Microcontrollers and stuff A blog by Derk Vedelaar


Arduino/Bluetooth/Android controlled Knex car

When I was a kid I played a lot with Knex. Recently I found it again and tried to use the Cyber Knex motors and remote. Of course the batteries of the remote where empty and I had no new ones handy. Time to make my own.


JY-MCU 3208 Game of life arduino code

I finally took the effort to make my game of life code arduino compatible. I can now run the game of life on an arduino and use the displays just as displays. You still need to uplaod empty code to the onboard avr or completely desolder it though.


Precision voltage reference

I recently stumbled upon the chip ref102p (datasheet, pdf). This is an extremely precise voltage reference that gives 10 volt +/- 0.0025v without calibration. I thought this is a great way to test my multimeter (which is an extremely cheap one, because well, I don't need an expensive one).


JY-MCU 3208 Game of Life

After my previous post about the JY-MCU 3208 lattice clock I played around with it and eventually figured I could create the game of life on the display.


Self soldered adxl345

I received some adxl345 chips (2). They where even smaller than I imagined. 5.3mm by 3.3mm. 14 pads to solder. I'm never going to solder that thing. Ok ordered a pcb from ebay (pic) and some caps. See if I can make it work.


JY-MCU 3208 lattice clock

I bought the jy-mcu 3208 lattice clock from dealextreme. It is a matrix display that features a ht1632c display driver and am atmega8 microprocessor. To be able to program the processor i also bought an usbasp dongel on ebay (something similar to this one).

I didn't do much with microprocessors other than the arduino, empty atmega's on which i flashed the arudino bootloader and my previous post. So, this had to change. I figured it all out (at least, i think so) and am writing this post mostly for my own reference.


Minimus avr usb howto compile

I just bought the Minimus AVR usb development board from Deal Extreme (this is the version 1 development board). It is a nice small development board with an AVR microprocessor on board. It is used a lot by Playstation 3 modders and a lot of information can be found about this.
But I was unable to find a nice tutorial about compiling your own project.