Generating variable voltage with Arduino, ESP8266 and ESP32
Let's see how we can generate a variable voltage with Arduino, ESP8266 and ESP32 using different techniques.
Electronics
Electronic charging with MOSFET, easy
We are going to build a constant current variable electronic load, easy and with few components, to do experiments.
Tutorial: Temperature-controlled variable speed fan for Raspberry Pi
Do you, like me, want to reduce (or even eliminate) the annoying noise of the Raspberry Pi 4 fan? If so, here is the ultimate solution. Easy and cheap.
PWM driver with MOSFET transistor
Learn how to build, and how it works, a PWM driver with a MOSFET transistor!
PWM driver with BJT transistor
I will explain how to build, and how it works, a PWM controller or driver with a "normal" bipolar transistor.
How to repair your switching power supply
Do you need to repair your switching power supply? Here's how you can repair a malfunctioning power supply yourself.
Loto Instruments OSC482 USB Oscilloscope
The Loto Instruments OSC482 oscilloscope is one of the most frequently used measuring instruments in my laboratory. I am delighted with it and it has become a must-have.
Controlling the speed of a fan with PWM
We are going to see how to control the speed of a fan with PWM. What it consists of and why to do it this way.
What is a PWM (Pulse Width Modulation) signal?
PWM signals are increasingly used in computers and microcontrollers (Arduino or ESP8266). Let's see what they are in an understandable way!