This project is an Inductance and Capacitance Meter using Microchip’s PIC18F2550 connected to USB. Source code is available on the link below.
PIC18F USB LC Meter – [Link]
V-USB is a software-only implementation of a low-speed USB device for Atmel’s AVR® microcontrollers, making it possible to build USB hardware with almost any AVR® microcontroller, not requiring any additional chip.
V-USB: A Firmware-Only USB Driver for Atmel AVR Microcontrollers – [Link]
USB is very common interface today. If you look around, many of devices today comes with a USB port. Computers, printers, routers, usb keys, etc. All this devices have a USB controller inside. These devices can be divided in two groups:
– USB Host (like a computer, routers, modern LCD TV’s);
– USB Device (like flash drive, mouse, keyboard);
Most of hobby electronic projects still are in RS232 serial communications world. Think in that great market,
Microchip create a very smart line of microcontrollers, USB capable, to move your projects to future. They have great introductory kits, one of them is the “Low Pin Count USB Development Kit”.
USB Low Pin Kit - [Link]
This project is a slide-show forward/backward button in the size of a USB-key.
Those old slide-projector had normally a handy button with a cable where you could advance to the next slide or go one back. I was looking for something like that. I have tried to use a USB wheel mouse but it is not the same. You click accidentally on the wrong button and you get a context menu or you scroll too many slides at once.
A USB slide show presenter – [Link]
This project shows how to build a GPIB to USB Converter named Pic-Plot2. With this unit you are able to obtain the screen plots of a GPIB instrument to the screen of a laptop without complex software, following this low cost solution. The interface is based on a PIC16F628 microcontroller and an FT23R chip. Check schematics and software on the link below. [via]
Pic-Plot2: GPIB to USB Converter – [Link]
Lithium Polymer Batteries are a very common source of power today. Many electronics gadgets have one inside, and they have some reasonable features. I’ve bought great batteries, with different sizes and capacities for my electronics projects. So long I’m using this batteries, coming the problem: charge them.
USB Single Cell LiPoly Charger - [Link]
One of the most common way to interface a microcontroler to a computer used to be serial port. But right now, serial port have been replaced with USB on most computers. A common way to fix this issue is to use a USB to TTL converter or a USB to RS232 converter + MAX232. That’s fine but :
Really cheap USB to TTL on Atmega - [Link]
We came across this USB soldering iron over make blog and thought it will be interesting to post about. This soldering iron is plugged in two USB ports because it draws lot of power. After plugged in it heat up in 20sec and maintains enough heat to solder your gadgets. Getlofi sells them for about $25. Main features are:
- Precision Tip, Ultra Portable
- USB Port or 9 Volt Battery power via included cables!
- Heats up in less than 20 Sec
- On-Off Switch
- Bright LED
- Cleaning sponge
USB soldering iron – [Link]
This instructable show us how to build the smallest USB led! It uses a USB plug made with a piece of perfboard, a resistor and of course a led. Basic soldering skills are required to build your own. Follow the instructions on the link below.
The Smallest USB LED - [Link]
This device is a USB port tester that allows you to check any USB port of your computer. To check the operation of USB just plug it and if USB port is working correctly the green led should lit. Also you should receive a “New device detected” message on your operation system. The circuit is very simple to build using a few common components. Check construction details on the instructable link below.
USB tester - [Link]