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 Platforms Supported Figure 1 hand drawn circuit EasyEDA is a free, zero-install, Web and Cloud-based EDA tool suite, integrating powerful schematic capture, mixed-mode circuit simulator and PCB layout in a seamless cross-platform browser environment, for electronic engineers, educators, students and hobbyists. Please read more on easyeda.com look below: Now he …
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 by Installation film Cars. Makes Digits display very clear. Figure 2 Digits clear when use film How to make easy This films, He request the car store near the house. Select the intensity level of about 60%. First of all, Figure 3 Measure the width the LEDs Figure 4 Cutting …
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 M. Mims III”. The content is easy to read, even if English is difficult, for people to learn a second language, I like a science project. When the son grew up, I wanted him to read as well. How It Works The piezo speaker is connected to the input of …
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: Yes, the transistors are similar. Q: Is 2SC458 similar to 2SC1815? A: Yes, 2SC458 is similar to 2SC1815. 3. The same (as) Q: Is LDR the same as photoresistor? A: Yes,the LDR is the same as the photoresistor. I hope my son’s learning will be useful for you.