Martin's corner on the web

Current ranger device

Current ranger device

Now that I own a 'current ranger' device, I am measuring the power consumption of old projects of mine. Pictured below a Atmega328+RFM69 based smoke alarm detector, standby current is 6.5uA so practically no battery impact..

Kenwood breadmaker hub & drive coupling assembly

Kenwood breadmaker hub & drive coupling assembly

Kenwood breadmaker hub & drive coupling assembly replacement instructions literally say take apart the breadmaker to pieces in order to replace the broken drive. Estimated repair time: 1 hr 30 min. Me: drill the bottom out, swap the part and be done in less than 15 min The replacement instructions: https://www.espares.co.uk/advice/careandmaintenance/replacing-a-breadmaker-hub-and-drive-coupling-assembly-twist-and-lock

Geiger counter projects indoors outdoors

Geiger counter projects indoors outdoors

What is the proper shielding enclosure and measurement location (indoors/outdoors) for Geiger counter projects? Taking mine outside gives Chernobyl level readings , indoors is 0.15uSv/h (15-25 cpm) .. so obviously direct sunlight affects the GM tube heavily, and it must be shielded. Good information here: https://www.gqelectronicsllc.com/forum/topic.asp?TOPIC_ID=4540