How to use INA219 current sensor with arduino and Make DIY wattmeter with it
If you want sense electric DC current, then you will have some current sensors options. The current sensor can vary depends on what needed. We can decide which sensor to use based on its capability to sense the current. In this tutorial we will learn how to use INA219. So why INA219? In my opinion, …
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Temperature and Humidity Sensor DHT11 with arduino Tutorial – Make OLED Termometer
DHT11 is cheapest temperature and humidity sensor compare to another sensor. It has 3 pins that we can easily interface with arduino. It uses single-bus operation. DHT11 Specification PCB size 22.0mm X 20.5mm X 1.6mm Working voltage 3.3 or 5V DC Operating voltage 3.3 or 5V DC Measurement range 20-95%RH；0-50℃ Resolution 8bit（temperature），8bit（humidity） Compatible interfaces 2.54 …
Easy Pulse Plugin Heartbeat Sensor with arduino Tutorial
There are some heartbeat sensor in market with cheap price. I’ve used three of them. In my opinion, the most stable is easy pulse plugin.
Non Contact Temperature Sensor MLX90614 With Arduino Tutorial
MLX90614 can measure an object temperature without touch the object. It is also can measure high temperature. And it is easy to use with an arduino.
How to convert resistance to voltage
Converting resistance to voltage in electronics sometimes are so important because many electronics device such as microcontroller only can read voltage.
Understanding Voltage Divider
Unfortunately, your arduino can sense voltage only from 0V-5V. That’s why voltage divider come in handy.
