Archive for the "software" Category

Windows 8: How to Fix Windows Update and/or Windows Defender Check for Updates Failure

I had a very irritating problem with my Acer Aspire V5 notebook computer running Microsoft Windows 8.1 for the past several months. The computer was not able to update itself. When I launched Windows Update, it would just hang forever checking for new updates, so I couldn’t even figure out what updates were needed, let [...]

gCode Visualization

I was working on a project today, which had some serious overhangs. I added support material manually, but needed to make sure that slic3r was traversing a usable path through my supports. Usually, I use Repetier Host‘s excellent built-in gCode visualizer, but it only displays a layer at a time, and I needed to see [...]

Slic3r Support Material Frustration

It’s been a few years since I’ve played with Slic3r, so I was eager to play with the current stable version, v1.0.1. One problem I had when playing with earlier versions of Slic3r was that the support material generation was not yet usable. A part I was designing had a big circular overhang in the [...]

Arduino 1.0.5-r2 for AT90USB1286 and Printrboard

It’s been a few years since I hacked together the copy of Arduino-0022 that’s been floating around the web, which lets you compile and automatically upload Arduino code to an AT90USB1286. This made it a lot easier to develop Arduino code for the AT90USB1286, and in particular to easily modify the Marlin firmware for the [...]

Interfacing a TFT_320QVT LCD/Touchscreen/SD to a Teensy 3.0

I’m working on a project which needs a touchscreen LCD. After searching eBay for a while, I noticed that many vendors were selling basically the same 3.2″ 320×240 TFT with resistive touchscreen and SD card reader. Though there were slight variations in the silkscreens, they all had the same model number – TFT_320QVT. I bought [...]

Arduino suddenly freezing up? Here’s how to fix it.

Every once in a while, my Arduino IDE suddenly takes forever to launch, sticking at the splash screen for a long time. Even after it launches, it’s still basically unusable, because the pull-down menus also freeze up, and take an eternity to respond. It happens to me every time I download a new Arduino IDE, [...]

ITEAD Studio IBOX – Part 3: Installing Java and Processing

ITEAD Studio asked me how to install Processing 2.1.1 on Debian 7.0 running on the IBOX, because they want to use the IBOX as a Lampduino controller. This article describes the installation procedure. All of the commands must be typed into a shell Terminal. 1. Install openjdk and librxtx # apt-get update # apt-get install openjdk-7-jdk [...]

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 [...]

Logging Rainforest RAVEn/EMU-2 Data to ThingSpeak (node.js on Raspberry Pi)

Last year, I bought a Rainforest EMU-2 energy monitor.  It wirelessly talks via zigbee to the smart energy meter that SCE installed at my house a couple of years ago. Unfortunately, its logging capabilities are rather primitive. All it does is give you a crude bar graph of the current and previous day’s usage. SCE [...]

Logging Nest Thermostat Data: Update 1

I have updated my Nest thermostat data logger. The changes are as follows: added fan status, heater status, and AC status. polling interval increased from 15 min to 1 min. data are pushed to ThingSpeak only if at least one field changes. The new node.js code: The corresponding ThingSpeak Channel also needs to have 3 [...]