I don’t mean to brag, but I have a really great mom. Sadly though, last week she twisted her ankle quite badly. According to her physical therapist, the injury caused damage to one of the nerves in her leg. So, in addition to the more traditional PT remedies (cold and hot packs, stretching exercises, etc), he prescribed a disposable iontophoresis patch, pictured here, for the administration of the anti-inflammatory drug dexamethasone. And the day after she was done with it, my mother, knowing of my fascination with electronics, mailed it to me for disassembly.
Iontophoresis: Pharmacology, Meet Electrical Engineering - [Link]
While LM386 is very popular among hobbyists, it provides the limited output power of only 1 Watt, and for stereo application, two LM386 ICs are required. This project is about making a 5 Watt stereo audio amplifier using the UTC TEA2025 IC chip.
TEA2025: An stereo Audio Amplifier IC - [Link]
XBMC is a cross platform Media Center Application with 10-foot UI. In this project we develop USB port base controller for XBMC application. Main functionality of this controller unit is to provide remote control interface, LCD base player information panel and rotary encoder base controller for XBMC. With this given hardware design and software programs, user may be able to control XBMC without using standard input devices such as keyboard and mouse.
This device is design to work with XBMC Version 10.1 (codename Dharma) or newer versions. Older version of XBMC may not work this system because of the differences in its Web Control Interface. This system is design to work with XBMC – JSON RPC interface.
XBMC USB Controller - [Link]
It provides a quick reference manual for the two most popular Hardware Description Languages (HDL): VHDL and Verilog. This app is written by engineers, for engineers. For every construct in VHDL, our app provides the nearest equivalent in Verilog, and vice-versa (or indicates if there is no direct equivalent).
Experienced custom digital logic designer for FPGA or ASIC? Electrical engineering student just learning the ropes? This app (which runs on iPhone and iPad) includes the following features
Searchable dictionary of every keyword, operator, and data type for both languages.
Handbook provides simple example for every single reference
Common functions in each language
All pre-defined attributes for VHDL (e.g., ‘leftof’)
All primitive gates and drive strengths for Verilog
Filter by language (VHDL, Verilog, or both)
Filter by language elements (keywords, operators, attributes, data types, etc.)
VHDL Ref is a new app for the iPhone, iPad, and iPod Touch. - [Link]
PIC microcontrollers’ Sleep feature is an extremely useful mechanism to minimize power consumption in battery-powered applications. This experimental tutorial from Embedded Lab describes how to put a PIC microcontroller into Sleep mode and then compares the PIC current consumption during Sleep mode and the normal operation mode.
Sleep and Wake PIC microcontrollers - [Link]
Let’s say that you’re trying to drive a few Nixie clock tubes, or you want to make a strobe light. A variable high voltage DC power supply from 50-200+ volts may be required. Transformers are terrific, but difficult to find the right one and a pain to wind. Why not use a boost converter? They’re easy and don’t necessarily require a guru for basic operation. This guide is meant for the individual who wants to build a simple boost converter, and may need refreshing on the theory. It will also help determine what parts will be required.
Boost Converter Intro with Arduino - [Link]
It’s a microcontroller version of the keyboard-input radio transmitter used with the Enigma coding machine. It takes strings of text, turns them into characters, and sends them over an audio signal for wireless transfer (across the room using audio levels, or long distance using radio waves). This mode of sending text over radio is called Hellschreiber, and is more resistant to noise than radio teletype (RTTY) and other modes of its era.
I before E except after Hellschreiber - [Link]
The USB 3.0 Promoter Group has announced a revised power delivery spec that means significant changes in how consumers will be able to power up tablets, notebooks, and a range of other e-devices. The new spec, designed for backwards compatibility with USB 2.0 and support for USB 3.0, promises to deliver up to 100W of power. It’s that capability–of delivering as high as 100 watts of power—that carries the excitement. The jump from 5W 900mA to 100W 20A is expected to extend the use of USB as an instant connection once the spec is implemented. The USB 3.0 Promoter Group is populated by HP, Intel, Microsoft, Renesas Electronics, ST-Ericsson and Texas Instruments.
We’ve built an Arduino derivative with Bluetooth, IrDA, SD Card, servo ports, and RJ telco jacks for plugging in various sensors / controls. With our boards, you can also do FOTA over Bluetooth on your Android phone or desktop (Mac/Linux/Win). We have an App Store repository that lets you download the firmware and FOTA it onto the device, and then interact with it via a user interface.
DaisyWorks: Internet your thing - [Link]