More about main (149)

1-07-1985 | elektor july august 1985 0 00 mains interface This circuit is of use, for instance, when a computer is required to moni- tor a mains-operate...

1-09-1984 | lamp saver elektor september 1984 Most incandescent bulbs have an estimated lifespan of about a thousand hours of brightness. The actual tim...

1-07-1984 | maintains the set value la Touch-pad keys normally use a simple digital memory, but they can be operated to give an analogue out- put voltag...

1-07-1984 | space saving and cost effective Warning! This circuit needs to be constructed and wired with the greatest care as the full mains voltage is...

1-03-1984 | The circuit described here is a triac-controlled mains lamp firing circuit consisting of eight independent channels. Each channel contains a...

1-09-1983 | alarm extension ... The garden party is in full swing .. . Amidst all the happy noises and chatter it is difficult to hear when the telephon...

1-07-1983 | 7 power backup for CMOS ICs during mains power failures Even very brief mains power failures cause problems forelectronic circuits. Stored d...

1-07-1983 | 19 emergency mains cut-out If the voltage of the mains supply of a computer rises too high, compo- nents on the printed circuit boards can e...

1-07-1983 | 40 A. Scragg mains wiring tester Here we have yet snother simple cir- cuit, consisting of two neon lamps (with built in series resistors) a...

1-07-1983 | elektorjuly/august 1983 78 40 watt main amplifier Our December 1982 issue featured the 2 x 140 watt Crescendo; here we describe the circuit...