This is a simple square-wave generator that basically uses the TimerOne library allow you to generate a PWM signal at pin 9.

3-channel voltmeter with the ability to measure both negative & positive voltages on the same circuit or 3 different circuits simultaneously

There are numerous examples of how to connect button switches via an external interrupt. This example offers an alternative approach.

If you need to debug your Arduino WifiNINA project remotely, plot charts of monitoring data, and more, this is the project for you...

Relay VS Transistor.

Discharge a fully charged Lithium-Ion cell through a resistor while measuring the current flowing through the resistor to calculate capacity

One port to read them all!

A very simple but useful device for your lab.

This device serves for accurate measurement of small resistances in the range of 0.1 ohm up to 50 ohms.

You'll learn how to communicate two Arduinos via RS485.

"how to hook NRF24 Modules with an Arduino Correctly without killing the module"

Another simple to build useful instrument in you lab.

You have a fan, but you don't know how to control it? Then you're right here.

Simple to build and useful instrument for your lab.

Inexpensive, precision, autorange capacitance meter with a large range.

Here I'd like to explain the version 2 of my library EMailSender, now allow attachments and support Arduino, esp32 and esp8266.

The device is sufficiently accurate and uses minimum number of external components.

A cheap $10 UPDI programmer for Mircochip's new avrTiny processors.

I am going to present an easy way to know the values of resistors without reading the color bands on them. You'll never need to guessing!

Measure and record mains frequency on the SD card along with the timestamp.

A useful tool for accurately measuring long distances.

How to connect incremental encoders for industrial use with RS-422 interface to an Arduino UNO.

An after-work project conjures you out of the box a precise clock on the windowsill with inexpensive components

Try GDB debugging on your Arduino Uno without an external debugger, so you can solve those bugs and get your project released!