Apart from the pathetic etching job on the PCB I described yesterday, I found out this morning that I also managed to etch the kitchen sink and made wife unhappy. It have been warned not to pour ferric tri-chloride in…
Home made PCB for the remote temperature sensor
As I mentioned in my other post, I wanted to re-do the temperature sensor, this time on my own PCB. Driven by the hunger for instant gratification, I have overcome my fear of home-made PCBs using toner transfer and ferric…
The ATtiny84 remote sensor gets and upgrade from single analog to multiple digital temperature sensors
I intended to use the ATtiny84 remote RFM12B sensor to measure my solar hot water tank, but once the temperature reached 57.05, it wouldn’t measure any higher. I assume this is due to the 1.1V reference limit used to measure,…
ATtiny84 remote temperature sensor with RFM12B
I have been drooling over the Amtel’s ATtiny84 mcu ever since JCW released the JeeNode Micro few months ago. It is an amazing piece of art, you can basically have a single-chip micro controller that can do most of the…
Controlling 433Mhz RF power sockets with a RFM12B module
One of the goodies of home automation is that you can actually turn appliances on and off based on some pre-defined conditions or via the Internet. Typically that task will require setting up a relay or multiple relays and hooking…
Sensing Shield #1 in action
I have installed the first sensing shield on an Arduino Uno near my house’s breakers box. I finally got a 9V AC/AC transformer so I wanted to monitor my voltage, power factor and effective power usage in my house. I…
Software only solution for feeding weather data to emoncms
I have installed emoncms to try it as alternative to my own data visualization software. It is quite nice piece of software and is open source. I then wanted to gather weather data but lack the hardware to measure humidity,…
RFM12B and Arduino Ethernet with WizNet5100 chip
I have successfully managed to get my Arduino Ethernet board based on WizNet5100 chip to work with the Sensing Shield‘s RFM12B. The Arduino Ethenet (don’t mix it with an Arduino Ethernet shield, this one is a complete Arduino+Ethertnet on one board)…
Sensing shield PCB ready
The sensing shield PCB is ready, I placed some of the components already and am testing it. Looks good so far 🙂