Turning Useless Power Supplies Into High-Speed Chargers! #aliexpress #gadget #review #usb #charger
Why It Matters
Converting cheap, obsolete power supplies into USB‑PD chargers cuts costs, expands DIY capabilities, and reduces electronic waste, offering immediate value to creators and small enterprises.
Key Takeaways
- •Cheap USB‑PD boards convert barrel‑jack supplies to chargers.
- •Boards accept 24 V input, output 3.3‑21 V via USB‑C.
- •Adjustable voltage supports up to ~4 A output current.
- •Ripple voltage and efficiency meet USB‑PD specifications comfortably.
- •Ideal for DIY projects and repurposing obsolete power adapters.
Summary
The video demonstrates how three inexpensive USB‑PD boards—available for roughly €1 each—can transform discarded barrel‑jack power adapters into versatile USB‑C chargers. By connecting a common 24 V supply to the board’s barrel input, the device outputs programmable voltages ranging from 3.3 V to 21 V, effectively turning a useless power brick into a high‑speed charging source.
Key performance metrics include an adjustable output up to just under 4 A, ripple voltage within acceptable limits, and overall efficiency that matches the USB‑PD specifications. The reviewer notes that the board remains cool during operation, indicating solid thermal management despite near‑maximum current draw.
Specific observations highlighted in the review are: “by simply plugging a 24 V supply into one of these boards, we basically turned this useless power supply into a USB‑C PD power source,” and “the output current was limited to just below 4 amps… the IC didn’t get super hot.” These points underscore both the ease of implementation and the reliability of the conversion.
The broader implication is a low‑cost, sustainable solution for hobbyists, makers, and small businesses seeking flexible power without purchasing dedicated chargers. Repurposing existing adapters reduces e‑waste and lowers prototyping expenses, making high‑speed USB‑PD accessible to a wider audience.
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