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. [...]
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September 28, 2014
FET Constant current drivers for LED display using BF256
This is a FET Constant current drivers circuit for drive LED display which can use FET-BF256 instead resistor so well, can wide voltage source.
January 16, 2014
Switch mode LED driver circuit using transistors
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 [...]
July 17, 2013