A microcontroller is a small computer on a single integrated circuit containing a processor core, memory, and programmable input/output peripherals. Microcontrollers are designed for embedded applications, in contrast to the microprocessors used in personal computers or other general purpose applications.

AceButton levels for LadderButtonConfig

16 Dec, 2021
Using multiple buttons on a single pin is possible. There are modules for that. Also there is a great library called AceButton to make the button click easily readable. The library needs you to set...

Arduino: white boxes on line 1 and 3, LCD 20x4

15 Dec, 2021
An error where 2 lines out of 4 are having a white background. There is an easy solution for having this problem where 1 and 3 lines are showing white blocks. The lcd is actually 2 lines of 40...

Arduino: Turn Relay On and Off with Push Button

12 Sep, 2020
Turn a relay on and off using a push button. When using a pushbutton, you have use a library (don't reinvent the wheel) to control the push button signal. It's called a debounce, taking account in...

Controlling 220v using Arduino relay board

20 May, 2014
Get your relay from AliExpress.com:5V 2-Channel Relay Module Shield For Arduino with Free ShippingThis guide shows how to control 220 / 230 V using relay board. This is very general relay board, you...

Simple LED light up with Arduino

25 Jan, 2013
Simple LED light up with Arduino. I have just connected LED lamp to 5 volts. Also I added a resistor that is 1k Ω. This is the first thing I did with my Arduino when I bought it. Basically you don't...

Arduino Light Sensor Circuit Tutorial

10 Dec, 2011
Arduino light sensor circuit tutorial shows how to connect light sensor to Arduino and how to use it in your programs. Light sensor measures light intensity and you can read it with Arduino using an...