An 8 channels, 200ksps, 10 bit, data acquisition system for the Raspberry Pi for $35. The system supports AC/DC coupling, a programmable voltage range, and a variety of user options.
The RAS-DAS-1 software includes a Remote Scope Application and Remote Spectrum Analyzer which runs on Linux, Mac OS and Windows. There are command line utilities which run on the Raspberry Pi itself to capture data, as well as a server based program to allow you to capture data from across a network.
The command line utilities are standard executables which can be called from any language (like Python, Perl, csh, sh, etc.). In addition, the software API is available so that you can program in C/C++.
Audio Explorer Card
Since the RAS-DAS-1 is capable of running at multi-channel audio rates, we created a multi-channel audio input card which includes 4 electret microphones, as well as 4 microphone inputs (3.5 mm jacks), plus the high gain amplifiers for microphone level signals. There are also 4 additional (un-amplified) connectors to RCA-style jacks as well as 3.5 mm jacks.
The enclosure allows provides for open access on all four sides so that the Raspberry Pi connectors are fully accessible, while allowing for good airflow and ventilation.
The Raspberry Pi is held in place from the mounting holes on the top (Currently only Rev B boards are supported). The transparent case allows for viewing the LED status indicator lights, while providing a significant amount of protection.
One or more accessory cards are held in place from the bottom. A ribbon cable connects the accessory card to the Raspberry Pi. The ribbon cable connection ensures there is no mechanical stress is ever placed on the Raspberry Pi's 26 pin GPIO connector.
When the enclosure is open, there is full access to the accessory card on the bottom.
Fun - Science Experiments
We think the Raspberry Pi would be an excellent way to engage students in science and math-related activities. With the Audio Explorer, RAS-DAS-1 and Raspberry Pi, students can perform science experiments like measuring the speed of sound, determining where a sound originated from, and use echoes to determine how far away a wall located.
Additional details, documentation, and information can be found on our web site here.
Note: We will ship to countries outside of the U.S. Details of tax, shipping options and fees are being explored, and will be provides later.
Risks and challenges
We need kickstarter funding to bring the RAS-DAS-1, and Audio Explorer to production. The hardware designs are completed. The software is nearly complete (95%). The main risks left are to
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- secure a high quality, low-cost, manufacturer
- begin production, and ship units