Simple High power LED flashlight
This is simple hight power LED flashlight,we use 24 LEDs super bright for display and 3 AA batteries and resistor for limit current so cheaper.
Electronics learning with Homeschooling
This is simple hight power LED flashlight,we use 24 LEDs super bright for display and 3 AA batteries and resistor for limit current so cheaper.
My son wants to learn Arduino microcontroller for making the robot. Now, he likes Ubuntu OS. Because it is very fast and good no ads and no virus. He likes to…
This is a fast blinking LED bike light circuit For safety when the bike at night. We use two-NPN-PNP transistor oscillator circuit and RC circuit only show on 4 LEDs…
How to quickly learn transistor and LDR circuits? In this post, I am going to show you how easy learning. My son wants to build a simple automatic flasher. It…
Build 12V high current power supply, do not need PCB. We use a hammer and nail ! Why?