Basic SPST (Single-Pole,Single-throw) switch
Mechanical switches permit or interrupt the flow of current. They are also used to direct current to various points. The basic knife switch is the simplest switch. OPEN = OFF , Closed = ON. This is called an SPST (Single-Pole,Single-throw) switch.
Easily draw circuit by easyEDA
My son draw circuits by a pencil, which is not beautiful at all as Figure 1. We found a way to draw a good and perfect EasyEDA.com, we can do circuit simulation, PCB design, Electronic circuit design online for free. It works well on Mac, Linux, Windows and Android: All …
How to fix unclear the 7 segment led display
I’ve bought a cheap digital frequency counter kits. It works great, can measure frequency up to 1GHZ in 19$ only. It use 8 the LED 7 segment display. But it’s a little brighter so cannot clearly read the value. Figure 1 low brightness LEDs My son fix easily this problems …
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 …
Second study English with Electronic components
This is a second study English that my son use learn it by the electronic components. Today we will know three words below. 1. Different Q: Is the resistors different the capacitor? A: Yes, the resistor is different the capacitor. 2. Similar to Q: Are the two transistors similar? A: …