They'll also drain completely and be ruined rather than cut off before they drain too far like the one I linked yes I did look at that link, or more specifically I had previously already tried to make sense of the full USB 3.1 spec that is linked from there. The hobby RC batteries aren't, they require an intelligent external charger. The advantage of the battery pack I linked rather than one of the RC batteries you'll find on Amazon is that it has PCB protection, so all you have to do is provide the proper voltage input for charging and it'll handle the rest including balancing the cells and keeping them from overcharging. More if you have a fan blowing over the heatsinks. You'll need a multi-meter to fine-tune the output to 5v (or whatever you need), but it'll handle plenty of power. ![]() If you have a bit of money it'd be easier to get something like and a buck like. Is there a particular reason you're specifically wanting those USB portable power output battery packs? You just happen to have them on hand? And for whatever reasons need to avoid spending any more money? One thing you don't want with Lithium is higher heat. That could get into a bad situation and faster power drain or higher heat. I'd also put in some diodes leading out from each power bank to ensure you don't actually charge the others up from one that's at a higher voltage while also having power drawn from them all. Perhaps what I'm trying to do can't be done without additional circuitry to trick the powerbank? The other USB-C cable I cut in half has two additional pairs of shielded wires (one pair has blue and yellow wires, the other pair has purple and orange wires), not sure what pins they correspond to or if they are helpful or not?Īs far as I can tell it seems I need to supply a signal of some sort on the "CC" wire(s) before the powerbank will supply any voltage? Perhaps I need to start with a different type-C cable (eg a type-C to type-C?). I tried the same steps as above, but the powerbank won't supply any power over USB-C. One was a USB 2.0 cable and hence only had the same four USB wires as the other USB cables. ![]() I've cut a couple of USB-A to USB-C cables in half. The type C output is proving more problematic though and I'm not sure how to coax it into supplying power to a strip. For each one I did the following:ġ) Found an old USB cable with a type A connector and cut off the other end.Ģ) Shorted out the white D- and green D+ data wires (so the powerbank will allow higher current to flow).ģ) Attached the black and red power wires to the LED strip.Ĥ) Plugged the type A connector into the powerbank. Getting the two USB-A ports working was straightforward. I want to use all three outputs to power several WS2812 LED strips. All three can be used at once but the maximum combined output is 5A. I have a Vinsic VSPB304 powerbank which has three outputs - two USB-A (rated at 2.4A each) and one USB-C (rated at 3A).
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