Category Archives: Arduino.

All about my proceedings in the “arduino area”.

Note to self: 26.0V >> 2.60V — A short ChipQuik review

Nothing good can come from a freak idea after midnight !

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V3.04 PCBs from MakePCB have arrived

I’ve waited for 5 weeks for the 2nd batch of the 64-pixel RGB matrix controller boards. This time I ordered from MakePCB as I wanted to test another PCB manufacturer. Also I couldn’t get gold plated pads from GoldPhoenix for … Continue reading

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IKEA SAMTID modification — part 1

I have 3 Ikea Samtid lamps. They’re affordable, useful and the design is timeless. One is in my living room and started to bore me. That has to change. As the lamp can be dismantled very easily it’s begging for … Continue reading

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Expli.de – electronics competition — my my ;-)

I’m happily awaiting the prize ;-) Now I’ll finally be able to learn to work with AVRs “the right way” (LOL). For links to the other awarded projects, just click here. “myAVR MK2 USB PLUS” development KIT – kindly sponsored … Continue reading

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128 = 64 x 2 — Extending to larger matrix displays

I haven’t had the nerve to test if my 8×8 PWM code could cope with a double sized matrix, but it turns out someone else has already had fun doing that. Have a look at dirk’s blog for more information. … Continue reading

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Showing live video on my 64-pixel display

Hi again! I really can’t believe it myself, but it works just fine ;-) All of this is coded in Perl and is only tested on linux. The program uses these modules, if you don’t have them install from CPAN … Continue reading

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Interactively controlled animation on a 64-pixel RGB LED display

OK, enough with this pompous title. I’ll just show how to hook up a normal potentiometer to PORTC, PIN2 of the ATmega168/328 microcontroller and control which image is displayed on the matrix. This pin works as an analog to digital … Continue reading

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ModernDevice USB BUB — Review

For uploading to “home made Arduinos” or other boards not equipped with an USB/TTL-serial converter chip like the Boarduino, there’s a few adapters out there. One of which is the standard FTDI USB/TTL-serial cable, which costs 20$ in the USA … Continue reading

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Displaying images on 8×8 RGB LED displays

Just a short proof of principle thing, badly coded and terribly slow, but it works :-) Images must be converted to the RAW PPM format using e.g. GIMP. If you think of using ImageMagick and convert: doesn’t work properly ! … Continue reading

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Getting auto reset to work with FTDI cables on Linux (MAC)

Update: please use avrdude 5.11 or later with “-c arduino” and your problems are gone! Before you start, make sure you have the perl module Device::SerialPort installed ! On Debian based systems, you can easily do that by typing:

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Using a standard Arduino to program V3 Matrix boards

A comment by Andy reminded me of the fact that a standard Arduino (non SMD types) comes with the FTDI chip and therefore can be used as a USB to TTL serial programmer too :-) To make it work you … Continue reading

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V3 prototypes for sale

Hi, I need to get rid of my V3 prototypes ! I’ve got exactly 3 (all gone) fully assembled and tested boards + RGB LED matrix. So if anybody wants them, “The early bird catches the worm”. I’d be happy … Continue reading

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Experimenting with the PORTC/D connectors on V3 boards: I²C

First let’s have a look at the pinout of the connectors labeled as PORTC and PORTD on the V3 boards. “PORTC” : PIN NAME FUNCTION ARDUINO PIN ARDUINO PIN 1 PC0 ADC0 analog IN 0 digital IN/OUT 14 2 PC1 … Continue reading

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Flashing the bootloader with USBtinyISP/avrdude

First make sure the chip sits on the PCB properly and the quartz with load capacitors is on there too. Then connect to the board with the 6pin header. Pin 1 is marked by the red wire. Make sure it … Continue reading

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8×8 RGB Matrix V3 + KICAD + SMD — part 2

Lost in some office, surrounded by clueless clerks, and low on patience… This is my adaption of the famous tag line of Army of Darkness: “Lost in time, surrounded by evil, and low on gas…”, which describes what I’ve been … Continue reading

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8×8 RGB Matrix V3 + KICAD + SMD — part 1

Now that I’ve started to work with KICAD, I’ve made the transistion to SMD parts and finally got my switch back. I hade to remove it in V2 as the DIP parts took too much space. The quartz is back … Continue reading

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8×8 RGB Matrix V2 – KICAD test

I’ve converted the files to KICAD. Due to size limitations of my project housing (60x60mm), I had to remove one switch which was connected to Arduino pin 7. All code that uses “__button” should be removed. The remaining one is … Continue reading

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Meggy Jr RGB made it into German newspapers

So our media have finally seen the light. Geeks don’t want XBoxes for christmas, but something that’s fun making it. Meggy Jr RGB KITs are available at Evilmadscientist.com starting at about 50€. You can also get Arduino libraries there to … Continue reading

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Wooden case for the LED matrix projects

So I’ve decided to put the LED matrix projects into nice good looking wooden cases. Thought of making it myself, but I just don’t have the tools nor the space for making precision cuts and milling grooves and so on. … Continue reading

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Simple linux load monitor using the 8×8 RGB Matrix

Now that I’ve finished some of the scientific work that was monopolizing my time, here’s some geeky and nerdy gadget for Linux fans. BTW, why is it that trying to find out what “geeky and nerdy” actually means, is also … Continue reading

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