Maker Faire Bay Area 2014

May 11th, 2014 by Jeff

TMaker Faire Bay Area 2014

The 2014 Maker Faire Bay Area will take place in San Mateo, CA this coming weekend, May 17-18th.  I’ll be there! No booth this time. I’ll be wandering around the fairgrounds hoping to actually see the Faire this year.

Rescue your bricked AVR micro with the Rescue Shield, now back in stock!

January 12th, 2014 by Jeff

Rescue Shield kits are (finally!) back in stock.

AVR HV Rescue Shield

The Rescue Shield is a 100% open source, Arduino-based high voltage mode fuse programmer for AVR microcontrollers.

It allows you bring  an otherwise “bricked” or misconfigured AVR back to life by editing the configuration fuses that control the operation of the RESET pin, the internal oscillator, and other features of the microcontroller. The Rescue Shield can talk to chips when ordinary ISP programmers can’t.

Follow this link to learn more and place an order.

Design and Construction of a 24 GHz Low Noise Amplifier

October 26th, 2013 by Jeff

24GHz Low Noise Amplifier


Tony Long and I designed and built a 24 GHz low noise amplifier for our ECE192 undergraduate independent study project at UCSD.

The amplifier was designed with an early version of Agilent ADS, PCBs were fabricated on Rogers 5880 (Duroid), and we hand built several prototypes on K-connector fixtures that Tony designed. Measured results were consistent with our simulations.

Closeup of two stage LNA PCB

Tony and I won an award for this project at the Eureka! undergraduate research conference in June 2000.

I heard recently that this project is being used as an example of a good EE senior design project at other universities, so I dug up an original copy of the paper we submitted and posted a PDF here.

Open Hardware Summit Pics!

September 8th, 2013 by Jeff

Open Hardware Summit 2013

What an awesome event.  Great people, great talks, and gorgeous weather made for an epic weekend in Cambridge.

My photos are up on flickr.

Also, I just finished recording a shiny new episode of The Amp Hour, which should be online as soon as Chris finishes editing.  Look for it later tonight or tomorrow on Tuesday.

Upcoming events: OHS, TAPR DCC, NYMF

September 1st, 2013 by Jeff
OSHW summit goodie bag

photo credit: adafruit

There are three major events of interest to open source hardware and makery folks this month:

I’ll be at OHS and TAPR, but have to skip the NY Maker Faire this year.  I imagine that far fewer folks from OHS will be attending NYMF now that those events are no longer co-located.

Sorry NYMF, but I can’t turn down an excuse to visit my friends in Harvard square.
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