Creating a temperature monitoring dashboard in Grafana to display temps from sensors all around the house. Running on Raspberry Pis and using the venerable DS18B20 one-wire sensor.
Category Archives: tech
Flashing LEDs with a 555 timer – and not a lot else
Just dug this out of storage – some electronics I made in the late 80s/early 90s. Most of it is old/scrap components that were lying around on my desk – only the (socketed) 555 and MC14526 counter/divider actually do anything; flashing the LEDs along the edge. I can remember making it at work during quietContinue reading “Flashing LEDs with a 555 timer – and not a lot else”
Bicycle Dynamo…
via TweetDeck A modern dynamo – who knew they still existed and were so cool. From the 1980’s style, tyre rubbing demons, to this 🙂
Retrophone #Ericsson t39 – dug out of the drawer, still working!
Just dug the old T39 out of the drawer – still works, but have to charge the battery off the phone, and battery won’t take a full charge, but apart from that I love the form factor… Perfect just for making calls 🙂
Adventures in Solar
 The smaller “trickle charger” looked like it would manage just over a watt  I need to test these on an overcast day to get more or a realistic idea of their capabilities…  Ideal for camping – assuming there’s some sunshine!     See the full gallery on Posterous  Â
Room 7609 