| This circuit switches two electrical loads on and off under the control of an acoustic signal. The remote control operates reliably up to...
All items tagged with LED and Circuit (32)
| The switching unit described here is capable of controlling up to seven mains-powered loads with the aid of commands received via telephon...
| The charge-discharge-idle (C-D-D monitor described here is suitable for all vehicles with a 12-V or 24-V battery of which the negative t...
| When the control voltage at the Input of the circuit is varied from 0 V to +12 V, the LED will first light up green and then gradually, via...
| In this somewhat unusual digital voltmeter, the measurand (voltage to be measured) is digitized in an analogue-todigital (A-O) converter...
| The circuit diagram of the power supply shows that the semiconductor tester has an on-board step-up voltage converter that is powered from...
| The mute circuit presented here Is specially designed for use with the Roland MT32 module, although with some small alterations it should...
| Applications for this mechanically set and reset bistable are found, among others, in anti-theft devices and model railway crossings.
versatile counter circuit - upwards or downwards, for LED or LCD, for common-cathode or common-anode
| versatile counter circuit elektor march 1985 Counter circuits have long been a tradition in Elektor. It started with one of the very first i...
| gyroflash elektor february 1985 from an idea by F. Lemoine gyroflash five sequential rotary flash tubes controlled by a single circuit Pract...