I am designing a test jig (within a 6U rack) that mates with 6 removable trays. Each tray can hold 16 sensors which can also be removed. The system will be intended to function in the following way:
- Technician will populate all trays with sensors,
- Trays are entered into rack and all sensors are tested,
- Trays are removed from rack and sensors that failed are removed first and binned. The rest are passed and bagged.
My issue is production have requested for indicators next to each of the sensors on every tray that indicate a pass or fail.
When the boards are disconnected from the rack they lose power and although LEDs and external battery would be the first solution....they have asked for alternative solutions. Is there such a component as an indicator relay or something along those lines? If anyone has a good solution for this issue then please let me know.
Software GUI is currently ruled out also as they believe looking at a screen and then at a PCB could lead to human error...