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11 Oct 2010

RoboProgrammer is a robot able to automatic program mcu chips. It takes the DIP chips using vacuum and programs them one by one using the Arduino board. Check the video to see how it works.

RoboProgrammer: Automatic MCU chip programmer – [Link]

11 Oct 2010

This instructable shows how to build your own multi function wireless camera controller. It’s based around an AVR and is able to control your DSLR or point and shoot camera using IR signal. Features are:

  • Single shot mode
  • Interval (time lapse) mode
  • Triggered shot (trigger from external sensor) mode with variable conditions
  • Included sensor designs – light, sound (many more possible!)
  • Total cost – under £25 (excluding tools)
  • LCD Display for easy change of settings
  • Compatible with Nikon/Canon (coded), potential support (untested) for Olympus/Pentax
  • No firmware modification needed
  • Uses IR so is both wireless and doesn’t damage your camera

DIY multi-function wireless camera controller – [Link]

11 Oct 2010

The Hand Steadiness Tester is a game which tests the steadiness of your hand. The player has to take the ring from one end to another end without touching it to the wire. In this the player gets 4 turns. If the player touches the wire 4 times he has to reset the game & start the whole game from the beginning.

This project consists of IC 4017, a Buzzer, a Relay, some resistors, a Push button and 4 LEDs. There is also a PCB layout given. There are many types of Hand Steadiness Testers which are very simple. This New Hand Steadiness Tester is more advanced.

Hand Steadiness Tester – [Link]

11 Oct 2010

“Should I cut the blue wire… or the red…?”
This is a very common phrase in many movies when the action hero has a bomb in front of him with little time left and he has to choose which wire to cut and stop the bomb from exploding saving millions of people.

This game is just that… a count down timer and 4 wires of different colors.
The player has to remove each wire until it deactivates the bomb.

Bomb Game - [Link]

10 Oct 2010

Arduino is well known among electronic hobbyists for it’s simplicity. Now it’s time for two new boards. Arduino has introduced two new boards Arduino Uno and Arduino Mega2560 introducing significant upgrades in Arduino concept. The biggest change is USB to serial converter as it doesn’t use FTDI chip FT232RL but Atmega8U2 that has hardware USB interface. Arduino also decided to change bootloader with new Optiboot firmware that brings some improvements as well. New Arduino boards are still compatible to all shields and also code can be ported from older versions. Check details on the links below.

Arduino introduces two new boards – Uno and Mega2560 – [Link1 + Link2]

10 Oct 2010

This project shows how to build a STK500 AVR ISP programmer with USB support. It uses FT232BL chip to implement USB to serial converter and ATmega8 in DIP package. This programmer is a clone of original AVR STK500 programmer, it works with AVRStudio and AVRDude and all main platforms including Windows, Linux, BSD and MacOS X. Check schematics and PCB on the link below.

STK500 compatible AVRUSB programmer - [Link]

10 Oct 2010

This project shows how to build a constant current  source based on two LM317 ICs. The purpose was to power two sets of 28 LED’s tied in parallel from a 12V source. The PCB design is done on Eagle and the current is set to 20mA for each led so that is 560mA for each set of LED’s. Check the design on the link below.

LM317 constant current source - [Link]

9 Oct 2010

I have been using the toner transfer method for about 9 years with great results. Occasionally I would need a board with finer traces and I would use UV method. My exposure setup allowed only a single sided board to be made and it was composed of a 30cm UV tube, some holders, a table, board and film. Exposure time was rather long as the tube was far away from the board.A few months ago I was looking for some LEDs at one of my suppliers and found that the also had UV LEDs. My mind went directly to upgrading my not so great setup, so I began looking on the internet for info. It turns out some other people have done it, and this instructable confirmed it was really possible. A LED UV box has a clear advantage over a tube one: it can be made in any size, depending on the needs.I bought 25 LEDs and began to experiment. This way I was able to find a compromise between LED density (spacing), distance between LEDs and board and cost. I wanted something compact, I don’t make large PCBs and those 30cm tubes were not right for this job.

LED UV exposure box - [Link]

9 Oct 2010

This article is about building an inter MCU/PIC/microcontroller mutex/lock, allowing to have several distinct cores (of any kind) working together and using a single resource without conflict.

Right now, the board and schematics that are described in this post can handle up to 4 MCU cores (of any kind), letting them to access/use a single resource without conflict. The principle could be easily extended to handle more cores or more resources. For my own prototypes, I use several PIClock boards when the AVRs have to access several resources. You can find Eagle files, PCB, videos, pics, library and code on the link below.

PIClock4: An inter MCU/PIC/microcontroller mutex/lock - [Link]

9 Oct 2010

This project shows how to build a simple but efficient PWM LED light dimmer circuit.

LEDs (light emitting diodes) are very sensitive components – exceed their rated current or voltage and their lifespan can be slashed from 50,000+ hours to a microsecond. LEDs are current-driven * which means that the intensity of the light they generate depends on the amount of electric current flowing them.

PWM LED Dimmer Circuit - [Link]





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