Option 3:
Would it be easier to have 3 LM1084 with that regular black heatsink:
- one to power all PICs and ICs.
- one to power the 3 LED strips.
- one to power the 4 LCDs.
That way I'd get minimal noise on VDD/VSS, and limit heat loss to more manageable levels.
A sort of distributed power management system.
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