Make Lamp as power load
We like to test the functionality of a high current power supply by simple power load. It is 12V lamp 50 watts. But it had a high temperature. Require a docking station proper on long time trials. Today my son build docking for this lamp. Figure 1 All parts We …
How to use CH340G Arduino Nano 3.0 on mac osx
Today we try to use CH340G Arduino Nano 3.0 on Mac OSX. In the beginning it was a problem. But it can be easy to fix. We liked it, because small, very cheap, and it can be exactly the same as the Arduino UNO. Friends recommend using the Arduino Arduino …
Vibration Sensor Circuit Kit
Simple vibration and motion sensors can be made using a pendulum switch, mercury switch or one of many other methods. The Vibration Sensor Kit uses no moving parts to detect vibration. Instead, a piezo speaker element is used as a sensitive vibration sensor. Note: I admire the writings of “Forrest …
DIY pocket pack solder
This is DIY pocket pack solder. To portable and lightweight with the division lead to shorter. Normally we always to buy big lead because worthy than small. My son buy new solder; DIA: 0.8mm 1LB TIN/LEAD 60/40. But He does not like it because too much heavy and difficult to …
0-30V 3A Adjustable DC Supply
This is cheap adjustable 0-30V 3A Laboratory DC Power Supply circuit. It is high efficiency regulator circuit by using IC regulator UA723 and TIP3055 as power transistor so easy to install. It is designed to protect over current load maximum 3A Technical data -Need to use transformer : 12-0-12V 4A. …
Simplest Automatic Solar Light
This is simplest automatic solar led light circuit that my son try to make it for basic small solar charger. This circuit is a simplest circuit. He trial it to learn about solar LED light, and makes it all by himself. He needs one LED light that brightest at night. …