| elektor july/august 1983 21 flashing running light Roadworks are usually marked during the hours of darkness by yellow flashing lights. Thes...
| elektor july/august 1983 21 flashing running light Roadworks are usually marked during the hours of darkness by yellow flashing lights. Thes...
| 22 2650 single step It can be very handy if the micro- processor can be put into single step mode when debugging home made programs. This li...
| lektor july/august 1983 23 1MHz time base without crystal Clock generators, for instance, those used in microprocessor systems, are normally...
| 24 machinegun- soundgenerator Computer games are even more fun when they are accompanied by sound effects. As most such games have a more or...
| 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...
| 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...
| 27 auto trigger This circuit gives an output voltage when the input voltage rises above a certain reference level which is derived from the...
| LED "amplifier" The light emission of an LED is normally pretty low. If more brightness is required, the following circuit will help. The LE...
| 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...
| 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...