This is companion article for my YouTube video about how to make DIY Vending Machine using arduino and Coin Acceptor. This Vending machine works like real. It can sense a right coin. Only accept the coin defined and add the balance. Here’s the video DIY Vending Machine with arduino Wiring Diagram The Code

This is actually continued from my previous article about how to use OLED display arduino – How to write text, draw shapes and draw bitmap. You should check that if you don’t know how. You can draw bitmap in this OLED display with some steps. Resize your image to fit the OLED display Convert image to …

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GPS is kind popular right now. Many modern devices use this for tracking purposes or just help you navigate when you are lost. GPS Neo 6M is one of most popular GPS module that we can use easily with arduino. This module use serial to communicate with another device.  NEO 6M GPS Wiring with arduino …

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Relay is switch that can be controlled with electronics controller such as microcontroller or arduino. so if you want to connect or disconnect a circuit you can simply use relay. There are so many types of relay in market. But in this tutorial we will learn how to use SPDT relay, which is enough for …

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This Coin Acceptor works by compare the coin that already inserted in this sensor (blue color at sensor) with the coin that inserted at the front hole. If the coin is the same, the coin will accepted, but if coin is different, the coin will be rejected.

If you want to control an DC motor that can run forward or reverse you can do that in many ways. But I want to tell you the simplest way.

this project is about how to display characters to LCD directly by keystrokes/pressing keypad.