Elektor Team (9531)

1.11.1976 | Although designed as a warning horn for use . with the `Albar` ultrasonic alarm system de- scribed elsewhere in this issue, the...

1.11.1976 | The well-known TTL IC type 74 I 21 is a monostable multivibrator that can be set to give an output pulse with a duration...

1.11.1976 | In this age of digital things (?) it is nice to dress up the front panel of home-brew equipment with digital readouts. This handsome...

1.11.1976 | Summer is long gone, and all of nature is proceeding through its autumnal eventide towards winter hibernation. Birds are departing,...

1.11.1976 | The film slave is a sound activated switch originally intended to control a cine camera. However, with little or no modification it...

1.11.1976 | A pulse generator is an extremely useful aid when testing and servicing logic circuits. The generator described here is uncomplicated and...

1.11.1976 | This unit will sound the alarm if the door of a refrigerator is left open too long. Very few components are required for this effective...

1.11.1976 | A number of methods are known to perm it isolation between separate but otherwise co- operating electric circuits. Perhaps the most fam...

1.11.1976 | At a certain age, children are often packed off to bed with the final admonition: `All right, you can read in bed for a quarter of a...

1.11.1976 | At a certain age, children are often packed off to bed with the final admonition: `All right, you can read in bed for a quarter of a...