Thursday, May 12, 2016

$25 Satellite Tracker

After building my QFH antenna, I became more interested in satellite communications. The QFH antenna works great for circularly polarized signals like weather satellites, but something like a yagi or log-periodic antenna is better for most sats, because it can be pointed directly at the sat.

Wednesday, March 25, 2015

QFH Antenna for Receiving Satellite Images Using RTL-SDR

There is an incredibly popular low-cost software defined radio, known as the RTL-SDR. I've had one of these for months, and haven't really done anything cool with it. Recently I've seen a lot of people on the rtl-sdr reddit building quadrifilar helix (QFH) antennas to receive images from satellites using automatic picture transmission (APT). I decided to try this over spring break.

Friday, October 24, 2014

RGB Internet Pumpkin

Just in time for Halloween, I modified my previous Raspberry Pi Internet LED Control project to control an RGB LED, and stuck it inside a fake pumpkin. Now I have an internet controlled RGB pumpkin!

Sunday, March 16, 2014

Digital Picture Frame with Animated Gifs

The problem with old computers is trying to find a use for them after you have upgraded. I found myself owning four different laptops. Along with my tablet, phone, and desktop, I didn't have use for so many laptops.

Thursday, February 13, 2014

Astro Star Projector Kit Build

Recently I heard about the Cloud b Twilight Constellation Night Light, which is a stuffed turtle that projects stars from it's shell. I considered ordering one, but first I searched for a cheaper star projector.

The cheapest one by far is Astrostar Astro Star Laser Projector Cosmos Light Lamp, at just $15. The pictures look amazing. However, the reviews are something else.

Saturday, January 4, 2014

Toolbox Boombox

While I was home for winter vacation, I quickly grew bored without access to my electronic tools and projects. To entertain myself, I took some speakers, and amplifier, and an empty tool case and combined them all into a boombox. 

Saturday, December 28, 2013

Raspberry Pi Visual Ping Indicator / Roommate Tracker

A frequent problem in my apartment is the lack of a consistent sleep schedule among my roommates. It's hard to tell when someone is asleep in their room, and when someone is gone and their door is closed. One of my roommates made a joke that I should build a device to track who is actually present in the apartment. So I did.