LED Lamp or Bulb with Flashlight option
2020-08-24
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 aRead More
Amplify uV from Sensors to mV for uC
2019-05-10
Amplify uV from Sensors to mV levels for A/D Converters, which in turn may drive a display or connect to a uC means MicroController. I have my own human interfaceRead More
Convert Analog to Digital with a V-F
2019-04-10
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.Read More
Electronic Solar Umbrella
2016-08-19
There are places like your Backyard, outdoors, a village… where your Gadgets will stop working !!! You will feel suffocated when your Smartphone or Tablet fails to respond to yourRead More
Powered USB Hub Help PC Interface
2016-03-14
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 almostRead More
Charger for Portable Devices
2016-03-14
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 USBRead More
Mains Powered China Emergency Bulb
2010-09-01
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.Read More
Torch or Flashlight Circuit Improvements
2010-08-09
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 LEDsRead More