This is a high tech Business Card that you plug directly on USB. There is a ATtiny85 microcontroller on the business card that becomes an USB keyboard pre-programmed to type out text when it detects that CAPS-LOCK has been pressed a few times. V-USB is used so that the ATtiny85 microcontroller can become an USB keyboard.
USB Business Card - [Link]
This easy-to-build electronic device allows you to take a screen-shot of your calculator display and show it on an NTSC or PAL television set. The TV Demonstrator can be used with the TI-82, TI-83 and TI-83+ calculators. The unit is based on ATmega168 microcontroller running at 20MHz. Check schematic and source code on the link below.
TV Demonstrator - [Link]
This article explains how to design a step up DC-DC converter using TPS61200 IC. It is powered from a single AA battery and produce an output voltage of 5V.
Designing DC-DC converters using TI TPS61200 controller - [Link]
This project is a 8×8 LED matrix controlled by an Arduino using 4 shift registers. The shift registers are 8-bit wide and are easily interfaced with the SPI protocol. Pulse width modulation is used to mix the colors.
8×8 RGB LED Matrix - [Link]
This project shows how to build an Open source hardware GPS based on GeoShield and Arduino and if you combine it and a TouchShield Slide, you have a completely portable DIY GPS. Check details of this project on the link below.
Using the GeoShield to build an Open Source Hardware GPS – [Link]
These are two new prototyping boards based on ATtiny25 and ATtiny2313 Atmel microcontrollers. They include most of the standard components like a reset button, an ISP header and also they have a prototyping area to build your own circuit. Even a 3 AA cell battery holder with on/off switch is included in the kit. Check details on the link below.
Tiny Proto Boards – [Link]
This article is a short review of WELLER WSM 1 soldering station by blog.spitzenpfeil.org. The WSM 1 can be adjusted from 100°C to 400°C and packs a whoppin’ 40Watt heating element into the RT 3 tip. It comes with these parts: 12V, 50W switching power supply (no power switch), main unit (no power switch, GND plug), soldering pencil, soldering tip, soldering stand with brass cleaner.
Weller WSM 1 Soldering Station – A short review – [Link]
MOSIS, short for Metal Oxide Semiconductor Implementation Service is a service that enables you to share wafer space on the fabrication process of a semiconductor. That is a batch order service for custom ICs with reduced manufacturing cost. In practice you share the costs of a single IC fabrication run with other designers. This service is mainly available for Universities and start up companies but Scot Satre of Satre Electronics has used this service for his ASIC ICs.
DIY Integrated Circuit Design with MOSIS - [Link]