Wavetek 1045 RF Power Meter Teardown
I bought a Wavetek 1045 RF power meter off eBay a few weeks ago. It came with a 13787 detector […]
How to Drive a Latching Relay
Latching relay (a.k.a. impulse relay) can be turned on and off by momentarily applying a voltage across the relay coil. […]
T is for TWT
Traveling-wave tube (TWT) is mainly used to amplify signals in the microwave frequency range. Unlike most vacuum tubes, which had […]
Visualizing Comparator and Op Amp Hysteresis
Hysteresis can be added to a comparator circuit to improve its stability, especially when the input signal is noisy. In […]
Testing an RTL-SDR Spectrum Analyzer
Using software defined radio such as the popular RTL-SDR (1, 2) as a spectrum analyzer is nothing new (examples can […]
Keithley 197 Battery Option Build
I have been quite happy with my fixed-up Keithley 197 5 ½ digit bench meter purchased from eBay (you can […]
Using Arduino Due’s True Random Number Generator
Arduino Due uses an Atmel SAM3X8E ARM Cortex-M3 CPU, which has a native hardware based True Random Number Generator (TRNG). […]
Building And Characterizing A DIY RF Power Sensor
Ever since I got my HP 436A power meter, I have been looking around hoping that I could obtain a […]
On Arduino Due PWM Frequency
I just got myself a couple of Arduino Due boards. While they were released almost two years ago, I have […]
HP 8642B Teardown Pictures
In my last post, I showed my LED backlight mod of the HP 8642B synthesized signal generator. And during the […]
HP 8642B Backlight Mod
If you take a look at the picture below, you may recognize immediately that it is a picture of an […]
A Four Channel Remote Control Using EnOcean Pi
In my last couple of blog posts, I did a brief overview of the EnOcean Pi sensor kit from Newark […]
Compiling and Running EnOcean Sensor Kit Example Code
In my previous post, I took a quick look at the EnOcean sensor kit from Newark for Raspberry Pi and […]
A Quick Overview of the EnOcean Pi and EnOcean Sensor Kit
I recently got the EnOcean Pi and EnOcean sensor kit from Newark. The sensor kit includes a temperature sensor module […]
Wavetek 907 Repair, YIG Oscillator Teardown
As I mentioned in my previous posting, there was an issue with my Wavetek 907 microwave frequency generator. While everything […]