LED Lamp – Simple Bed-Lamp Circuit
LED Night lamp, Clock Lamp to see time at night. It is a Green Lamp just 50mA, but its Blue in Color.
Tagged: Schoodles
LED Lamp or Bulb with Flashlight option
This is another LED lamp from China, these people make nice lamps and also good designs of the plastic enclosure. Here by a clever enclosure design it is both a emergency mains bulb and...
Convert Analog to Digital with a V-F
A Low cost A/D with a Potential of 5KV Isolation from Computing elements by use of Normal/Special Opto-Couplers. This can give better resolution and accuracy than a 8 bit A/D. may be close to...
Powered USB Hub Help PC Interface
I got a strange problem as i added more and more peripherals, the pc gave odd messages, “i cannot detect what you are doing” and things like that. I almost flipped trying to locate...
Charger for Portable Devices
This is a simple charger you can build for devices. It can be modified for any device. This may need no modification for devices that are charged using PC USB port.
Mains Powered China Emergency Bulb
A typical Mains Powered China Lamp. On power down, LED light turns on for around 1/2 hr. Gets damaged on lightning activity and wide (uS not nS) transients above 300V. Drawing may have error.
Torch or Flashlight Circuit Improvements
I fixed a China Torch with New LEDs and a Diode, it failed probably on a drop shock, the battery wire cut … then when put on charge Few LEDs went bad, as battery...
Mains Adapter 230V AC 50 Hz to Rectified DC
Mains Adapter Converts 230V AC 50 Hz to Rectified DC which replaces a Battery Pack. It was also called Battery Eliminator by older generations as it was used to save Battery Cost in AM...
Ni-Cd and Li-ion Battery charger Generic
This is a Generic charger that is made by many brands, the circuit is an approximation of all. Some improvements suggested. Some brands in europe and usa also use this circuit. This works well,...
LED Flashlight made out of a China Lamp
LED Flashlight made out of a China Lamp that was busted on a High voltage surge during a Thunderstorm. I got many LED lamps, mainly from china. The Chinese Entrepreneurs are Creative and Adventurous....
Emergency Light with Fluorescent Tubes
Emergency Light for Portable Use. Note Charger and Battery not Shown. Design from Ludens. 12 Volt fluorescent lamp drivers: Three schematics of 12 V drivers for 2, 8 and 20 Watt, plus a lot...
One Watt Mains LED Lamp or Tubelight
Lots if Light on One Watt, yes this works, but should be built by those experienced in High Voltage usage and Knowledge of insulation techniques.
