EDIT: I used the wrong solar cell in this experiment, using a single solar cell 0.5V the supercap charges fully for less than 45 min I wired my LTC3108 breakout board this morning to a 120x80mm solar cell, shamelessly scavenged…
I have mentioned before my interest in energy harvesting, and have decided to try Robert’s LTC3108 breakout board. The Funky sensor is all about low power, so it is an ideal candidate for battery-less low power node. I got the…
I got myself a 1.8″ TFT LCD display from ebay, attracted by the low price. The display also has a SD card slot. It comes without any documentation and you are presented the joys of figuring out how to drive it…
I thought it would be interesting to analyze our hot water usage, at this stage this is just for fun, but maybe in the future to make more it energy efficient. During the winter, I use my heat pump to…
The 2boots bootloader is a lovely bootloader, developed by Thomas Seiler that is Just 2kb of flash, fits into normal 2kb bootblock of most atmega chips Serial (stk500v1) bootloader, compatible with avrdude and Arduino IDE Additional MMC bootloader, can read…
I noticed this Instructable the other day and had to try it since I had an old USB web cam laying around. I found that the instructions contained some inaccuracies, here are my steps: sudo apt-get install motion sudo nano /etc/motion/motion.conf Locate…
Now that I log my location and distance from home, I can visualize this data; Below is a 5-day log on my daily trips – I live around 20km away from the city: I am still not using this data in home…
Glyn from OpenEnergyMonitor surprised me pleasantly the other day by sending me an emonGLCD unit to evaluate – thanks! Building it was easy, and an hour later I had it working. Quite nice piece of hardware, a must-have for home monitoring…
The uIoT gateway shield has FTDI plug that I used mostly for serial debugging, while for programming I used a clone of the USBTiny programmer. I wanted to adapt optiboot for the uIoT gateway, as that will make it easier for…
I haven’t had the time to follow up on the Atmega32u4 based new Funky, I now have finalized the board layout (I think). This has been quite a learning experience for me, I only started work on a remote node with this…
As I ordered the wrong magjack for the uIoT gateway, I couldn’t test the Ethernet connectivity yesterday. I only could test that the Atmega328 talks to the ENC28J60 and ran a LED blink sketch. Today I decided to test out the shield…
My uIoT gateway project has been put on hold lately, I have the PCBs ready for more than a month now, but never had the time to make one and test it. I finally put one together today, but apparently…
pChart is a neat PHP charting tool, I have been using prior to switching to emoncms. Emoncms has multigraphs available, that are much more interactive, but they are slow too. I also have had some issues with certain feeds that…
With quite a few RFM2Pi boards out there, some issues started to pop up. When using the board to send time packets to emonGLCD, the board would interpret random serial gibberish as valid command and would switch its nodeID to…
I got myself Santa brought me a new laptop couple days ago, an Asus K56CM. I am no brand slave, I just pick one that fits the budget I set aside and what covers my basic requirements. I prefer not to spend…