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.
Digital Capacitor (ART644E)
In Issue No. 2, 182, we published the design for a Digital Counter Module that, as mentioned in the article, would serve a multitude of practical applications. Among the applications suggested in that issue, we already published a 32MHz Digital Frequency Counter, a Digital Stopwatch, an Optical Counter, and an Electronic Sorter. Now it is the turn of the Digital Capacitor, a very useful bench top instrument for reading capacitances between 100pF and 10,000pF. Simple to assemble and using common components, the accuracy of the readings depends solely on the adjustments made by the assembler.
Designing and Assembling Transformerless Power Supplies (ART604E)
Transformerless power supplies, or FAST for short, or simply transformer less power supplies, are very useful in low-consumption projects that must be connected to the power supply network, as they eliminate the need for an expensive and bulky component, the power supply transformer. How to design and assemble this type of source is what we will see in this article, which is very useful for those who need sources of up to 12 V with maximum output currents of around 50 mA.
