In this tutorial, we will develop a 5V variable voltage source from Arduino Uno. For that, we are going to use ADC (Analog to Digital Conversion) and PWM (Pulse Width Modulation) features. This ...

This is a simple arduino project for a soil moisture sensor that will light up a LED at a certain moisture level. It uses Arduino Duemilanove microcontroller board. Two wires placed in the soil pot ...

D9 pin as PWM output A0 pin as analog input (for current feedback) GND pin just for GND. R - resistor for current measurement (I have 470 Ohm, I think 300-1000 Ohm would be ok, you need to write ...

In this tutorial i use a voltage divider circuit and Arduino Uno to measure an unkwown resistance. The output of voltage divider is connected to analog port A0, so the input goes from 0 to 1023. With ...