| In some countries, it is still obligatory for cars parked in the road at night to have their parking lights on. If the car is parked well...
More about Switch (454)
| Although a digital circuit for driving a load such as a lamp or a d.c. motor is fairly simple, it has a few drawbacks. It does not make t...
| This circuit switches two electrical loads on and off under the control of an acoustic signal. The remote control operates reliably up to...
| This article describes an automatically operating night light with two remarkable features. First of all, a light-operated switch turns th...
| A switch, based on a PIC(1) RISC(2) processor, is described that enables mains-operated equipment, such as a computer, a coffee maker, or...
| In this series we look closely at digital electronics, what it is, what it does, how it works, and its promise for the future.
| Most readers will be acquainted with a tone control as found on many audio amplifiers. Such a control normally consists of a potentiomet...
| Most satellite receivers provide a direct voltage at their coaxtat output which, depending on the plane of polarization of the set progr...
| The 'Medium power a. f. amplifier uses a relay for the switch-on delay to suppress annoying switching plops. When the amplifier ts switc...
| SWITCHABLE A.C. SUPPLY Many experiments in the electronics workshop require a.c. voltages simply by setting the alternating supply voltages...