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QA101B Mixed Signal Oscilloscope
QA150 High Side Current Sense Amp
QA350 Microvolt DC Volt Meter
QA401 Audio Analyzer
Quick Look: A Generic TPA3255 Design
November 11, 2017
This time, we purchased a TPA3255-based no-name class D amp that is commonly seen on E-bay or Amazon for around $60 or $70.
ASIO and Hypermiling THD
July 12, 2017
Hypermiling is the act of driving a car with extreme efficiency so as to maximize the miles per gallon achieved. It requires a careful understandin...
June 20, 2017
The QA401 software supports the ability to make swept measurements. You can even write your own measurements in DotNet (C++, C# or Visual Basic) an...
Simple Isolated +/-15V Split Rail
June 08, 2017
There are a lot of solutions out there for generating split +/-15V from a single DC voltage, but all are lacking in some way or another. Either the...
QA401 and USB Noise
March 12, 2017
The QA401 relies on USB power. This is a great convenience because it means setup and making a measurement is quick and easy. But not all USB power...
QA401 Update 1.50
January 26, 2017
We’ve had some features in the queue for a while on the QA401 that made it out in the 1.50 release. Remember, the goal with the QA401 isn’t the be-...