miser LED

13 miser - LED te amount of The circuit described here allows he energy consumed by LEDs to be duced to a fraction of the normal value. This is accomplished by switching the LED on and off at intervals of 0.625 seconds, thereby reducing the average current through the LED to around 200 pA with a peak value of about 100 mA. This is quite sufficient for normal "viewing". Mainly due to continually more dense integration, electronic circuits are becoming less and less demanding on energy consumption. However, this does not hold true for LEDs which are used for a variety of indicator functions. Most LEDs consume a minimum current of around 20 mA, which in used many instances is several times more than that cially e circuit. This is an espe unsatisfactory situation where the equipment in by the rest of 7-16 — elektor July/august 1981 question is battery-powered. The circuit operates as follows: Capacitor Cl is charged via resistor R2. Once the potential across this capacitor is suff...