Saturday, February 25, 2017

Pervasive Displays EPD Extension Kit Gen 2 Review

My previous post about my epaper business card attracted a lot of attention, most of it good. After publishing that project I was contacted by Pervasive Displays, who offered to send me an epaper demo kit in exchange for me writing something about it.

This isn't really a proper review, more of a look at the screens and their software. For a better review, check out this one by Rei Vilo.

Wednesday, August 17, 2016

Epaper Business Card

Recently, after graduating with a EE degree from the University of Colorado Colorado Springs and working at X-IO for a few months, I found myself out of a job. This gave me plenty of time to work on projects! (Update: I have a full-time position now!)

I realized that it might be nice to have business cards. The problem with normal (paper) business cards is that once I got hired they would all be obsolete. The solution: use epaper to have a business card you can program with new information at any time!

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.