DDS-based Rasp Pi function generator
Pass the Hat
© Lead Image © lightwise, 123RF.com
A touch display, a case, and a custom add-on board transform the humble Rasp Pi into a high-performance function generator that rivals expensive commercial offerings.
Modern laboratory instruments are a marvel of integration, combining hardware, software, and often mechanical components to produce versatile and highly functional units that bring real value to the engineers and technologists who use them. In this article, I aim to show how such an instrument might be put together by combining the Raspberry Pi with several elements to provide a low-cost and flexible function generator that can rival its more expensive commercial cousins on price and possibly beat them in terms of flexibility.
Function Generator
A signal or function generator is a versatile frequency source able to output a signal in a number of output waveshapes and at an adjustable amplitude and frequency from direct current (DC) up into the high-frequency electromagnetic radio frequency (RF) region, depending on the application. Sophisticated instruments can also include frequency, phase, or amplitude modulation useful for testing radio transmitters and receivers.
No engineer's workbench is complete without such an instrument. Together with an oscilloscope, it allows an engineer to characterize the frequency and phase response of an amplifier, to test and calibrate counters and frequency meters, and to replace built-in oscillators in devices under test or during development.
[...]
Buy this article as PDF
(incl. VAT)
Buy Linux Magazine
Subscribe to our Linux Newsletters
Find Linux and Open Source Jobs
Subscribe to our ADMIN Newsletters
Support Our Work
Linux Magazine content is made possible with support from readers like you. Please consider contributing when you’ve found an article to be beneficial.
News
-
Hannah Montana Linux Is Back!
Developer Noah Cagle decided the world needed the once obscure but beloved Linux distribution and gave it a decidedly pink refresh.
-
System76 Refreshes the Lemur Laptop
If you're looking for a laptop with tons of power and battery, look no further than the latest iteration of the System76 Lemur Pro.
-
More than 43 Million Lines of Code in Linux Kernel 7.2
Using the cloc utility, Michael Larabel of Phoronix discovered that Linux kernel 7.2 has over 43 million lines of code.
-
Kubuntu Focus Goes Ultra
The Kubuntu Focus team has upped the performance ante of its M2 and Zr laptops with the latest, greatest CPUs from Intel.
-
Linux Gamers May Soon See Less Mouse Lag in KDE Plasma
Gamers using KDE’s Plasma desktop have been suffering from a slight input delay in mouse movement that could lead to getting fragged.
-
Three Lines of Code Improve Linux Storage Performance
A developer changed three lines of code, giving Linux storage performance a 5% bump.
-
AUR Hit Again with Malicious Packages
Once again the Arch User Repository is plagued by a high volume of malicious packages.
-
Alpine Linux 3.24 Features Fresh Desktops and a Newer Kernel
If you're a fan of Alpine Linux, it's time to upgrade because the latest version has been released with KDE Plasma 6.6, Gnome 50, and Linux kernel 6.18 LTS.
-
EU Open Source Strategy Plays Key Role in Tech Sovereignty Package
Comprehensive measures adopted by the European Commission aim to reduce dependency on non-EU countries.
-
Linux Foundation Report Indicates AI Driving Tech Hiring
Within growing security and skills gaps, AI has been found to be a positive driving force behind tech hiring trends in Europe.