I have been experimenting with my Raspberry Pi TFT display these few days with the intention to use it as a misc status display, heavily influenced by Mark‘s work. I collect most of my house’s telemetrics to an emoncms installation running on…
New RFM2Pi board in the works
Glyn Hudson and I have been working on a new RFM2Pi board revision, nothing revolutionary, just a small upgrade. The most important features of the board are: Atmega328 based, has more memory and hardware serial support Runs on the internal…
Funky v2 gets its own USB VID/PID pair
As with every USB device out there, the Funky v2 needs an unique Vendor ID and Product ID combination so that it is recognized and USB compliant. Unfortunately, purchasing a Vendor ID costs fortune and is out of the question…
433Mhz OOK with Funky v2 to remotely control power sockets
Here is a 15 minute project: control 433Mhz RF sockets with the Funky v2: I have a 433Mhz OOK transmitter/receiver, I don’t even recall where I got them. These are widely available on ebay for less than $5 delivered. I…
Receiving IR with Funky v2
I ran a quick test today to see how Ken Shirriff’s IR library behaves on the Funky v2. One of the things I noticed in my current design is that I don’t have a pin with timer output routed to…
Power saving techniques on the Atmega32u4
Now that I have a Funky 2 prototype, I can toy with what I am most interested in: reducing power usage so that the Funky can operate on battery as long as possible. I have achieved amazing results with an…
Funky v2 (well almost)
I’ve finally put together an Atmega32u4-based USB Funky late yesterday. Soldering the QFN44 chip and 0402 sized elements wasn’t as hard as I thought, I did it myself: Of course, there had to be issues, namely I have swapped the MOSI/MISO…
1.8″ TFT LCD display on Raspberry Pi
[edit] This project is now available for sale in the store I figured my cheap 1.8″ TFT display is useless on an Arduino as it pretty much eats the available memory (20K for simple sketches), so I decided to try it…
Using the LTC3108 breakout board with a TEG
As I mentioned already, I burned my old Peltier element before receiving the LTC3108 breakout PCB, so I couldn’t test that setup. So I went and hooked a solar cell, but the configuration I have on the PCB is not optimal…
Using the LTC3108 breakout board with a solar cell
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…
Energy harvesting
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…
Toying with a 1.8″ TFT LCD display
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…