Low power serial keypad

I bought one of these keypads off ebay few days ago, and decided to try it out. These work pretty straight-forward, you have 8 pins – 4 for rows and 4 for columns. When you press a button, it creates contact between the respective row and column. Still, you need 8 pins to drive it,…

RFM2Pi firmware updates

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 some random number. This behavior is not observed when using the bard in ‘receive-only’ mode. To prevent…

Funky LED candle

There is probably a million LED candle projects already, so I had to give it a try too :). I used bare Funky PCB and an ATTiny84 – no need for anything else indeed.The Attiny is set to run on 1Mhz with BOD disabled, so it will keep going down to 1.8V. I soldered a…

USB on the Funky

I recently came across a neat little (literally) project called MicroFTX. It is incredibly small USB to serial adapter board based on FT230XQ (datasheet) from FTDI’s new X-Chip series. I thought it would be neat to throw in some native USB support on the Funky, so I did a small experiment. This is all work in progress…

Clocking the Funky sensor from RFM12B’s crystal

I have already expressed my thoughts on this, and of course could not resist materializing them. The main reason is that I would like to experiment with IR and RF stuff that requires precise timings. The internal oscillator’s frequency depends notably on temperature and voltage change and although it can be calibrated, I still prefer crystal. The…

RFM12B to Raspberry Pi board

I have decided to discontinue the TinySensor project and focus on Funky Sensor as they overlap a lot as functionality. These of you following my posts, know that I have a working prototype for a dedicated board  for RFM12 to Pi connectivity, I later modified the TinySensor to include the 2×5 pin header so it could plug…

3D modelling of PCB designs

@Gadjet from http://www.gadjet.co.uk/ showed off some nice 3D renderings of his projects the other day in JeeLab’s forums and had me all excited about it. He used EagleUp, some nice peace of software that turns your Eagle PCB layouts into Google Sketchup models. Here’s how the latest SuperFunky looks (note the added micro USB port) Page views:…

Super ‘Funky’

Tobias’s original ‘Funky’ had voltage regulator, that I removed in my version in favor of a voltage step-up circuit. How about having both on the Funky and you will decide which one to use depending on the concrete application? Well, I managed to squeeze in a voltage regulator, while keeping the step-up circuit. Another change that I…

Interfacing ‘Funky’ to Raspberry Pi

I am finding myself using Funkys for all of my recent projects, so I am thinking of discontinuing the TinySensor. I think the better approach would be to have various ‘shields’ for the Funky rather having hardware on board that anyone will rarely use, for example the SD card option, the voltage divider or the…