Category «Lighting»

Black Light (UV Tube Lamp) Inverter

The voltage boosting in this circuit enable its operation to be powered by 2.5 V rechargeable battery (two cells 1.2V rechargeable batteries),  supplying 400 mA current at 26 V which is needed by the gas arc tube for portable ultraviolet lamp. This inverter circuit has a good efficiency as well, about 80%. Ultraviolet (UV)  light …

Ring-Around LED Flasher

This schematic diagram shows a ring-around LED flasher circuit. This circuit will turn off two LEDs and turn on the other two until the timing cycle reverses. This circuit can be configured to flash four LEDs in sequential order  by pressing and holding S1 closed until only one of the LEDs is on then releasing …

Color-Shifting LED Show

This circuit gives a changing-color LED display, where a LED will emit a dynamic shifting color, from red to green smoothly through yellow. The circuit uses NE556 dual timer, equal to two 555 IC but in only one package. The oscillators is set at different frequencies. The high frequency (upper part) is used to construct …