KO7M - Ham Radio Blog

The ramblings of one home-brew electronics, firmware engineer and pilot.

Tuesday, May 19, 2015

Si5351 Signal Generator - 3D print of case

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Now that the software is in pretty good shape (with a couple lingering issues) I turned my attention to building a case for this project.  H...
1 comment:
Sunday, May 17, 2015

Uh oh...

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I ran across an interesting little anomaly today.  Consider the following Arduino code which prints the result of dividing an unsigned long ...
2 comments:

UPDATED: Si5351 Signal Generator

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I have been updating the UI on my Si5351 signal generator a little bit today.  I think it is about where I want it to be.  I display all thr...
1 comment:
Saturday, May 16, 2015

Progress grinds to a halt...

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I have encountered a rather significant impediment to progress this afternoon in the form of one attention starved (apparently) feline by th...

Si5351 Signal Generator

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I have been expanding on my initial experiments with the Si5351 today while at the same time getting some experience with my little 1.8...
Monday, May 11, 2015

i2c Scanner

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I wanted to share a useful script that I have written to determine the available addresses on Arduino's i2c (pronounced "eye-square...

Si5351 clock generator

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I am having a play around with a the much discussed Adafruit Si5351 clock generator board this morning while waiting for a phone interview. ...
1 comment:
Tuesday, April 21, 2015

The Kurier System

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In the same vein as my previous postings  on the Enigma cipher, I have been doing some reading about some of the challenges that faced the B...
Monday, April 13, 2015

CNC control

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I have had these bits and pieces laying around for quite a while now and decided to drag them out and have a play around with NEMA17 stepper...
Saturday, April 11, 2015

Kriegsmarine M4 U-Boat message decryption

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To test my M3/M4 Enigma machine code , I have given it the challenge of decoding an actual intercepted M4 message. The message was interce...
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Jeff ko7m
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