Archive for the "electronics" Category

ITEAD Studio IBOX Part 2: Booting up Debian Linux 7.0

My IBOX came shipped with Android TV A20 pre-loaded in the NAND flash. I plugged a Microsoft keyboard and mouse into the USB ports, and used my Panasonic plasma TV as a HDMI display.  The boot screen is a bit confusing, because it implies that the device has WLAN support: You can ignore the big [...]

ITEAD Studio IBOX – Part 1: First Look

ITEAD Studio recently contacted me to let me know that they’re going to display my Lampduino project at the Shenzhen Makerfaire. I thought that was a pretty cool idea, and am honored to hear that. They also asked if I wanted to test out their IBOX mini multifunction single board computer, which is currently in its final [...]

Noritake 24×6 Character VFD Module

I’ve always thought VFDs were pretty cool. They used to be the rage in high end consumer electronics. Back in the mid 70′s, I built a VFD alarm clock. Recently, I got my hands on a modern VFD module to play with. The Noritake-itron SCK-Y100-24063-N14 is a very flexible 24×6 character VFD module in the same [...]

TP-WR703N: Adding Storage Space – EXTROOT

Once you have your TP-WR703N running OpenWrt, you’ll find that it doesn’t have a lot of free space for adding your own files. Here is the output from df from after installing attitude-adjustment: root@OpenWrt:/# df -h Filesystem Size Used Available Use% Mounted on rootfs 1.1M 352.0K 736.0K 32% / /dev/root 2.0M 2.0M 0 100% /rom [...]

Hacking the TP-Link TP-WR703N – Part 2: Bring it back from the dead (How to unbrick it)

This morning, I realized that I actually had a 3.3V UART in my house that I could use to connect to my bricked TP-WR703N‘s serial port .. the Raspberry Pi runs on 3.3v! I dug up the instructions on how to hook it up on the OpenWrt forum. After hooking it up, configuring it, and firing [...]

Hacking the TP-Link TP-WR703N – Part 1: Brick it and then hack its serial port

I’m working on an embedded project that needs to be able to run node.js over WiFi. There aren’t too many cheap boards that can run linux. The $25 Raspberry Pi and the discontinued Pogoplug V2, which can be had for about $15 immediately came to mind. However, each of these boards had their shortcomings.  The [...]

LeafCAN v2 Firmware in Alpha Test

I have been working on v2 of the LeafCAN firmware, which adds a whole slew of new screens, selectable via a rotary encoder.  The rotary encoder is connected to the AD0/1/2 pins on the expansion header of the LeafCAN V2 hardware.  The code is currently in alpha testing, and is available in the development branch [...]

UCTronics 3.2″ TFT LCD Arduino Shield with Touchscreen

Updated 2014-03-14 I’ve been looking for a way to add a touchscreen UI to my projects.  To this end, I purchased a UCTronics 3.2″ TFT LCD Arduino Shield.  Most of the cheap TFT touchscreens that I found need about 38 pins, and therefore, need to interface with an Arduino Mega.  What makes this UCTronics shield unique [...]

EKitsZone UNO Rev.3 First Look

I recently decided to buy an Arduino UNO R3, to test compatibility with my sketches, which I have been testing w/ a Deumilanove.  The UNO R3 contains an ATmega16U2  instead of an FTDI chip to do the serial to USB conversion, as well as 3 extra pins on the digital side of the board: SCL/SDA/AREF.  [...]

Build Ganzfeld-style Photic Goggles (AVS Lightframes)

Building upon my passive Ganzfeld goggles, I decided to build a set of Ganzfeld-style lightframes for photic brain stimulation.  I was inspired by the goggles which come with the very expensive Laxman mind machine: Typical lightframes which come with audio-visual stimulation (AVS) mind machines use point source LEDs, such as this pair which came with my MindPlace [...]