Pulse Generator Oscillator 32.768KHz by watch crystal
My Friend need to like a Pulse Generator Oscillator circuit that stable frequency at 32.768KHz with watch crystal,for digital CMOS binary counter, so he tell to me even low prices. I think may be used the watch crystal and IC4069 or IC4049 inverter CMOS IC. They are very cheap and …
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 …