For those following along, here is the Rev B USB µSupply.
Still preliminary, and not 100% checked & tidied up, but close.
Key points:
- Back to my original concept of dual 3 digit LED display (nice big easy to read 0.56") and dual (right angle) knobs to make it look'n'feel like a real power supply. No squinting at a small LCD, see the values across the room.
- One function push button for basic modes or set V/I display etc, same as original designs.
- 120mm x 50mm
- Battery powered from a standard 18650 cell
- Selectable battery or mains input with jumper. Allows 1A charging + full output operation.
- Max output 15.25V @ up to 500mA. Capable of higher current at lower voltages if really needed.
- Right angle riser board for the banana plugs, soldered onto the main board (no wiring).
- TO-220 LT3080 with bottom plate PCB used as heatsink.
- Construction is kinda like the attached, open style sandwich but with a PCB heatsink bottom plate. The top is clear acrylic.
- Micro USB charging (400mA) and isolated serial comms for, eh, whaever.
- Faster 1A charging using a 5V DC plugpack, which switches automagically
- Self test capability
- Small expansion board for, whatever. Maybe a fixed 5V USB output connector or something.
Schematic:
http://eevblog.com/files/uSupplyUSBrevB.pdfAnything I've goofed please let me know.
I don't want to do any more videos on it until I actually have a the new board built and working, then I'll likely do a flood. That prevents any more videos that lead in the wrong direction.
No correspondence will be entered into on the design or feature set

It's almost 1:30am, today's achievement ticked off, need sleep.

Dave.