Circuit Card Autocalibration Fixture

Not all circuit cards received by the project sponsor are properly calibrated, so the goal of this project is to design and build a circuit card calibration device that tests card integrity quickly and easily at the sponsor’s manufacturing facility. Specifically, the output voltage of the cards needs to be verified at various operating temperatures. The design was a 7-by-14-by-4-inch device that uses a microcontroller to take periodic voltage readings from a circuit card placed in a temperature chamber cycling between -55 and 70 degrees Celsius. The microcontroller exports the voltage and temperature data to a microSD card for transfer to a computer at the manufacturing facility. This solution is fault-tolerant, easy to use, and will reduce cycle times and manufacturing costs.