More about Keyboard (67)

1-07-1981 | C. Voss digital keyboard At first sight, this circuit looks rather complicated. It is a keyboard encoder, and it performs the following func...

1-07-1981 | ously. When a key is depressed, the output of IC2 remains logic zero until the counter reaches the corresponding address for that particular...

1-07-1980 | 7-72 elektor july/august 1980 SI 12 03 0310 13 04 IC4 04 74LS175 9 4 Di 01 5O202 2D217 12D303 5V® HEXA DEC. Keyboard DI mim P.STROBE STROBE...

1-07-1979 | When housewiring, the addition of an extra switch and light to an ex-isting circuit using the same power supply point would not normally cau...

1-05-1979 | The ASCII keyboard (Elektor, November 1978) is more versatile than may appear at first sight. Some readers have com-mented that a `shift-loc...

1-11-1978 | The most common method of communicating with a microcomputer is via an alphanumeric keyboard. The keyboard assembly described here is princ...

1-07-1977 | This circuit is designed to give an audible and visible warning to the absent-minded motorist who forgets to switch off...