SparkFun Electronics Commentsurn:uuid:214d0e4e-f1b1-d287-ce26-ac5b4c9f82492024-03-28T10:35:19-06:00SparkFun Electronicssantaimpersonator on DEV-14148 - DAQCplatesantaimpersonatorurn:uuid:532d32ed-213f-0518-20c1-9b5545d4696f2020-07-14T21:06:11-06:00<p>Hi there, it sounds like you are looking for <a href="https://www.sparkfun.com/technical_assistance" rel="nofollow">technical assistance</a>. Please use the link in the banner above, to get started with posting a topic in our <a href="https://forum.sparkfun.com/" rel="nofollow">forums</a>. Our technical support team will do their best to assist you.<p>Please feel free to <a href="https://pi-plates.com/support/" rel="nofollow">reach out to PiPlates</a>, the manufacturer. That being said, your scenario might be outside of the scope of either their and/or our technical support team.</p></p>
Vicent on DEV-14148 - DAQCplateVicenturn:uuid:c2ff9821-52dd-dba4-74e5-c15258e93e6e2020-06-30T17:54:56-06:00<p>How could we condition the digital analog inputs for 4-20mA? , industrial sensors work under these parameters. your comments please</p>
ShapeShifter on DEV-14148 - DAQCplateShapeShifterurn:uuid:c0ae53ee-ee95-9b57-7646-b9ea9f3e88392017-09-09T14:47:02-06:00<p>Hate to be pedantic, but Nyquist says that you sample at double the waveform frequency to be able to accurately measure the <em>frequency</em> of the signal. To accurately reconstruct the waveform, and measure more nuances than frequency, you must sample at a much higher rate than that. How much higher depends on your desired fidelity.</p>
Customer #913538 on DEV-14148 - DAQCplateCustomer #913538urn:uuid:8e767bdf-5d1a-76a8-41ea-5224082f808b2017-03-11T04:52:43-07:00<p>Pi-Plates communicate to the Raspberry Pi via the SPI interface. This limits the effective A/D sampling rate to about 1000 samples per second. The 50Khz bandwidth mentioned in another comment here is the maximum allowed input frequency.</p>
Customer #420025 on DEV-14148 - DAQCplateCustomer #420025urn:uuid:68eb60b0-8c6c-63fe-6d37-a09d855c33e92017-03-10T21:02:00-07:00<p>The user guide says the bandwidth is 50 kHz.<p>Sampling rate is defined as the number of samples acquired in one second.
The Nyquist theorem states that a signal must be sampled at least twice as fast as the bandwidth of
the signal to accurately reconstruct the waveform.</p><p>Given a max bandwidth of 50kHz, the sampling rate would have to be a minimum of 100 ksps.</p></p>
Tim the Enchanter on DEV-14148 - DAQCplateTim the Enchanterurn:uuid:2e5d701a-7ca2-59e5-211a-8d03759b141a2017-03-10T13:52:19-07:00<p>User guide says 50KHz limit.</p>
bhclowers on DEV-14148 - DAQCplatebhclowersurn:uuid:8391f4e6-38da-ba57-6445-85f0ec71936b2017-03-10T08:08:50-07:00<p>What is the ADC sampling frequency? The documentation does not immediately describe this feature in detail.</p>