by mjlorton @ youtube:
I go through the design and operation of the college power supply project. There is one minor error that still needs to be corrected but I think we are very close to a final design.
DIY Bench Power Supply #5 – Circuit Design and Operation - [Link]
by TheSignalPathBlog @ youtube:
In this episode Shahriar takes a close look at some of Dino-Lite’s USB Digital Microscopes and accessories. Two of the microscope stand offerings from Dino-Lite are demoed (model MS36B and RK-10) with a close look at their features and usability. All USB stands offer precision Aluminum bodies and flexible ranges of motion for a variety of viewing angles and distances.
Three USB Digital Microscopes from Dino-Lite are also demoed: models AM4113ZTL Dino-Lite Premier, AM4515ZTL Dino-Lite Edge and AM4815ZTL Dino-Lite Edge. These microscopes offers features such as large magnification combined with long working distances, adjustable polarizer, adaptable cap design, MicroTouch shutter button, extended depth of field (EDOF), extended dynamic range (EDR) and automatic magnification reading (AMR) which are all compatible with the provide DinoCapture 2.0 interface software.
Using Dino-Lite’s microscopes, a variety of electronics components are presented: An Analog Devices PCB containing 0102 footprint components, A PIC UV erasable Silicon die, a 325GHz horn antenna, a composite wafer probe with 150um pitch from GGB industries. Finally, the complete breakdown of a QuinStar mm-wave PA module is shown with microwave filters, pre-amplifiers, and a Wilkinson-based GaAs PA as a final stage.
Dino-Lite USB Digital Microscopes Review and Experiments - [Link]
Dave walks around the Electronex 2014 electronics exhibition at the Australian Technology Park, after hours when no one is there, and takes a peek at every stand.
Electronex 2014 – Walkaround - [Link]
Freeing the Lepton from its Iphone prison!
The smallest thermal imager - [Link]
A tutorial on feedback resistors in DC-DC converters and how to build a high current adjustable power supply using an LM2678.
Build a 2.5V to 14V 3A adjustable power supply! - [Link]
A look inside Flir’s thermal imaging add-on.
Flir One teardown - [Link]
What’s inside a dial-in pacemaker monitor system?
EEVblog #656 – Pacemaker Monitor Teardown - [Link]
In this series of video I want to take a look at what the industry has to offer in terms of DC Power and Energy Measurement Meters / Analyzers (Analysers). There seems to be a distinct lack of affordable instrumentation in this area.
DC Power and Energy Measurement Meters – Pt 1 - [Link]
This video describes how a classic double-balanced diode-ring mixer operates. Very basic mixer theory is quickly reviewed, which describes how the sum and difference of the LO (local oscillator) and RF (Radio Frequency) inputs are generated at the IF (intermediate frequency) output. It is also noted that the sum and differences of the harmonics of the LO and RF are also present at the IF output. Math waveforms on the oscilloscope are used to illustrate the operation of the mixer, and the actual waveforms from the mixer are compared to the math waveforms and the differences are discussed. A detailed description of the operation of the mixer is presented, including the switching action of the diodes. Finally, the frequency components are are expected from the mixer are shown on the spectrum analyzer.
How a Diode Ring Mixer works | Mixer operation theory and measurement - [Link]
Dave explains a big trap in high frequency measurement with your oscilloscope. Based on a viewer request, Dave demonstrates how to incorrectly and then correctly measure the signal output level over frequency of your function generator using your oscilloscope. Some whiteboard transmission line theory is thrown in as well.
EEVblog #652 – Oscilloscope & Function Generator Measurement Trap - [Link]