Another common question is can I use the Raspberry Pi for data acquisition on its own?
The short answer is yes, but for digital signals only and only at relatively slow speeds. If you're serious about data acquisition, especially analog or mixed signal work, you'll need a peripheral device to plug into Raspberry Pi to provide the necessary I/O.
The original I/O peripheral and probably still the most widely used is Gert van Loo's Gertboard. It provides access to Piís GPIO and ATmega pins, a number of digital buffers, LEDs, button switches and high current output drives making it a very useful general purpose I/O board. However, for data acquisition (and generation) such as one might need to build an oscilloscope or waveform generator, its SPI connected D/A and A/D convertors are the important components.
For low speed data acquisition, up to 72kSps in the case of the Gertboard, it is possible to build a simple scope or waveform generator with Raspberry Pi. However like Gertboard, all the A/D boards we know of, as others have also reported, max out at sample rates well below 1MSps.
BitScopes like BS10 (shown here as part of a low cost electronic projects lab built around Raspberry Pi) are different from other peripherals for RPi.
BitScope can capture multiple analog and digital signals at very high sample rates (up to 40MSps in some cases) or it can stream continously at lower sample rates but in all cases sampling is done without loading the Raspberry Pi CPU or requiring a real-time operating system for low jitter sampling.
It's also more convenient because it connects and is powered via USB so it can work with a Raspberry Pi in a case. BitScope uses an industry standard IDC-26 Smart Port connector for analog and digital signal I/O, power and ground. It can even power and control small external circuits and is compatible with accessories like these dual channel active differential probes.
BitScope and Raspberry Pi make a great combination for many high speed data acquisition applications. See the related posts below for more details and stay tuned for some new announcements towards the end of the year.
|Build a powerful mixed signal workstation with one simple 3D print !||Sep 3|
|Physical Computing with BitScope, Blade and Raspberry Pi.||May 27|
|Raspberry Pi 3 Launch and BitScope Blade||Feb 29|
|Physical Computing with Raspberry Pi and BitScope!||Dec 01|
|BitScope Micro with Raspberry Pi Touchscreen Display!||Sep 09|
|BitScope, Ozberry & Pimoroni at Sydney Mini Maker Faire!||Aug 12|
|BitScope Blade for Raspberry Pi at Hannover Maker Faire!||Jun 05|
|BitScope DSO 2.9 Now Available.||Jun 02|
|Getting Started with BitScope||May 08|
|BitScope Micro In-Line Data Acquisition||Apr 02|
|Where to Buy BitScope Micro & Accessories.||Feb 19|
|BitScope ARM Platform Compatibility||Feb 10|
|Bootstrapping Raspberry Pi 2 for BitScope||Feb 05|
|Raspberry Pi 2 and BitScope Performance||Feb 02|
|BitScope Micro & Raspberry Pi in Education at BETT||Jan 21|
|BitScope Connection Ports Explained||Dec 19|
|BitScope Micro and Oscilloscope Probes||Dec 10|
|Raspberry Pi Model A+ or B+ or B+ Slimline?||Nov 14|
|Electronic Measurement with BitScope & Raspberry Pi||Nov 12|
|Hands on with BitScope Micro at electronica 2014||Nov 11|
|BitScope Micro Video Tutorial with Farnell element14||Nov 10|
|BitScope Micro and Raspberry Pi at electronica 2014!||Nov 06|
|BitScope Micro element14 Webinar Review.||Nov 03|
|BitScope Micro Webinar with element14!||Oct 29|
|element14 launches BitScope Micro for Raspberry Pi!||Oct 27|
|BitScope Micro Diagnostic Port Explained.||Aug 16|
|MagPi talks Raspberry Pi B+, HATs & BitScope.||Aug 04|
|Raspberry Pi B+ BitScope x 4 = 8 analog + 32 logic !||Aug 01|
|BitScope Model 10 or BitScope Micro?||Apr 25|
|BitScope Micro, what's in the box?||Apr 17|
|BitScope Micro Questions & Answers||Apr 12|
|BitScope Micro (New Product) for Raspberry Pi!||Apr 11|
|BitScope Workshop at OzBerryPi||Apr 8|
|Optimizing real-time waveform display for Raspberry Pi||Mar 17|
|Low cost networked data acquisition with Raspberry Pi.||Dec 17|
|BitScope Server, shared remote access for any BitScope!||Dec 15|
|Automated Waveform Analysis with Raspberry Pi||Nov 09|
|Sydney BitScope, Online Demo Updated.||Oct 30|
|BitScope Touch Screen User Interface||Oct 28|
|Network access for USB BitScopes via Raspberry Pi.||Oct 24|
|BitScope Ed at OzBerryPi, Presentation Review.||Oct 21|
|BitScope and friends at OzBerryPi Maker Space||Oct 20|
|How to Install BitScope DSO on Raspberry Pi||Oct 18|
|Electronic Projects Lab for Raspberry Pi||Oct 17|
|BitScope Ed, an Educational Blog about Electronics.||Oct 09|
|Visualizing sound with Sonic Pi and BitScope||Oct 05|
|How to Install Raspbian and BitScope on Raspberry Pi||Sep 29|
|High speed data acquisition with Raspberry Pi||Sep 25|
|BitScope Software for Raspberry Pi Oscilloscope||Sep 27|
|BitScope Raspberry Pi Oscilloscope||Sep 25|