Archive for month: May, 2015

Some reliability problems with my DS3231…

May 31, 2015 | Amateur Radio, Arduino, Teensy | By: Mark VandeWettering

I was working on some additional software to power my nascent WSPR project. I’ve been thinking that rather than using an Arduino, it would be better to use the Teensy, so I’ve been experimenting a lot with the Teensy LC. My idea was to wire up my Ultimate GPS and an I2C based DS3231, and […]

Farewell…

May 28, 2015 | My Diary | By: Mark VandeWettering

You’ve probably heard the expression that somebody is a “man of few words”. I’m not that guy. I’m a man of many words. I love to talk. I love to write. And yet, it is an odd paradox that when you actually feel like you have something to say, the words fly from you, leaving […]

A 4 digit, 7 segment display board based upon the TM1637 chipset…

May 28, 2015 | Arduino, My Projects | By: Mark VandeWettering

Yesterday, I got a small 4 digit, 7 segment LED display board in the mail from dx.com. Cost was around $3 shipped, and the module uses a 4 pin interface (power, ground, clock and data). Originally, I thought it was I2C, but like other modules I have received based upon chipsets made by Titan Micro […]

Progress Report: Big Box O’ RF

May 27, 2015 | Amateur Radio, Arduino, My Projects, WSPR | By: Mark VandeWettering

Previously, I wrote about a project I called the Big Box O’ RF. I’ve shifted goals a bit, and done some experimentation, and have changed some of my goals and approach. First of all, I’ve changed the goal a bit. Instead of being a piece of test equipment, I’m actually more interested in using it […]

Teensy LC hooked to an Adafruit Ultimate GPS…

May 26, 2015 | Amateur Radio, Arduino, My Projects, Teensy, WSPR | By: Mark VandeWettering

One of the things that I really like about the Teensy LC (besides its low price) is that it has three hardware serial ports. Hardware serial ports are just nicer than the SoftwareSerial ports that you see on the ordinary Arduino platform. While the latest support for SoftwareSerial ports on digital pins work reasonably well […]

Phantom Bad Boys…

May 26, 2015 | Quadcopter | By: Mark VandeWettering

I mentioned that during yesterday’s aborted attempt to fly quadcopters from a regional park resulted in a visit from the “Can’t Possibly Have Fun Police”, informing us that short sighted regulations against flying had been enacted in Eastbay Regional Parks. The entire incident was recorded remotely from Joachim’s Phantom 2. With soundtrack! (This is what […]

First (and second) flight with the DJI Phantom 2…

May 25, 2015 | Quadcopter | By: Mark VandeWettering

Carmen bought a DJI Phantom 2 quadcopter for my birthday, which I’ve been a little too chicken to put into the air so far. But John and Joachim were interested in flying theirs today, so I decided to give it a whirl. Initially, we headed out to Miller/Knox park, out near the old location of […]

Testing the DS3231 module… I’m impressed!

May 23, 2015 | Amateur Radio, Arduino, My Projects, QRSS, WSPR | By: Mark VandeWettering

I hooked up my new DS3231 clock module to an Arduino that was being fed with the one pulse per second input from a locked GPS, and counted the number of pulses from each. In 3170 seconds, the clock module generated 103874565 pulses, for an average pulse per second of 32768.0015773 pulses per second. That’s […]

New (more accurate) clock module…

May 22, 2015 | Arduino, Development Boards, My Projects | By: Mark VandeWettering

As I mentioned in a previous post, I was not enormously satisfied with the accuracy of the DS1307 clock module that I got from China. It was hard to argue with the less than three dollar price tag, but I was hoping that the accuracy might achieve 20ppm (less than two seconds of drift per […]

Accuracy of the DS1307

May 21, 2015 | Arduino, My Projects | By: Mark VandeWettering

My tinkering with using the Adafruit GPS as a time base has yielded some results. I’m still getting a few spurious interrupts when I feed my buffered PPS signal into the interrupt pin on the Arduino, but they are relatively few and far between (and quite regular in appearance). A few short notes, followed by […]

Capsule Review: The Adafruit Ultimate GPS Module

May 19, 2015 | Amateur Science, My Projects | By: Mark VandeWettering

I picked up an Adafruit GPS module while at the Maker Faire. It’s a cool little module. I had a couple of old GPS modules: a Parallax PMB 648 and a Garmin 89, but this one is pretty nifty: It is small. It is breadboard friendly. It has a one pulse per second (1PPS) output […]

Rheoscopic Fluid (mica in suspension)

May 19, 2015 | Amateur Science, My Projects | By: Mark VandeWettering

I mentioned in my Maker Faire wrap up post that I had spoken with Ben Krasnow, the science guru behind the Applied Science Youtube channel. If you haven’t watched his videos, by all means, go over there and give it a whirl. Between playing with chemicals, low temperatures, rockets, X rays, and electron microscope, it’s […]

Weekend Update: Maker Faire, new gadgets, and I ground myself…

May 17, 2015 | Arduino, electronics, ESP8266, WSPR | By: Mark VandeWettering

Greetings readers. I’m hopefully wishing there is still more than one. This weekend was the Bay Area Maker Faire 2015, the 10th incarnation of an event which has become increasingly (even frighteningly) popular. I’m tempted to channel Yogi Berra, who said “Nobody goes there. It’s way too crowded.” Anyway, I got out of my house […]

Time from the ESP8266…

May 14, 2015 | Amateur Radio, Arduino, ESP8266, WSPR | By: Mark VandeWettering

Yesterday, I mentioned the idea of using the cheap ESP8266 as a clock source for a WSPR beacon transmitter. My initial idea was to basically write code for the Arduino that connected to a remote NTP server, formulate UDP packages… sounds like a pain. But then I found that there was alternative software I could […]

It’s about time… (with some WSPR updates)

May 14, 2015 | Amateur Radio, WSPR | By: Mark VandeWettering

Yesterday I finally found a copy of the code that I wrote years ago to figure out the tone sequence for messages used by the Weak Signal Propation Reporter system. To avoid losing it again, I decided to put both the C versions and the Python versions on my github page so that even if […]