bidouille.org writes: [via]
The Kvarts DRSB-01 (Кварц ДРСБ-01) is a simple consumer Geiger counter. It does not feature a display of any kind like most modern Geiger counters do, but instead each particle detected by the tube make a very characteristic “click”. It was manufactured in the early 1990’s and is not made any more, but you can still find it commonly on places like eBay. I got mine for about 15€ a few years ago, but unfortunately prices have skyrocketed recently after the events in Fukushima brought back the reality that is radioactivity into everyone’s minds.
Geiger Counter USB Hack – [Link]
This is a USB interface board I’ve built around a PIC 18f4550 microcontroller from Microchip. As many of you probably know, I’ve used my computer’s parallel port to connect many things to my computer. However, most laptops don’t have parallel ports these days, so I needed a way to connect things without a parallel port. This board does exactly that (and actually much, much more). I found a really nice tutorial on building this board here – http://eegeek.net/content/view/13/32/
Homemade USB interface board using a PIC – [Link]
One of the biggest hurdles for the mythTV community seems to be providing an IR receiver so that you can use your remote control with it. I had been using a serial ir receiver but decided to try building my own USB receiver. This is based on the work by Dick Streefland found here: http://www.xs4all.nl/~dicks/avr/usbtiny/
USB IR Receiver – [Link]
Here is an easy an popular way to start using USB in your designs without going into learning the complicated USB protocol. This circuit converts normal USART signals from any microcontroller into USB compatible signals which can be directly connected to the PC. If u r designing a circuit and u need pc interface, then this is the best way, use USB, as the RS232 ports are disappearing from PCs and laptops very fast.
USART-to-USB converter using FT232BM chip – [Link]
So here it is! uPOV with a USB HID connection to modify the message! rucalgary.hackhut.com writes:
So I continuously recived the question… “How do you change the message?” As I answered this many times before, I began to realize that my “you use an ISP programmer along with a bash script in linux” answer wasn’t going to cut it for most people. I started looking at alternatives, and finally settled on an HID implementation. I used Objective Development’s VUSB firmware (a firmware only USB implementation for AVR microcontrollers) along with a few additional components. (ceramic resonator, three resistors, two capacitors, a voltage regulator, and of course the USB mini-B connector) I also added an aditional LED because I could.
USB POV! - [Link]
Here’s a MIDI keyboard interface project from SuLuLab. It uses an Arduino, MIDI Shield, addressable RGB LED strip based on chip HL1606, 5VDC 1.5A PSU for strip supply (USB port current is not enough), and the Arduino’s FastSPI_LED library. [via]
MIDI messages from the keyboard (real or simulated on PC) enter the MIDI Shield’s MIDI IN and are presented to the Arduino serial port. The Arduino firmware interprets the MIDI messages NoteOn NoteOff, associates each key on the five octaves (60 keys) keyboard to a strip LED and lights it with color associated with the note. In the firmware to control the strip we used the FastSPI_LED library that allows you to address every single LED and turn the desired color (R, G, B).
For more details and to download firmware see the SuLuLab website and scroll to bottom of page for English version.
Arduino MIDI RGB display interface – [Link]
blog.makezine.com writes: [via]
Frustrated with a curriculum change away from traditional CS courses in public schools, game developer David Braben built an ultra-low cost single board computer on a USB stick to facilitate a return to programming and learning how computers actually work. Connecting directly to a keyboard, with HDMI out to a monitor, the idea is to build courses around the tiny $25 PC, which is cheap enough to get into the hands of most students. And just because it’s inexpensive doesn’t mean it’s a dog. Sporting a 700MHz ARM 11 with 128MB of RAM and OpenGL ES 2.0 graphics means it has enough power to run Ubuntu.
Raspberry Pi: $25 USB Stick PC – [Link]
Arduino to Twitter over USB [via]
I created a tutorial to guide you through the process of integrating Twitter with your Arduino without an ethernet shield. All you need is an internet-enabled computer. I hope some of you find it helpful. Feel free to offer comments or suggestions.
Arduino to Twitter over USB – [Link]