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28 Feb 2008


This is small blinking LED demo application for LPC2103 Olimex board. Project compilation was made under Linux by using GCC tools and debugged openOCD debugging software.

Benedikt Sauter describes the process of building project with arm-elf-gcc and debugging with openOCD via JTAG interface. Follow these steps and you will make your first ARM7 project under Linux. Necessary project files can be downloaded here. [via]

Blinking LED with LPC2103 under Linux – [Link]

28 Feb 2008


This is cool project to pay attention to. It can be used for PC modding or elsewhere where scrolling text effects are needed. Display is built of 50×7 LEDs that is controlled by AVR AT90S2313 microcontroller (may be substituted by ATtiny2313).

Text can be sent from computer via RS232 port or displayed from external EEPROM 2k memory where 768 characters can be stored. Fonts set of 256 different characters can also be programmed and mast be written to EEPROM before sending text to display. Hardware project with 3mm LEDs can be downloaded here. And latest firmware here. There might be minor changes are needed to adapt to newer WinAVR and ATtiny2313 microcontroller. [via]

Scrolling text effect on a LED matrix display – [Link]

28 Feb 2008


This project uses a standard (PDIP) PIC16F684 as well as a standard thermistor. It will tell the temperature between 0 and 140 farenheit. The temperature is displayed on a 3 digit, 7 segment display. This project is actually quite easy to build; the hardest part is calibrating the thermistor…

 It is a thermometer with a digital readout. It uses a PIC16F684 and a typical thermistor. I have included step by step instructions as well as source code, layouts, artwork etc. Enjoy

PIC16F684 Digital Thermometer – [Link]

28 Feb 2008


This project was born out of a need for buttons that can be used on a solderless breadboard. I used to solder wires onto a normal push button switch. Not only were they big and clunky, but they would always break as well. I then settled on this design and have never looked back.

It is a tactile button that can easily be put on a solderless breadboard. No more breaking the metal ‘feet’ of the button. No more bending wires, trying to stick a big pushbutton into the prototype board. This project is simple and very useful. Step by step instructions and pictures after the link…

Protoboard Button – [Link]

28 Feb 2008


Keith writes:

I still want to find a small LCD module for the LED calculator, so I can fit the whole thing into a box with a footprint about the size of a deck of cards. But for prototyping, I have a stack of 2×16 LCD modules about 3 1/2″ wide (viewable about 2 1/2″) from Slim, and Wednesday night I got one hooked up and working.

LED Calculator Prototyped with LCD – [Link]

LED Calculator Breadboarded – [Link]

Project Idea: LED Calculator – [Link]

28 Feb 2008


Keith writes:

An Arduino “shield” is a PC board made to plug into the top of the Arduino, covering it (hence the name) and extending the Arduino signals to provide some extra functionality. Shields I know about are prototyping shields (”protoshields”), with a tiny breadboard on top; motor control, with H-bridge drivers to run motors, servos, and steppers; and ethernet, with a Lantronix Xport ethernet interface onboard. (I know there are shields from places other than Adafruit, but I really like supporting Lady Ada’s open-source hardware lifestyle, so I tend to look there first.)

Keith’s Arduino Shield – [Link]

28 Feb 2008


This is a great how-to on building a GPS system for your DSLR camera. The pictures are tagged with the exact GPS coordinates for later reference. Nice work!

This version eliminates the need for the expensive MC-35 and even the special 10-pin connector. I’ve opted for a quick GPS receiver and encased everything in a small black box with a flash shoe mount. Because it is powered through the camera’s power source, a switch on the side of the box turns off the GPS. Version 3 should include a battery, rechargeable through a USB connection. [via]

DIY – GPS Camera attachment – [Link]

28 Feb 2008


Here is how to make some nice little tweezers from recycled circuit boards. You can even wire them up to your multimeter and check the resistance of your components. This would have been a popular tool at the last MAKE:NYC meeting. [via]

Ever since I started salvaging SMT components, I thought it’d be great to have a pair of tweezers wired as meter probes — grab the component, pick it up to put away, and check its value all at the same time. There actually are such things available, but the ones I’ve found start at $35 with a custom connector for that manufacturer’s meter. Not much to my liking.

Make SMT probe Tweezers – [Link]

28 Feb 2008


Here’s a twitter-free version of how to get plants to indicate they need water using about $1.50 in parts, thanks Ben! [via]

Low-tech plant watering indicator – [Link]

28 Feb 2008


Mike Biel wrote this handy web app for planning out LED projects using the EMS “Peggy” board. Great for preparing your next big marketing campaign! [via]

Peggy Planner – [Link]





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