Posted inDigitals & Microcontrollers Lightings
2 Traffic light circuits easy to build
The Traffic light controller circuit. use the LEDs for display and the digital circuit as based, include IC-4027,CD4017,IC-555 and so easy and cheap. [...]
Posted inDC converters
Low Power LED driver circuit with Save energy Switch mode
How to make it light long time or use battery longer than usual. we use this Switch mode LED driver circuit using transistors. and simple circuit below [...]