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 […]
Adding Strain Relief to an Existing cable
Not all cables have proper strain relief built to the connector ends. This is particularity true for some of the […]
DTM0660 Datasheet Translated
I have received quite a bit of positive feedback since I wrote about the hacks on DTM0660L based multimeters last […]
The Spectrums of Three Cheap Laser Pointers
A couple of months ago, I converted my EP200Mmd monochromator into a scanning monochromator and tested the spectrums of quite […]
Building A Laser Oscilloscope
You can generate some pretty amazing patterns by shining a laser onto a mirror mounted on a vibrating speaker cone, […]
An Old Tung-Sol Germanium Transistor
I recently bought a few old power transistors from eBay. These are PNP Tung-Sol germanium transistors. According to the date […]
Server Moved to Linode
I just moved my site from my own server to linode‘s VPS hosting. So you should see some pretty significant […]
Peltier Cooler Module Repair
I bought a couple of Peltier cooler modules on eBay a while ago for some experiments. Of course, as I […]
QFN Soldering Using SchmartBoard
I wrote a tutorial a while ago on how to hand solder fine pitched LGA/QFN chips using perfboards. While The […]
Westinghouse L2410NM LCD Power Supply Repair
My seven year old 24 inch LCD monitor (Westinghouse L2410NM) started to flicker recently, so I decided to take a […]
Tektronix 2445 Teardown
I bought an old Tektronix 2445 150 Mhz oscilloscope on eBay the other day. It was listed under “For Parts/Not […]
A Bidirectional Level-Shifting Buffer for Raspberry Pi
The current sourcing/sinking capability of the I/O pins on Raspberry Pi is quite limited. According to the Wiki page, the […]
BK 4011 Function Generator Teardown
I got a used BK Precision 4011 5MHz function generator recently. The 4011 model is rather old and this particular […]
Adding a Barrel Jack And a Switch to Raspberry Pi
I got myself a Raspberry Pi (Model B V2) last month. After having played with it for a while, I […]
100K 5% Carbon Film Resistor Value Distribution
It is well understood that resistors are typically binned in such a way that for a given tolerance the actual […]