When I was looking for some lamps for my new home I noticed, that barely no LED based lighting products are available for serious lightning at home. Those available seem to be more like decoration. Therefore I ordered a LED panel in the internet. It has 600 LEDs and the color temperature is 3000 K.… Continue reading LED based lighting at home? Yes!
I bought an Apple Wirless Keyboard today. It uses Bluetooth to communcate and can so far as I know also be used with ordinary windows computers. First, I paired the keyboard with my iPad. This procedure is very simple. Switch on the keyboard and then go to the Bluetooth settings in the iPad. There, chose… Continue reading using Apple’s Wireless Keyboard with an iPad
The AVR ISP mkII does not support the AT90S8515 by default for programing. There s a simple workaround for that: Go to the path where your Atmel stuff is installed. In my case it is: C:Program Files (x86)atmelAVR ToolsPartdescriptionfiles Look for the file AT90S8515.xml Locate the <ICE_SETTINGS> part and change the <MODULE_LIST> to [SIMULATOR:STK500:STK500_2:AVRISPmkII] and… Continue reading program AT90S8515 with AVRISP mkII
There was a strange bug I found which took me ages to find. I was implementing some stuff on a Atmel A90S8515 microcontroller. This device is quite old and has very limited memory. Both Flash and RAM. The problem occurred when sprintf from the standard library was called. When called, any internal variables were changed… Continue reading embedded stack collision with the variable-memory
A problem I had multiple times was: I reuse software from the internet, but when i use the software / simulate it, it is constantly resetting! The reason why this is happening is (or can be) undefined reset vectors. This means, the hardware raises an interrupt, which is not hadled by your software. Therefore, make… Continue reading my atmel microcontroller is continuously reseting
For some benchmarks it can be important to have a system operating on just a specific number of CPU cores. To find out how many you have, just count them by: $ ls -l /sys/devices/system/cpu/ Switching a core off is just as easy as echo 0 > /sys/devices/system/cpu/cpu7/online which would switch off core 7. For… Continue reading switch off cpu cores in ubuntu/linux
This is a small project i did several years ago. The board basically consist of 4 7-segment displays some resistors and 4 transistors and last but not least a PIC 16F628. This microcintroller from Microchip was my favourite one because they are robust and easy to use. They can be clocked using an internal clock… Continue reading simple digital clock based on PIC 16F628
How to pimp a kickboard? Take a two ps two stroke motor from a handy lawn-mower and some pieces of metal and welde it all together… Did it work? Well no. The conversion from the motor to the axis of the small rear-wheel was not done thoughtfully. The motor is fast but not powerful, therefore… Continue reading Motorized kickboard