Miscellaneous – Kerry D. Wong

3D Print an HV Connector

In one of my previous posts, I did a teardown of a Bertan 225-20R high voltage power supply, which is […]

Not all cables have proper strain relief built to the connector ends. This is particularity true for some of the […]

I have received quite a bit of positive feedback since I wrote about the hacks on DTM0660L based multimeters last […]

A couple of months ago, I converted my EP200Mmd monochromator into a scanning monochromator and tested the spectrums of quite […]

You can generate some pretty amazing patterns by shining a laser onto a mirror mounted on a vibrating speaker cone, […]

I recently bought a few old power transistors from eBay. These are PNP Tung-Sol germanium transistors. According to the date […]

I just moved my site from my own server to linode‘s VPS hosting. So you should see some pretty significant […]

I bought a couple of Peltier cooler modules on eBay a while ago for some experiments. Of course, as I […]

I wrote a tutorial a while ago on how to hand solder fine pitched LGA/QFN chips using perfboards. While The […]

My seven year old 24 inch LCD monitor (Westinghouse L2410NM) started to flicker recently, so I decided to take a […]

I bought an old Tektronix 2445 150 Mhz oscilloscope on eBay the other day. It was listed under “For Parts/Not […]

The current sourcing/sinking capability of the I/O pins on Raspberry Pi is quite limited. According to the Wiki page, the […]

I got a used BK Precision 4011 5MHz function generator recently. The 4011 model is rather old and this particular […]

I got myself a Raspberry Pi (Model B V2) last month. After having played with it for a while, I […]

It is well understood that resistors are typically binned in such a way that for a given tolerance the actual […]