Strips: Electrical Module & UV LED PCB Update Charilou Labitan - - PowerPoint PPT Presentation

Strips: Electrical Module & UV LED PCB Update

Charilou Labitan

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Update on the Electrical Module

Tom-Erik left after making the first electrical module. Next steps…

• Needed to make sure all the

wire bonds and connections are correct.

• Started to use the DAQ and

see how well it’s working.

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One problem with our connections when assembling: Originally we soldered the HVret and LV GND together at the test frame connector. I talked to Craig and found out we should have connected on the other side of the filter.

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We soldered a wire between the HVret via and a pad connecting to LVret. Other solutions: Peter – Scraped green solder resist near the top pad of R8 and fitted a 0R 0603 resistor across the gap. Ashley – On the hybrid, connected LVretand HVretlocally as close to the front-end as possible.

• According to Craig, these

connections will be unnecessary

• n the AMAC v1 compatible

frames.

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Using the DAQ

Able to capture chips…

• nce in a while.

Working on making the results more consistent. Work in progress.

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PCB Design for UV LEDs

Glasgow made a flex design for the UV LEDs and sent out a limited number of them to the collaboration. (We and Santa Cruz only received one each.) Problem

• Flex is prone to bowing
• LEDs are ‘squishy’ – can only touch

the flex when mounting it to a curing jig

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Solution: Make our own! With help from Timon and John Joseph (Engineering), I learned how to use KiCad and make a PCB Design. Schematic based on Glasgow’s flex design.

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Different than Flex

• Has bottom copper plate; almost as large as

PCB (mask slightly smaller than b. copper)

• 5 vias connecting each LED pad to b. copper

Similar to Flex

• 95mm x 4mm
• 10 LED Pads

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Next Steps…

• Doubling the number of LEDs – More flux, better cure
• More effective heat transfer: Number of vias versus size of the vias?

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