Tutorials and Projects

Dive into the world of microcontrollers and electronics.
Discover tutorials and projects on DevXplained and inspire yourself for your own.

Diodes as Input Protection
They are a very effective protection against over voltage and reverse polarity. Let's look at how diodes can be used as input protection.
Flyback Diodes
It is a necessary component in many circuits with inductive loads: the flyback diode.
Full-Wave Bridge Rectifier
It is used in many products and is de facto the standard rectifier: the full-wave bridge rectifier. Let's discover how it works.
Half-Wave Rectifier
A popular application for diodes are rectifier circuits. Today, we are going to look at a simple half-wave rectifier.
Low Voltage AC Source (Summary)
Let's look back at what we learned in this project series and talk about which solution fits which use case.
Low Voltage AC Source (Part 10)
Last time we built an AC source using a transistor H-bridge. This time, we replace the transistors with MOSFETs to improve the efficiency.
Low Voltage AC Source (Part 9)
We built ourselves a working, but quite complex AC source. However, our solution is not the only possible one.
Low Voltage AC Source (Part 6)
In the last part of this project, we used an op amp to increase the current. This time we are going to increase the output voltage.
Low Voltage AC Source (Part 5)
After we learned about different ways to generate a sine wave, it is now time to speak about amplifying the output signal.
Low Voltage AC Source (Part 4)
Today, we are going to look at a third method for generating a sine wave with an Arduino: using the Arduino's PWM output as DAC.
Low Voltage AC Source (Part 3)
We already created a sine wave using a DAC. Today, we are going to try out another method: transforming a square wave into a sine wave.
Low Voltage AC Source (Part 2)
Let's move on and generate a sine wave signal for our AC source. Our first approach: using a DAC.
Low Voltage AC Source (Part 1)
Normally we power our circuits with DC. For experimenting with rectifiers, however, we need an AC source. So, let's build one!
Alternating Current
Before we look at rectifier circuits, let's take a brief look at alternating current.
Reverse Polarity Protection
A reverse voltage can easily damage electronic circuits. Let's look at simple reverse polarity protection circuits using diodes.
Diodes
A diode is like a one-way road for electric current. Let's have a look at this simple semiconductor components.
P-N Junction
Let's look at the foundation for transistors, diodes and many other semiconductor components: the p-n junction.
Light Dependent Resistors
Light dependent resistors are an easy solution for reacting to brightness changes. Let's discover their properties!
Semiconductors
A world without semiconductor components has become unthinkable. But what are they and what makes them that special?
Temperature Measurement with NTCs
NTCs are often used as temperature sensors. To use them, we need to know how to calculate a temperature value out of the measured resistance.