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Measuring Time Takes Time
Here's a little bit of data on the Denuo GPS in a REF-0 during the warm-up period.Classic "lots of zeros" picture of the REF-0 10MHz output.Does this shot have much meaning? Not really.I've been...
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PCB Progress on the Tria GPS
Lots of progress today on the Tria GPS board. I got the PCBs back and assembled the first one. So far it tests out good.SMT is so clean. My least favorite part of assembly issoldering on the...
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Tria GPS Success in the REF-0
I made some good progress yesterday on the Tria GPS firmware. I have been finding and fixing little bugs over the past few days, and finally got to the point where I could test my Oncore message...
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Simulating GPS Week Rollover with the Tria GPS
GPS week rollover is an interesting "bug" in the way GPS keeps track of the date. Rollovers are not frequent, but when they do occur, it is possible for equipment reliant on a GPS lock to malfunction....
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Distractions
If I don't stop getting distracted, I'll never finish the Tria GPS firmware. Hmm...- Dan W.
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Denuo GPS Hits Rev B + Dongles...
This is a quick update on the REF-0 projects I have going.REF-0s running my Denuo GPS board. All lights green.The Denuo GPS has hit Revision B. There were very minor changes to the original board,...
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Helping Your Feathers Flock Together
This post is about the Adafruit Feather line of microcontroller development boards. It will serve as a guide to cross-Feather compatibility when designing both hardware add-on circuits and software to...
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Exploring the I/O Performance of the Arduino 101
In this post I will explore the hardware input/output (I/O) performance of the recently-released Arduino 101.The new, yet somehow familiar, Arduino 101.IntroductionThough many of my personal projects...
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MultiNav FeatherWing for Adafruit Feather
This post will serve as documentation for the MultiNav FeatherWing for Adafruit Feather.GPS + 9DOF for your Adafruit Feather!IntroductionThe MultiNav FeatherWing is an add-on board for Adafruit...
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Arduino 32-bit Speed Test Shootout!
I benchmarked some Arduino 32-bit boards, including an Arduino 101, Arduino Due, Arduino Zero clone, and a chipKIT Uno32. I threw an Arduino Uno into the mix for comparison. Here are the...
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Wi-Fi and OLED Upgrade for MightyOhm Geiger Counter
In this post I will show you how to add Wi-Fi connectivity and an OLED screen to the MightyOhm Geiger Counter kit. Lots of fun!MightyOhm Geiger Counter kit with Wi-Fi and OLED!IntroductionI assembled...
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Glass Envelope Quartz Crystals
Here are pictures of some interesting glass envelope crystals I received today in the mail. I'm not sure if I should call them "vintage"; they aren't that old based on the date stamps. Very interesting...
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OCXO Upgrade for Racal-Dana 199x Counters
In this post I will document an OCXO upgrade board I made for the Racal-Dana 199x series of frequency counters.My Racal-Dana 1992 with the OCXO upgrade installed.IntroductionI have always been...
View ArticleBlog Hits 10k Views + "Quick PCBs"
Last week this blog hit 10,000 page views! That's very surprising to me, as I haven't posted a huge amount of content to date. When I started this, I only got hits when I posted an article on a mailing...
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Quick PCB: Pi Attenuator
This tiny PCB can be used to make a useful Pi attenuator for your bench.Tiny RF Pi attenuators using surface mount resistors.Attenuators are useful when you need to reduce a signal's strength by a...
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Quick PCB: Crystal Ladder Filter
Here's a little board for making a four pole crystal ladder filter.Four Pole Crystal Ladder Filter with SMA connectorsThis type of filter has a very high Q and narrow bandwidth, allowing you to select...
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HP 5221B Electronic Counter
It is a snow day here, so let's take a break from projects and look at an old Hewlett-Packard frequency counter. I purchased this 5221B electronic counter last year in San Diego from a military surplus...
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LoRa FeatherWing Development Breakout
In this post I will document a LoRa FeatherWing Development Breakout board that I designed for the Adafruit Feather line of microcontroller boards.LoRa FeatherWing Development Breakout for Adafruit...
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10MHz OCXO Teardown (CTS 1960017)
I recently purchased a case of CTS 1960017 10MHz OCXOs on eBay. They are little 5V units with a sine wave output, and purchased in this quantity, cost $5 a piece. I decided to sacrifice one and open it...
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ATtiny10 Mini Breakout Board
Here is a very tiny breakout board for the Atmel ATtiny10. It's so small, you'll lose it. Literally. I lost one in the carpet and I'm hoping to find it before the vacuum does.ATtiny10 Mini Breakout...
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