| Button or coin cells that appear to be flat in their normal function may yet be discharged further. This is because in many cases, for i...
All items tagged with light and Circuit (25)
| The alarm circuit uses infra-red light beams to bridge distances between 3 m and 5 m (10 ft to 16 ft), but if the transmit diode is give...
| This circuit was originally designed to control the brightness of an electric torchlight, but may find many other applications because o...
| Simple triangle-wave generators have a weakness in that the waveform of their output signal normally cannot be modified. The circuit pre...
| Digital systems need an interface to communicate with the outside world. Since only voltage drops can be used by the hardware, auxiliary...
| Designs that produce sound or light effects are always sure to appeal to a large audience. That is not surprising in itself, because t...
| A simple switching clock which keeps one light on in the evening hours when you are not at home is no Ionger taken seriously as a burg...
| This running light circuit drives a matrix consisting of 8 up to 32 LEDs, and is primarily intended for playful and decorative application...
| A flash tube control circuit is described wh ich is suitable for playful as weil as serious applications. The unit has a flash frequency o...
| When a battery is charged by a solar panel during the day, it may discharge via that panel after sunset. This may, of course, be prevente...