ELogs/Electronics: Difference between revisions
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SimonJolly (talk | contribs) (Created page with "Electronic Log for Electronics Development == Oxford == === Power supply board === * 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 co...") |
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== Oxford == | == Oxford == | ||
[mailto:peter.hastings@physics.ox.ac.uk Pete Hastings] | |||
[mailto:mark.jones@physics.ox.ac.uk Mark Jones] | |||
=== Power supply board === | === Power supply board === | ||
| Line 17: | Line 20: | ||
** >7.5V to DDC boards | ** >7.5V to DDC boards | ||
* Should be able to switch off LEDs | * Should be able to switch off LEDs | ||
* Necessary to switch | * 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? | |||
'''Ready for experimental visit to Trento, 28th September 2025''' | |||
=== DDC Photodiode Board Rev.F === | |||
* Remove '''RESET''' connection from '''CC2''' pin on '''all''' DDC board USB-C connections | |||
== Imperial == | == Imperial == | ||
Revision as of 15:31, 28 July 2025
Electronic Log for Electronics Development
Oxford
Power supply board
- 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?
Ready for experimental visit to Trento, 28th September 2025
DDC Photodiode Board Rev.F
- Remove RESET connection from CC2 pin on all DDC board USB-C connections