Series Hammond 1553 handheld enclosures has sprawled out with smaller relations. Handheld enclosures of the 1553T series with a sufficient space for a keyboard and a display was introduced to you in our recent article HAMMOND 1553T enclosures – keyboard and display in your hand. Enclosure 1553T is ideal for many relatively bigger devices, but […]
HAMMOND 1553TT – keyboard and display even for women´s hands Read More »
Anatomy of a Metal Detector A typical metal detector is light-weight and consists of just a few parts: Stabilizer (optional) – used to keep the unit steady as you sweep it back and forth Control box – contains the circuitry, controls, speaker, batteries and the microprocessor Shaft – connects the control box and the coil;
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By: Alex Danovich,President San Francisco Circuits We live in an exciting time where we see a resurgence in electronics as a hobby. Mass production has wiped out a generation or two of kids learning to build radios from scratch with their mom or dad. In the good old days, not sure when, you had companies
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The art of connecting things is becoming more and more complex every day. In this article, we will look at a method of connecting devices, called Bluetooth, that can streamline the process. A Bluetooth connection is wireless and automatic, and it has a number of interesting features that can simplify our daily lives. The Problem
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A tiny 32 bit Cortex M0+ The LPC810M021FN8 is a very interesting MCU in a 8 pin DIP package, designed to replace its 8 bit counterparts, ideal for hobbyist breadboard or through-hole printed circuit board (PCB). Being such a small and limited MCU, it has met a mixed reception since its announcement by NXP. Some
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While there are many different types of batteries, the basic concept by which they function remains the same. When a device is connected to a battery, a reaction occurs that produces electrical energy. This is known as an electrochemical reaction. Italian physicist Count Alessandro Volta first discovered this process in 1799 when he created a
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In the last part of my tutorial about the A4988 driver, I’m going to explain how to build a controller to adjust speed and rotation direction of a stepper motor. Schematics I used the same setup introduced in a previous post: an Arduino Uno; a LCD Keypad shield; a Pololu A4988 driver mounted on a breadboard; a NEMA17 stepper
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The popularity of mystery clocks is no mystery at all. They’re novelties and great conversation pieces. They are mind-boggling at first glance, and amusingly fascinating once you understand what’s going on. They’re triumphs of imagination and craftsmanship, and they’re often works of decorative art as well. The mystery comes in how these clocks work. They’re
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The Universal Serial Bus (USB) has become the connection scheme of choice for interconnecting different devices, many of them providing human interface support. Support for many different types of peripheral, which can be self- or bus-powered, calls for stringent protection for not just the target device, but also the bus itself. For example, overcurrent protection
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Microcontrollers are hidden inside a surprising number of products these days. If your microwave oven has an LED or LCD screen and a keypad, it contains a microcontroller. All modern automobiles contain at least one microcontroller, and can have as many as six or seven: The engine is controlled by a microcontroller, as are the
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