| Unfortunately, these days it is no longer an inordinate luxury to protect your car against break-in and theft. Many car insurance companies...
All items tagged with LED and Alarm (5)
| A digital alarm clock which decodes and synchronises itself to the time signal picked up from the Rugby ‘MSF’ transmitter on 60 kHz.This is...
| These days, if you want to protect your home and valuables, you can't avoid installing a clever and reliable alarm system. The circuit...
| In this somewhat unusual digital voltmeter, the measurand (voltage to be measured) is digitized in an analogue-todigital (A-O) converter...
| burglar deterrent elektor november 1984 Every week the local papers carry tales of burglaries and break-ins, sometimes in our own street or...