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The booster adapter from above at an angle: a long black board with a USB-C socket in the middle of its far edge between two square black inductors, a six-legged converter chip and a black diode beside each, a small trimmer in each top corner, and a plus and minus mark over two columns of three pins at each end.
VR

View it in VR

This board opens in a VR headset: life-size, or big enough to stand beside, with every pin and every part named where it sits. Open this address in the browser on a headset such as Apple Vision Pro or Meta Quest.

learn.lonelybinary.com/vr/bbpwdbt
You have this

Breadboard Power Adapter, Booster up to 28 V

Three USB-C breadboard power adapters that plug into both pairs of rails at one end: a standard board with a 5 V / 3.3 V switch per side, a step-down that sets 1.25 to about 3.5 V, and a booster that sets about 4.3 up to 28 V. Which way round they go, why 5 V reads 4.7, and the half-amp fuse that limits all three.

Each side
4.3–28V, by trimmer
At 12 V
160mA, both sides
Fuse holds
0.5A in total
Start here · 01 One plug, two railsOpen the board in 3D

Both boost converters, their inductors and trimmers, and why the back's 2 A and 28 V are the chip's limits rather than the board's.

Product questions & answers ↓

Same plug, different voltage

All three fit the breadboard the same way and share one half-amp fuse. Pick by the voltage your circuit needs.

See this board 5 / 3.3V, by switchBreadboard Power Adapter, Standard 5 V / 3.3 V, 3-Pack3.3 V budget: 200 mA, sharedSee this board 1.25–3.5V, by trimmerBreadboard Power Adapter, Step-Down 1.25–3.5 VRegulators: 2 × AMS1117-ADJ
You have this4.3–28V, by trimmerBreadboard Power Adapter, Booster up to 28 VAt 12 V: 160 mA, both sides
The whole handbook12 articles · 55 minQuick referencePDF · 415 KBDatasheetPDF · olimex.comModel (GLB)GLB · 3.2 MBCAD (STEP)ZIP · 2.7 MBDrawing (PDF)PDF · 1.4 MBDrawing (DXF)ZIP · 121 KBPinout and specsThe pin table, and the questions people ask first
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Product questions

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Breadboard Power Adapter, Booster up to 28 V

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Need another

Not on general sale yet. Reply to your order and we will sort out a spare — quote bbpwdbt.

Order or missing parts?

Email us or reply to your order, and quote bbpwdbt — that identifies the product. If something is missing from the bag, your order is the record of what shipped.

Take it with you

Point a phone camera at the code and this page opens there. It is the same address as the one printed on your box, so it is also what to show someone you are passing the board to.