| A digital signal must have a certain duration before it can be monitored using an LED. Short pulses cause the LED to flash for an interval t...
F. Rimatzki (4)
| The timer was designed for switching off a battery charger after a predetermined time to avoid overcharging. It may, however, be used for...
| This circuit was originally designed to control the brightness of an electric torchlight, but may find many other applications because o...
| Many battery-operated appliances have an LED indicator that shows the state of the battery. If the battery is almost flat, the LED flickers....