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Background
Background
In order to screen a large batch of sensors whose delivery was expected in the future, multiple solutions were discussed. The current method of individually testing these sensors was too slow, so I proposed different solutions to test batches of sensors at a time. One of these solutions involved logging data from 18 sensors at once using a Tennsy 4.1 and an amplifier for each channel. The testing would involve thermal cycling and data needed to be read at minimum before and afterwards, with data during the test being a bonus.
Problem Statement
Problem Statement
Develop a way to more rapidly screen a batch of sensors.
Breadboard prototype circuit
Process
Process
Spoke with the electrical engineer about the feasibility of logging data from multiple sensors using an Arduino or similar, he suggested using the Teensy for its large number of analog channels
Consulting the datasheet for an amplifier that the electrical engineer selected, I made a circuit that would connect the sensor, amplifier, and Teensy 4.1
Tested a circuit on a breadboard using different gains for the amplifier and evaluating the sensitivity of the result
Chose a gain that saturated the amplifier at a value that was slightly above the peak expected value of the sensor
Layed out a PCB with 18 copies of this circuit
Potential logging PCB
Results
Results
In the end it was decided that the sensors could be adequately screened in smaller batches without data during cycling and it was not worth the time savings to develop this board. However, the concept exists for future use if many sensors need to be tested at once and have data recorded during cycling.
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