Air Pressure is literally all around you! Today we wil be testing three inexpensive yet accurate air pressure sensors – the MS8607, BME280 and LPS25.
All of these sensors are on similar Adafruit modules. We will l try them out with a variety of microcontrollers, and we’ll code in C++ and MicroPython.
Table of Contents1 Introduction2 PWM Fan Control2.1 Pulse Width Modulation (PWM)2.2 Common DC Fans2.2.1 2-Wire Fans2.2.2 3-Wire Fans2.2.3 4-Wire Fans3 Simple Fan Control3.1 ESP32 Fan Hookup3.2 Fan Speed Control Code4 Tachometer4.1 Tachometer Code4.2 Temperature Controlled Fan4.3 Temperature Controlled Fan Hookup4.4
Digital Potentiometers, or “DigiPots”, are exactly what you think they are – potentiometers whose wiper position is set using a digital signal instead of a mechanical shaft or slider.
Today we will see how to use Digital Potentiometers and we’ll build a couple of projects. We’ll build a remote-controlled audio volume system and a variable power supply whose output voltage can be set with a web-based interface.
Looking for a power supply for your next project? How about one that can deliver up to 20 volt’s at 5 amps?
USB-PD is a technology that permits USB power supplies and chargers to deliver multiple voltages and currents. Today we wil learn how to use USB-PD in our projects.
Diodes are the oldest and most elementary semiconductor. They are also among the most useful, and there are a variety of diodes to do everything from convert AC to DC to detecting radio waves and to producing light.
Today we wil take a look at diodes. We’ll see how they work, and how to use them.
It’s time we took a fresh look at infrared remote controls, so here is everything you need to know about using IR remote controls with microcontrollers.
Learn how to receive, decode and send IR signals, including ones from those hard-to-decode remotes like air conditioners.
Examples with both an Arduino and ESP32.
LoRa is a Long Range radio system that is inexpensive and free to use. You can achieve great distances with a simple wire antenna, and LoRa is very easy to use.
Today we will see how LoRa works and how we can use LoRa modules to communicate between Arduino, ESP32 and Raspberry Pi Pico boards.
We’ll also build a data-gathering system that you can easily expand upon.
Operational Amplifiers, or “op-amps”, are fundamental analog electronics building blocks that are used in both analog and digital designs. And if you are not using them, it’s about time you started!
Op-amps can be wired in dozens of different configurations, they are very versatile.< /p>
Let’s learn more about using Operational Amplifiers.
Learn to use seven different DC motor drivers with an Arduino Uno.
We’ll see how to put these to use with motors of all sizes, and of course we have hookup diagrams and code samples!
Linear DC Power supplies are no longer as common as switching supplies, but they are still a good choice for many applications.
Today we will learn how linear power supplies work, how they differ from switching power supplies, and how to use voltage regulator modules.
We will then construct a DC Power Supply suitable for use on the workbench.