The c Moy Headphone Amplifier is a headphone amplifier kit suitable for use with portable audio equipment, smartphones, computers etc. The c Moy is a minimalist headphone amplifier based around a single dual-channel opamp. It is based on a design well-known in the DIY Audio community. We’ve made it into an open source hardware kit …
Introduction Imagine a marathon on a very hot, dusty day when saving every ounce of energy matters to the outcome. This race isn’t half over, but the winner seems certain. The lead looks insurmountable, because this runner can do more with less energy. This runner shines brighter. In the face of heat and competition, this …
Introduction Infrared (IR) can be used for line-of-sight communications over low to moderate range. IR is nice because of the lack of interference (except for sun and compact fluorescent lights) and freedom from FCC regulation. The web site http://tthheessiiss.wordpress.com/2009/08/05/dirt-cheap-wireless/ (Jacob Sikker Remin, 2009) shows how to use a IR remote control receiver and IR LED …
Infrared Communications for Atmel Mega644-1284 microcontrollers Read More »
If you’re like me, after I got my Arduino and performed a final programming on my first chip, I wanted to pull it off my Arduino Duemilanove and put it on my own circuit. This would also free up my Arduino for future projects. The problem was that I’m such an electronics newbie that I didn’t …
Not so long ago, the typical development board was big, bulky, and often handmade. Recently a flood of Lilliputian-size development boards has been released — one for just about any need. We’ve assembled a collection of 10 boards so small you might lose them in the cushions of your couch. Click on to the next …
10 Tiny Development Boards That Are Up to the Task Read More »
I’m a fan of LEDs, lots of LEDs. So here’s a slightly less crass way of using LEDs for decorative purposes. While this is by no means a neat and polished solution, and probably not the first of its kind, however the pulse effect is as far as I have seen unique, and exactly what …
LCD displays are commonly supplied as a module with a built-in driver circuitry usually mounted on a PCB at the rear of the module. While this strengthen the module mechanically, it has some drawbacks such as it increases the thickness of the display module and raises the manufacturing cost. NXP semiconductors describes the Chip-On-Glass technology …
In this intractable we will learn how we can hook up an LCD based on the HD44780 chipset to the SPI bus and drive it with only 3 wires for less than $1. Although I will focus on the HD44780 alphanumeric display in this tutorial, the same principle will work pretty much the same for …
Lithium-ion batteries are sensitive to bad treatment. Fire, explosions, and other hazardous condition may occur when you charge the cell below the margin that the manufacturer defines. Modern battery chargers can manage the hazardous conditions and deny operation when illegal situations occur. This fact doesn’t mean, however, that all cells are bad. In most cases, …
Simple circuit indicates health of lithium-ion batteries Read More »
Aesthetic and relatively massive enclosures from company Festoon are the novelty able to provide an attractive look to your devices. Metal enclosures are a stable part of our offer. We usually choose them, when wanting to produce a device with a higher mechanical rigidity or with a higher resistance to disturbances (EMI shielding) but even …
