Loop Antenna - Assembly and First Test Today I finished assembling the loop antenna and ran some tests on it for the first time. The results look great so far and after this I'll be ready to put it on
Oddwatt Amplifier Assembly In 2016 I built a sound system including speakers, preamplifier, subwoofers, and amplifier. I chose a tube amp design based on the "Oddwatt" design by Bruce Heran. If you want your own tube
loopantenna Loop Antenna - Annealing Copper Many people assemble their loop antennas using copper pipe and 45 degree angle connectors to form an octogon. This approximates a circle well enough, but introduces some electrical resistance to the loop. I
Infrared Photography The sensors inside many consumer cameras on the market today are sensitive to infrared light. This isn't normally desireable, so manufacturers add an infrared-blocking filter in front of the sensor. It is possible
4pi 4PI Speaker Build This is a build log for my 4PI speakers. These high-efficiency speakers have a 15" woofer and a horn-loaded tweeter.
audio 4PI Speakers and Oddwatt Amplifier In 2016, I set out to design and build a sound system for our house. Going into the project, I knew I wanted to build a tube amplifier. I'm not much of an
Droplet Photos - Part 2 In Part 1, I showed my setup for taking water droplet photos by using an eyedropper and an IR emitter/receiver pair. After learning from that setup, I created a fully-automated droplet setup
Droplet Photos - Part 1 Droplet photography is interesting to me because it combines two interests of mine: photography and electronics. I've done multiple photo sessions over the years with different technical methods of synchronizing the shots. In
highvoltage High Voltage Experiments Flyback transformers are a great tool for experimenting with high voltage. These transformers were commonly used in CRT monitors/televisions and are designed to generate the high voltage necessary for the operation of
moveo Robotic Arm - Part 2 - Assembly In part 1, I shared some of my notes about the BOM for the Moveo robotic arm. In this article I'll share some pictures of the assembly.All of the plastic parts on
moveo Building a Robotic Arm - Intro and BOM notes A coworker recently told me about an open-source 3D-printable arm design available online. Its called the "Moveo" from BCN3D. You can find more info about it here. I am going to write a
BEAD BEAD Update - Using CMSIS and FATFs Interestingly, these libraries seem like they will eventually become obsolete and replaced by the HAL (STM32Cube) libraries from ST. People don’t seem too happy with the code from STM32CubeMX so far, and the author of the SD card library I am using has said he will not port over to HAL.
BEAD BEAD Update - Getting Started I decided to use Eclipse and setup GCC as a compiler. I'm using openocd for debug. Some of the following links have been helpful in getting started
BEAD BEAD Data Logger - Intro I want to design a data-aquisition board which can be used as a general-purpose data logger. It should be small, low power, and very simple to use. I worked on a similar project