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Ink Therapy

My body is a canvas.  These works of art were all done by Tiffiny Kaetzel at American Tattoo Studio in Knoxville, Maryland. Stylized logo of OKCupid, where my wife and I met in 2009 The tree, the last piece to go on my back, finished May 2018.

Logitech G500 Mouse Surgery

A mouse is very personal.  And the fact is, I don’t like how most of the modern ones feel.  This particular one, the Logitech G500, is about a decade old now (2009 release I believe).  I don’t do much gaming, but I find gaming input devices very good for productivity and image editing.  And us […]

Vintage Fan Collection

I love old fans, you know, the kind where your fingers are at risk while running. I like to keep them as authentic “as I found them” as possible.  Therefore, I’ll replace cords with cloth cords as needed, oil the motor, clean them up a bit, but otherwise leave the original patina intact. I currently […]

DeMuDa / DMD Chinese Lithium 12v 100aH Battery

Knowing that most lithium batteries sold from China have extremely inflated capacity numbers, and knowing it’s usually around 2-3 times as high as the real capacity, I decided to take a calculated risk and order a lithium pack direct from China via Alibaba.com.  This particular unit started to appear on Alibaba not too long ago, […]

Toshiba Model S75D-7272 Laptop (and Ditching Win8 for Win7)

AMD Ruby is smokin’, eh? Toshiba Model S75D-7272 Specs: AMD Quad-Core A10-5750M Accelerated Processor Windows 8 (I tell you how to load Win7 below) 8GB DDR3L 1600MHz memory (I popped in 16GB of 1600/CL9) 1.0TB (5400 RPM, Serial ATA) (Replaced with SSD) DVD-SuperMulti drive (+/-R double layer) (Replaced with SSD using a universal optical drive […]

Replacement of a bad capacitor in a power supply

I have a 400w PSU that has decided to emit a high pitched ear piercing squeal whenever a GPU load is applied. Upon opening it up, I discovered one capacitor on the secondary side of things is bulging at the top. I will be de-soldering this cap and replacing it: The bad capacitor The bad […]

Replacing a Power Supply Fan

There may come a time when you wish to replace your PSU fan with a quieter Panaflo model, or your old one just bites the dust. Most PSU fans are 80mm standard case fans. You can use a metric ruler to be sure you are getting a new one that will fit. The voltage must […]

Charging, Discharging and other battery care (FAQ)

Section Codes: NIMH – Q&A applies to NIMH & NICD Batteries LIPO – Q&A applies to Lithium Polymer batteries NIMHLIPO – Q&A applies to both chemistries NIMH – Q. Which is better, NiMH or NiCD? A. The power-to-weight ratio of NiMH is better than that of NiCD. Additionally, NiMH cells are available with greater capacity […]

How I charge a 1400v Cap Bank from a 12v Battery

I’ve gotten a few requests from people asking how I charge such a massive cap bank on 12v…well, here’s a schematic of my whole setup: Here are datasheets for the SCRs (SKKH) and clamping diode (SKKD): SKKH (SCR) SKKD (Diode)