Elektor Team (9518)

1-07-1983 | lektor july/august 1983 23 1MHz time base without crystal Clock generators, for instance, those used in microprocessor systems, are normally...

1-07-1983 | 24 machinegun- soundgenerator Computer games are even more fun when they are accompanied by sound effects. As most such games have a more or...

1-07-1983 | 25 centronics interface... with the 6522 VIA In spite of the advantages of a visual display unit for a computer this, now common, medium has...

1-07-1983 | ktor july/august 1983 26 joystick interface It happens from time to time that it would be nice to read the position of a potentiometer with...

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...