embeddednewbie.blogspot.com
Embedded newbie: February 2011
http://embeddednewbie.blogspot.com/2011_02_01_archive.html
Monday, February 7, 2011. Review of Arduino DAC solutions. I was in a need of an analog output output for my Arduino, and I found quite many different digital-to-analog converter (DAC) solutions by googling around. So finally I decided to gather them on one page as a reminder for myself and a guide for others. So here it comes! MAKE: Online's DAC shield. Make: Online - Proto-DAC shield for Arduino. A Direct digital synthesizer build using a R-2R ladder DAC. R-2R ladder DAC with output buffer. This design...
embeddednewbie.blogspot.com
Embedded newbie: Overview of the LPCXpresso development platform
http://embeddednewbie.blogspot.com/2011/03/overview-of-lpcxpresso-development.html
Monday, March 14, 2011. Overview of the LPCXpresso development platform. I got hold of the LPCXpresso development platform. This is a nice, thin 32-bit development platform with a built-in USB programmer for only 20€. The LPCXpresso. On the right is the target board, on the left is the LPC-Link USB JTAG debugger. The separated LPC-Link debugger. Picture: NXP. This article focuses on the LPC1114 version. The LPC-Link portion of the board uses a LPC3154 for the debugging. Looking at the datasheet. LPCXpres...
embeddednewbie.blogspot.com
Embedded newbie: Fixing missing modules error in Raspbian
http://embeddednewbie.blogspot.com/2014/03/fixing-midding-modules-error-in-raspbian.html
Tuesday, March 18, 2014. Fixing missing modules error in Raspbian. If you have used hifi's raspbian-ua-netinst, the unattended Raspbian installer. You might run into problems with modules:. ERROR: could not open directory /lib/modules/3.10-3-rpi: No such file or directory. FATAL: could not search modules: No such file or directory. I fixed this problem with:. Note that this will also upgdare your firmware and the linux kernel! Subscribe to: Post Comments (Atom). Review of Arduino DAC solutions.
embeddednewbie.blogspot.com
Embedded newbie: April 2011
http://embeddednewbie.blogspot.com/2011_04_01_archive.html
Friday, April 29, 2011. Better output buffer for an R-2R ladder DAC. One day I needed a simple R-2R ladder DAC, and needed an output buffer for it, so I started to design one. Initially I was planning to use the LM358, but then I remembered seeing an op amp from TI that would be more suited for the job. First off, I'd like to clear up two things for those that might wonder. Why I need an output buffer? For example the R-2R ladder digital-to-analog converter. Why linearity is so important? The LM358 has b...
embeddednewbie.blogspot.com
Embedded newbie: March 2014
http://embeddednewbie.blogspot.com/2014_03_01_archive.html
Wednesday, March 19, 2014. Backing up the Raspberry Pi SD card. Since there's a lot of talk about corrupted SD cards, I decided it's best if I take a backup of mine every now and then, to ensure I don't lose all my work due to some stupid corruption. There's many different reasons for the corruption problems: faulty memory cards (SD cards have a limited number of read/write cycles, especially the older ones), counterfeit SD cards. Never buy your SD card off eBay! I use the free program Win32 Disk Imager.
embeddednewbie.blogspot.com
Embedded newbie: Getting sound to work on the Raspberry Pi
http://embeddednewbie.blogspot.com/2014/03/getting-sound-to-work-on-raspberry-pi.html
Tuesday, March 18, 2014. Getting sound to work on the Raspberry Pi. I wanted to try out audio on the Raspberry Pi, using the Raspbian OS. Here's how I got it to work. The installer I used for Raspbian was the minimal network installer by hifi. This will use up only about 150MB of space and will not install a desktop, so you'll save a lot of resources with this approach. After installing Raspbian, this is what I needed to do in order to get sound output. Update the package list for APT. Linux pi 3.10&...
zerofidelity.blogspot.com
zero fidelity CNC: Gutting printers for steppers
http://zerofidelity.blogspot.com/2010/12/gutting-printers-for-steppers.html
A blog about building a DIY CNC laser cutter / engraver from mostly recycled parts. Tuesday, December 21, 2010. Gutting printers for steppers. Immediately after I started drooling at the DIY CNC videos on the 'net, I found two printers in the garbage. What luck! There's the free stepper motors I was hoping for! Or so I thought. The models were HP Deskjet 5150 and Deskjet 656C. HP Deskjet 656C straight outta garbage. To give feedback on the printhead's position. HP's optical guide for the printhead. That ...
zerofidelity.blogspot.com
zero fidelity CNC: March 2011
http://zerofidelity.blogspot.com/2011_03_01_archive.html
A blog about building a DIY CNC laser cutter / engraver from mostly recycled parts. Saturday, March 12, 2011. Removing the LD from the Aixiz module. OK, I finally got on with this project. Next step for me was to remove the existing laser diode (LD) from the 650nm Aixiz module. Here's the 650nm 5mW Aixiz module before the operation. The original plastic lens and spring has been removed. The upper lens in the picture is the glass lens, which I'll use later for the burning laser. To make the burning laser.
zerofidelity.blogspot.com
zero fidelity CNC: Gutting a DVD burner for it's laser
http://zerofidelity.blogspot.com/2010/12/gutting-dvd-player-for-laser-diode.html
A blog about building a DIY CNC laser cutter / engraver from mostly recycled parts. Monday, December 20, 2010. Gutting a DVD burner for it's laser. There are a ton of instructions on the net about ripping laser diodes out of old 16x DVD burners. Well, here's mine. Quite soon after starting this project, I found exactly what I needed: a 16X DVD burner from an old computer in the electric waste. Here's the poor thing before the operation. It's an LG GCC-4480B CD-RW/DVD ROM drive. The red laser I'm looking ...
embeddednewbie.blogspot.com
Embedded newbie: March 2011
http://embeddednewbie.blogspot.com/2011_03_01_archive.html
Monday, March 14, 2011. Overview of the LPCXpresso development platform. I got hold of the LPCXpresso development platform. This is a nice, thin 32-bit development platform with a built-in USB programmer for only 20€. The LPCXpresso. On the right is the target board, on the left is the LPC-Link USB JTAG debugger. The separated LPC-Link debugger. Picture: NXP. This article focuses on the LPC1114 version. The LPC-Link portion of the board uses a LPC3154 for the debugging. Looking at the datasheet. LPCXpres...