Electronic Cockroach Killer (ART649E)
During hot weather, cockroaches proliferate in certain places, attacking various types of food, especially sweet ones. An environmentally friendly way to eliminate these insects is to use an electronic trap, which kills them without the use of chemicals. The design we describe in this article uses the same principle as the fly traps we see in the meat sections of supermarkets and other establishments: a high-voltage shock.
Two Projects with Ceramic Transducers (ART647E)
Do you know what a ceramic transducer is? Do you know its purpose or how it works? For some, this name might mean something quite critical and unfamiliar; for others, it's just another name for another component. Below, you will learn what a ceramic transducer is and how it works, as well as the opportunity to create two interesting assemblies with it: a police siren and a pressure or knock alarm.
Game Center II (ART646E)
A past project that was very successful and even sold as a kit was the game center. With a circuit capable of randomly drawing one number out of 10, it was a variety of games that could be swapped simply by changing cards. We analyzed the circuit and found that its basics are completely current, but that it can be improved, even operating as a shield or for other applications. We will explore this in this article.
Planning a Workbench (ART645E)
Whether you are a student, hobbyist, maintenance, installation, or development professional, teacher, or researcher, a workbench designed to support the latest technologies is essential to the success of your work. Even when working with older technologies, whether restorers and repairers or with current technologies, there are requirements that must be met for our work to be fast, safe, and efficient. How to plan a workbench is the subject of this article.
Magic Pendulum (ART652E)
What do you think about being able to stop a pendulum's swinging motion with a simple gesture, or even with a beam of light emitted from a flashlight? Without a doubt, if you have some way to achieve this, you will possess the secret to a sensational magic trick to show your friends, or to be a hit at a school play or science fair. If you think it is difficult, you are very wrong: all you need is a basic understanding of electronic assembly techniques.
Percussion Generator (ART648E)
This circuit generates sounds using the computer keyboard, and with it, we'll take a true journey through time. Nine astable oscillators, a sequential counter, and a demultiplexer, controlled by an Assembler program, allow for various musical arrangements or beat box-style beats.
