How to build a device of detecting the distance with a micro:bit
The novel Coronavirus is still existing in the world and we need to make sure the social distance be kept in public areas such as in hospitals or banks. This device will warn people who do not keep enough distances to others.
Voltage, Current, Resistance, and Ohm's Law
There is a wonderful connection between voltage current resistance, they are all related to the movement of charges. You can get more detailed information from ELECFREAKS.
Get to Know WS2812b
WS2812b is the kind of LED bead that I like most. It does not like common LED that needs IO control to every LED bead, nor like RGB LED that needs three pins to realize a colorful display. The biggest characteristic of WS2812b is that it can realize cascade connections. With an IO port only, you can control the color of all LED beads. Today, I am going to talk about the reason why WS2812b has this amazing function.
Arduino Simulation Computer Keyboard
Using Arduino to simulate a computer keyboard we can freely set the key time and key value, ELECFREAKS can provide quality Arduino keyboard, click to learn more
HC-SR04 Ultrasonic Module User Guide
Hc sr04 ultrasonic distance sensor can be used to measure the distance by detecting ultrasonic rays. Get hc sr04 ultrasonic distance sensor at ELECFREAKS.
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