I have some PIC18F4550′s lying around, and I want to play with the USB features of this chip, therefore I made this breakout board. It contains enough components to get the PICMicro running, and nothing more, all the pins are routed to pin-headers to use with an experimenter board.
Features:
Schematic
PCB
Eagle files: PIC18F4550 USB ICSP breakout board
I never really caught on to the Arduino craze, not because of any dislikes as such, but because I was familiar with Microchips PICMICRO range. I had the parts, the programmer, and the knowledge to program them in both asm and C, so I guess I have had no need for the Arduino platform.
It turns out that the Arduino IDE has been ported to both the Stellaris Launchpad, and the MSP430 Launchpad from Texas Instruments. and is called Energia. This is nice, since it is then quite easy to port the vast amount of sketches and libraries from the Arduino IDE to Energia IDE and the Texas Instruments Launchpads.
First to run Energia, 32-bit java support is needed, so
app-emulation/emul-linux-x86-java
needs to be emerged. When running Energia you must make sure
emul-linux-x86-java-1.6
is selected as user vm with eselect. Create a file called /etc/udev/rules.d/62-stellarpad.rules with these contents:
ATTRS{idVendor}=="1cbe", ATTRS{idProduct}=="00fd", MODE="0660", GROUP="plugdev"
Reload udev and add yourself to the “plugdev” group, plug-in in the Launchpad and you should be good to go!
The server and this page have been offline for 815 days since I have had no reasonable internet connection. But now I am back online, and for most parts ready for primetime again.
While designing a fan control into another microcontroller project, I stumpled upon this nice design using only an external diode and capacitor. I used a 1N4148 standard diode and a 560pf capacitor.
I will walk through copying a bootable Windows 7 installation from a VirtualBox VM to real iron.
Insert an external hard drive in the USB port and share it with my Windows 7 VM. Ask windows to make a system image “Control Panel -> Back up your computer -> Create system image”, and save it to the external hard drive.
Boot the Windows 7 install disk, click through, and select “Repair windows installation”. The drives that you do not put on the exclude list, will be repartitioned and formatted, so make sure to exclude everything you want to keep. Let it chew on your backup, and when done, boot Windows.
On Gentoo I needed to point the configure script at libbfd.so,. On my system it is in “/usr/lib/binutils/x86_64-pc-linux-gnu/2.22/” hence:
./configure –prefix=/usr/local/ –with-bfd=/usr/lib/binutils/x86_64-pc-linux-gnu/2.22/
It has been brought to my attention here that my instruction for building this amplifier is not complete. The transistors in the current mirror, and differential amplifier will benefit from having thermal contact, to keep the temperature difference as small as possible, thereby minimising the DC output offset. I have taken the best picture I could, of this coupling for one channel, in my amplifier.
Input circuitry for one channel
I have found this tool indespensible, when finding unforseen errors in complex makefiles.
Just noticed when writing this, that that all the subjects were, sort of, biblical references. I hate to admit it, but I have been temporarily diverted from my power supply project.
I have long been working on compiling an embedded Linux OS, myself, and have been working on a tool for this, using python, a language new to me. The distribution is called EdenLinux, and the tool is called distbuild, it is sort of a Makefile template system. Check out the whole thing here.
It is apple season, and I have been baking different kinds of apple pies. It became quite an obsession, to try the different possibilities, and combine what I liked. I swore that the one I made last weekend would be the last, but then I was given a bag of apples for free, and the one currently in the oven, is destined to be the last 
.
Recent Comments