Tuesday 11 August 2015 15:34
For the past few months we have been working on a set of new USB smart chargers which run from our off grid 12V system to be used for charging tablets, smartphones and other devices which charge from a USB port.
The aim of the new smart...
Thursday 06 June 2013 22:43
It has now been just over 12 months since we installed our Raspberry Pi solar data logger system on the house and it has been uploading temperature readings, battery voltage and current readings every minute, 24 hours a day, 7 days a week.
Thursday 03 May 2012 20:29
Following on from my post Arduino based Solar PV and Hot water monitoring and logging we have designed and created the new PCB (printed circuit boards) for the MCP9801 temperature sensors and also a PCB to hold a mains relay for switching the...
Sunday 29 April 2012 16:48
We are upgrading our DIY PV off grid system with extra panels and also a solar hot water system using a kit from http://navitron.org.uk/ with a 20 tube 58mm double wall evacuated tube solar collector on the roof and a new water cylinder and...
Saturday 27 June 2009 21:48
After looking for more items around the house which could be charged from the new solar system, we decided to try converting the Logitech Harmony 885 remote control chargers to run from 12 volts.
The Logitech charger runs at 8 volts and uses...