All posts by Jeff

Electrical engineer, tinkerer, maker.

The Mike and Key Amateur Radio Club Swap Meet is next weekend in Puyallup, WA

The 36th annual Mike and Key Amateur Radio Club Electronics Show and Fleamarket will be held next Saturday, March 11th at the Washington State Fairgrounds in Puyallup, WA.

This is one of the best amateur radio events in Washington state and one that I look forward to every year. A couple years ago I came home with a working Hameg HM-507 analog+digital oscilloscope (pictured above) for a hundred bucks!

I have a table at the swap meet this year, and I’ll be selling Geiger counter kits, misc. electronics, and amateur radio gear. Look for the MightyOhm banner.

I hope to meet some local folks there!

Have a cool electronics workbench? Show it off on flickr!

Electronics workbench
“Electronics workbench” by John Croudy on flickr

The Electronics Workbench Flickr Pool contains over 200 photos of electronics workbenches and workshops. Whether you’re looking for inspiration for your next bench or just want to see where other electronics enthusiasts work on their projects, check out the group photo pool!

If you have a cool electronics workbench or workshop, we’d love to see it! Post a photo to the pool!

LVA Geiger Counter

Image of Geiger Counter v2.0

Veselin Georgiev created this custom Geiger counter based on the MightyOhm Geiger Counter kit. Veselin’s version, called the LVA Geiger Counter, includes several changes:

  • A 7-segment display with brightness control shows the measured radiation level in uSv/hr or total counts since startup.
  • ATmega88 instead of ATtiny2313 to allow more space for firmware extensions.
  • Battery level monitoring with alarm.
  • Phono jack pulse output for connection to monitoring software.

Kits are available from robotev (shipping to Bulgaria and Balkan-area only).

Velimir’s WiFi Internet Radio Project

Velimir Cvetkovic submitted a video of his nicely executed WiFi radio project to the forums. His project is based on my wifi radio project from 2008.  At the heart of the radio is an Asus WL-520gU wireless router. Velimir wrote his own LCD display and channel selector firmware in BASCOM.

His wooden case design is very similar to the one Tony and I built for the 2009 Bay Area Maker Faire.

Nice work, Velimir!