07-1986 | Just like the associated hand-held transmitter (see previous article), the receiver is simple to construct. As can be seen from the circuit...

1-07-1986 | The converter proposed here (also called voltage-controlled current source) is based on just one opamp, and provides to, or draws from, grou...

1-07-1986 | EE July/August 1986 36 by R Shankar 1 111 tuneable FM booster 01 BB106 C1 II Op 75 n BF961 BF981 This FM band (88-108 MHz) preampli- fier ha...

1-07-1986 | one-chip DC converter I 121 R =(Vour-1.2) Finally, the output current may, of course, be boosted by means of a medium power transistor in a...

1-07-1986 | EE July/August 1986 13rms-to-DC converter For some obscure reason, estab- lishing the root-mean-square (rms) value of an alternating voltage...

1-07-1986 | There are a number of well-founded arguments against the use of poison to get rid of mice, rats and other rodents in and around the home. Fr...

1-07-1986 | EE 40 July/August 1986 151thermostat-controlled soil heating Many people with a keen interest in growing plants insist on the fact that many...