Arduino based POV globe capable of displaying monocolour bitmaps upto 72 pixels high and x width. (uses 72 LEDs, and one input to get rotation speed)
Arduino byte array for images are generated using the c# program included in this project
Image displayed is synch’d to speed of motor using a reed switch, this allows image to display around hole globe correctly, and maintain a constant position.
Code has been added to move the image slowly (so globe rotates nicely)
POV Globe using arduino (atmega328P) and 72 SMD Leds – [Link]
The following construction allows a simple cable tester to determine whether the cable network is present in high-frequency signal from the source. It is a contactless version of the tester to detect the presence of a signal at distances up to 2m. It can be used to control all types of signal cables, such as divorce Ethernet,modem connections, digital TV, etc. The circuit lights an LED at the moment it accepts RF energy around the cable.
Network Cable Tester – [Link]
Simon has created an servo switcher for use on autonomous vehicles. designed to allow manual control if the autonomous controller fails. Using a pic12f683 and 4066 analog switch. source code and board files are available on his website.
Autonomous servo switcher – [Link]
Here’s a simple CPLD tutorial by Bitcycle.org which discusses detailed steps in the design and programming of a beginners first CPLD project. The project is adapted from Xilinx app note XAPP078, “XC9536 ISP Demo Board”.
A beginner’s CPLD tutorial – [Link]
OSHW Logo Public VOTE! [via]
IT’S TIME TO CAST YOUR VOTE! On February 10th, 2011, we launched the Open Hardware Definition v1.0, and launched a competition to select an OSHW Logo. Over 129 submissions have come in over 2 weeks, and a very active discussion on the forums.
The selection of the OSHW Definition logo occurred in 2 stages:
First, an invited selection committee reviewed and narrowed down the submissions (over 129) to the top 10 logos. The selection committee consisted of some of the most instrumental people in pushing forward/developing/writing/promoting the Open Hardware Definition (full list of members can be found here).
Now we open those 10 logos to a PUBLIC VOTE and have the community select the top logo. Cast your vote here!
And don’t forget to tweet, retweet, promote, forward. Let the OSHW community make its voice heard!
OSHW Logo Public VOTE! – [Link]
We have had a lot of tutorials on electronic parts and Arduino lately, so we wanted to mix it up with some tutorials on the tools we use here every day at Adafruit. We have a very streamlined operation here and a lot of that has to do with the technology we’ve cooked into the business!
This tutorial is for the barcode scanner we use for shipping invoices as part of our custom shipping system. they can ‘talk’ rs-232 serial, ps/2 or USB so they are possible to connect to an embedded system. we have some usb HID interface example code as well for reading data directly from the barcode scanner.
Barcode scanners for a maker business – [Link]
From IEEE Spectrum: [via]
Mobile phones where the batteries run down in a few hours are really annoying but I think dropped calls from bad reception runs a close second in my annoyance scale.
I may not have to wait that long if research at the University of Illinois in making a 3D antenna for mobile phones can successfully make it commercially available cell phones.
The research, which was initially published in the Wiley journal Advanced Materials, employed an ink jet printing method that used silver nanoparticles and were sprayed on the inside or the ourside of a small hemispherical dome.
3D Printing Cellphone Antennae – [Link]
Steve Lodefink shows us this awesome World Control Panel he built with his son. [via]
My son Harlan and his friend love to play “agents” and he asked me if we coud build “a panel that has a bunch of switches that turn on some random lights”. We worked on it for about 3 weeks, and this is what we came up with. The panel boasts the following features:
World Control Panel – [Link]