Month: August 2015
Teardown, Repair & Analysis of a Rohde & Schwarz FSH3 3.0GHz Portable Spectrum Analyzer
In this episode Shahriar examines a faulty R&S FSH3 100kHz – 3.0GHz Portable Spectrum Analyzer. This exceptionally dirty unit does not power on and is missing a power supply and battery. After verifying the correct operation of the battery charger circuit and keypad the problem...
Continue ReadingEEVblog #777 – Keithley 177 Microvolt DMM Repair
Come on a ride as Dave repairs an intermittent Keithley 177 Microvolt DMM, garden paths and all. EEVblog #777 - Keithley 177 Microvolt DMM Repair -...
Continue ReadingVisualizing RF Standing Waves on Transmission Lines
This video illustrates how RF (radio frequency) standing waves are created in transmission lines - through the addition of the forward (transmitted) wave and the reflected wave that results from improperly terminating the line or matching the load or antenna to the transmission line...
Continue ReadingArduino DDS AD9850 Antenna Analyzer
This is a no frills DIY Analyzer intended for frequencies ranging from 1.6 to 30 Mhz. This simple Antenna Analyzer could be a nice project for anyone just getting started in setting up a station on the HF bands. Arduino DDS AD9850 Antenna Analyzer -...
Continue ReadingWiFi smoke detector
by Proto G @ instructables.com: This is a simple WiFI Smoke Detector that texts me when it senses smoke. I made this for my battery storage area in case of a lithium polymer fire. I still have all of my regular smoke detectors installed and I don’t suggest relying only on this, but...
Continue ReadingBuild a Motion Control Rig for Time-Lapse Photography
by Tyler Winegarner and Chris Bordeleau @ makezine.com: If you dig around in your camera’s settings long enough, you’re almost assured to find that it has a mode to create time-lapse videos — those magical, time compressing movies that can turn any hillside or street corner...
Continue ReadingWXR3031 rework station will replace you three devices
Soldering, deslodering, hot-air works but also a record of your work in a PC – this is the Weller WXR 3031. Good soldering station is usually a fundament of a workplace. Desoldering station is usually a necessity if you work in development or service. And a hot-air station? – this...
Continue ReadingTerahertz Optical Transistors Beat Silicon
by R. Colin Johnson @ eetimes.com: PORTLAND, Ore.--Purdue University researchers have demonstrated a CMOS-compatible all-optical transistor capable of 4THz speeds, potentially over a 1000 times faster than silicon transistors. Nano-photonic transistors processed at...
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