Elektor Team (9504)

1-07-1983 | 27 auto trigger This circuit gives an output voltage when the input voltage rises above a certain reference level which is derived from the...

1-07-1983 | LED "amplifier" The light emission of an LED is normally pretty low. If more brightness is required, the following circuit will help. The LE...

1-07-1983 | 29 economic LED The usual method of operating an LED from a voltage which is higher than its forward voltage is well known. A limiting resis...

1-07-1983 | 30 simple regulated power supply If you compare the expense and the rating of this power supply you will get a surprise, because the output...

1-07-1983 | 31 address decoder or buffer, timing faults or any of the various other problems that can (and do) occur. Of course a logic analyser would m...

1-07-1983 | 32 hFE tester This hFE tester is interesting because of its simplicity and because it enables the of both PNP and NPN transistors to be meas...

1-07-1983 | elektor july/august 1983 K~C3 prelude buffer In the final Prelude article, Prelude p.s. in the May issue, we described a buffer stage that c...

1-07-1983 | 34 battery economizer 0 83416 H

1-07-1983 | 7-52 july/augu 35 electronics and plant physiology That trees and plants have a soul has been known to plant lovers and gardeners for a long...

1-07-1983 | 36 30 68 60 70 d.c. voltage doubler using a 4049 This simple circuit can produce a d.c. voltage which is approximately twice the supply volt...