There are dozens of projects like this one on the web, but it’s nice to be able to chose the one you like most. Nothing special with this AVR ISP programmer, maybe just the idea that the author build it because hi’s hold programmer was working trough serial connection and as most modern devices work on USB he decided to make his programmer work on USB.
So, the solution was to replace the two transistors, that were used to adapt the RS-232 voltage levels to TTL voltage levels, with a USB to RS-232 chip such as FT-232BM.
USB ISP Programmer For AVR: [Link]
If you’re looking for a build-it-yourself, standalone, USB harddrive based MP3 player, this may be of interest to you. Originally conceived as a replacement for a CD player, this unit sits on the shelf next to your stereo and connects via standard RCA line-out audio connectors. Features of the player include:
- Large, back-lit LCD display
- IR remote-control receiver port
- USB 2.0 connection for fast song transfers
- Functions as a USB harddisk
- 24-bit stereo audio out
- Support for fixed & variable bitrate MP3 files to 320 kbps
- Supports harddisks up to 137 GB
This is an open-source project. Full hardware schematics and software source code are freely available on the project site.
Hard-disk Based MP3 Player With USB 2.0 capability: [Link]
This project demonstrates how you can control a stepper motor over USB using a special software. The motor is driven by a PIC18F4550 running with full speed USB interface at 48MHz. The software for the computer was written in Delphi and the code for PIC was written in MPlab. The source files are provided so you can make any adjustments needed.
Stepping Motor Controlled Over USB Interface: [Link] - [via]
The EnvStick is cheap, homemade temperature sensor that plugs into a USB port. It provides a simple way to collect a room’s ambient temperature. Ned, the author made it purely for fun, so don’t expect too much from the project.
USB Temperature Sensor: [Link]
This robot doesn’t look too good, but it servers its purpose, it proves that it can be done at home. The bot its based on Qwerk, a robot processor board very popular these days. The Qwerk is made to control myriad robots; it can control up to four motors and sixteen servos, while interfacing to sensors with eight analog ports, sixteen digital I/O, and an i2c bus. It also has two USB sockets so that robots may include a USB webcam and a wireless 802.11 network adapter.
The home linux robot its built mostly of what was around a computer webcam taken apart and modified to see infrared light, some wheels from a toy airplane, etc.
The Home Linux Robot: [Link]
