Agilent U1731B LCR Meter Teardown
A couple of weeks ago, I got myself an Agilent U1731B LCR meter on eBay. These handheld LCR meters are […]
Interfacing a Noritake VFD Module with Arduino
I recently bought a Noritake-itron VFD module off eBay. Noritake-itron specializes in making vacuum fluorescent displays for many OEMs. As […]
Inside an Agilent 66312A Two-Quadrant Power Supply
Typically, a lab power supply can only operate within a single quadrant. Take a positive voltage power supply for example, […]
Extreme Teardown of a Panasonic PT-L780U 3LCD Projector
Have you ever wondered what is inside of a 15 year old commercial color projector? Well we will find out […]
OOK/FSK Modulation Using PE42420 RF Switch
I recently bought a few Peregrine Semiconductor‘s PE42420 RF Switch evaluation boards on eBay. The PE42420 is an absorptive SPDT […]
Teardown of an MEDA PLM-100 AC Magnetometer
I did a teardown a while ago on a cheap eBay electromagnetic radiation detector, and if you recall the performance […]
Inside a Datum 9300 Time Code Generator
IRIG time code generators (not to be confused with the ones used in video and film industry) are often used […]
Controlling an HMC624LP4E RF Attenuator Using Arduino
I recently found a Hittite (acquired by Analog Devices in 2014) HMC624LP4E evaluation board gathering dust in my miscellaneous PCB […]
Teardown of an MVMT Dual USB Port Wall Outlet Adapter
I bought a USB wall outlet adapter recently so that I can free up my wall outlets while charging my […]
Unusual Failure Mode of an APC Surge Protector
Recently I got hold of a dead APC SurgeArrest power strip that was about to be thrown out in my […]
Keithley 775A Programmable Counter TCXO Repair
In my last post, I did a teardown of the Keithley 775A programmable counter/timer. And while feeding a 10 MHz […]
Keithley 775A Programmable Counter Teardown
I just picked up a Keithley 775A programmable frequency counter from eBay. Specification-wise, this counter is very similar to the […]
HP 8566B Spectrum Analyzer “YTO Unlock” Repair
While I was making a video on how to use HP 8671A as the frequency reference for an improved version […]
A Quick Look at the M5Stack ESP32 Development Kit
I recently received an M5Stack ESP32 development kit from Banggood. Although I have not used any ESP32 based development boards […]
Teardown of an EcoSmart 60W Dimmable G16.5 LED Bulb
Although LED light bulbs have been around for a while, I have not been able to totally replace all my […]