ELogs/Electronics

Electronic Log for Electronics Development

Oxford

Ready for experimental visit to Trento, 28th September 2025

Power distribution board required for QuARC.
Provide power for Raspberry Pi and DDC boards from single DC input:
- 5V/5A for Raspberry Pi via USB-C
- >7.5V (5A?) for DDC board daisy chain via 2.5mm barrel
Single USB-C PD input: 20V/5A
- Needs USB-C PD voltage negotiation chip
Fallback option with 20V DC 2.5mm barrel jack input
LEDs to indicate each voltage is provided correctly:
- 20V input
- 5V to Raspberry Pi
- >7.5V to DDC boards
Should be able to switch off LEDs
Necessary to switch between input power supplies?
Ensure both power outputs stable: no drop-outs!
- Potential for USB-C PD to drop out when voltage renegotiated?

Upon completion of power distribution board

Return Rev.F boards and ZMOD boards to be fixed: ✓
Remove RESET connection from CC2 pin on all DDC board USB-C connections
Resize DDC board to accept Hamamatsu S12362 16-element photodiode array in place of Hamamatsu S12915-16R single photodiodes
Reduces pitch from 3mm to 2.5mm
2 photodiode arrays per DDC board (2 x 16 element arrays = 32 channels)

Upon completion of Rev.F board

Integration of scintillating fibre profile monitor based on design from Blake Leverington, University of Heidelberg
Hamamatsu S17285 photodiode arrays to couple to scintillating fibres
Interface board needed between USB-C connection from FPGA and photodiode arrays
Acquire data; distribute timing signals