Geppetto Electronics
Sunday, September 20, 2015
FE-5680A Breakout board users guide
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This is the permanent home for the user's guide for the FE-5680A breakout board. The FE-5680A is a Rubidium frequency standard widely ...
Sunday, July 26, 2015
GPS Disciplined Oscillator User Guide
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This is the permanent home for the GPS Disciplined Oscillator User Guide. More information can also be found at the Hackaday.io project page...
Thursday, July 23, 2015
A GPS disciplined oscillator
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I've started a new project over on Hackaday... It's for a GPS disciplined OCXO. What it does is make a 20 MHz LVCMOS square wave tha...
Saturday, July 4, 2015
Accurately measuring low frequencies
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When I discovered the Crazy Clock accuracy problem, one thing I needed to come to grips with in a hurry was exactly how to characterize the ...
Wednesday, June 24, 2015
Crazy Clock accuracy problems
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I've discovered a design flaw in the Crazy Clock. The result of this flaw is that the clock fairly consistently gains time at a rate of ...
Friday, June 19, 2015
Sidereal clock movements
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The Crazy Clock has been out there for a while, and one of the firmware options for it for almost as long has been the Sidereal clock. In l...
Wednesday, June 10, 2015
AVRDUDE with linuxgpio and least privilege: don't sudo
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The principle of "least privilege" is a valuable practice. Far too many people just put "sudo" in front of everything w...
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