All items tagged with mechanical and circuit (3)

1-12-1991 | In some countries, the water supply is irregular at most times: in many other countrie at times of a drought. A means of making this less...

1-02-1991 | Most householders these days employ timeswitches to control their central heating systems. Many of these switches, however, are of the mec...

1-07-1990 | Any switch or key in a digital circuit may cause problems because mechanical contacts bounce up and down a few times before they close. N...