In this project we will explain how to make a POV clock in an easy way. POV stands for persistence of vision. It is a kind of optical illusion in which a visual image seems to persist even when the rays of light cease to enter our eyes because they are interrupted for very short…
Who likes a weak WiFi signal? We can extend or improve our WiFi signal in the office or at home using specific products, but these need to be placed in precise points for optimal performance. You can use the device shown in this article to measure the strength of your WiFi signal at various points…
In this tutorial we will learn how to register fingerprints and then read them with the biometric sensor and activate a lock. The sensor works with the serial protocol, so it can be used with any microcontroller (Arduino UNO in this case) or development card. The device also has the ability to store up to…
When we use the soldering iron we should avoid breathing the smoke that is created by heating the material, especially if we do it daily or if we use a lead-based solder. And so, in defense of his lungs, Jeremy S Cook added a fume extraction fan to his welding station. However, without proper power…
In this project we will see how to create a 3D printed CNC machine. It’s just a prototype, but once it’s built you will surely be able to build a larger, more accurate one. The principle will be the same, but in this case we use DVD writers stepper motors to control the motion of…
In this project we will see what Tesla coils (TC) are, how they work, a couple of variations and also how to build one in solid state (SSTC) whose purpose is to play music! The image below shows the entire system, consisting of 3 main parts: a switching circuit, a rectifier and an interrupter. By…
In this project we will see how to build a heart rate detection system, we use a pulse sensor and an OLED display, all controlled by an Arduino Nano. The sensor detects the person heartbeat and converts it into electrical signals and pulses. The signals are amplified using a signal conditioning circuit and processed by…
Build a digital soldering station that allows you to perfectly adjust the temperature of the Hakko 907 soldering iron thanks to a PID system. When the system detects that the iron tip temperature is lower than the set point, it will increase the power required to generate heat. When the iron temperature is higher than…
The home security camera does a good job, but it may not work in complete darkness. You also don’t want your gadget to trigger a false alarm if it detects, for example, a cat. In this project we will see how to build a small-scale system that just turns on an LED when it detects…
The project consists of an automatic transistor tester, which allows you to identify the pinout and characteristics of various discrete semiconductors (NPN, PNP, MOSFET transistors, etc.). It is also capable of measuring resistors, capacitors, inductances and diodes. The original project was written in a mix of C and AVR Assembly Code; this instead uses an…
The project consists of a car and a Bluetooth remote controller that allows you to control the movement and speed of the car through the tilt angle (similar to a Nintendo Wii remote). The microcontroller receives acceleration data from the accelerometer, calculates the tilt angle of the remote controller and sends this data via Bluetooth…
An Escape Room is a logic game in which the competitors, once locked up in a themed room, have to look for a way out using every element of the structure and solving codes, puzzles, puzzles and riddles. Escape Rooms can be a lot of fun, even if you have to stay at home in…
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