| This circuit allows one or several mains-operated apparatus (‘slaves’) to be automatically switched on when a ‘master’ apparatus is swit...
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| If there is one thing that a lead-acid battery does not like it is persistent neglect. When such a battery is being discharged, its en...
| Last month we gave you the low-down on the hardware aspects of this powerful and versatile IC tester. In this second and concluding in...
| This filter fulfils three functions: it acts as a in-phase filter for common-mode noise and as an antiphase filter for differential-mode n...
| The delay is intended to switch on the mains to heavy loads gradually to ensure that the switch-on current remains within certain Iimits...
| The circuit described, in conjunction with a digital voltmeter (DVM), may be used to measure the total harmonie distortion (THD) of the m...
| When the loudspeaker of your audio installation crackles or your computer gives problems, the cause may lie in disturbances on the ma...
| Motorola's 68HC11 is currently one of the world's most popular microcontrollers. This article presents an emulator for this wonderful...
| The presenr circuit, consisting of only a handful of cornponents, enables a rnains-operated lamp to flash at Intervals of about one seco...
| It is a frequent requirement in computer and audio systems that several units are switched on or off simultaneously. The simplest way of...