Powering USB-C 12/9V devices from robot's 12V battery

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Sergei Grichine

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Dec 12, 2024, 1:44:29 PM12/12/24
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It's not unusual nowadays to see USB-C powered devices, which require 9V or 12V voltage, negotiated via fast charge protocols: USB PD 3.0 (PPS) QC4+ QC4.0 QC3.0 QC2.0 for Apple 2.4A for Samsung AFC for Huawei SCP/FCP for MTK PE2.

You cannot just connect your robot's 12V battery to the USB-C or USB3 wires - that will likely release magic white smoke.

What you see in the photo below is a USB-C powered travel router and a little DC-DC negotiator device, which makes it possible. Links below.

image.png



Note:
1. Wi-Fi 6 (802.11ax) operates in the 2.4 GHz and 5 GHz bands, not the new "6GHz" band.

2. Travel routers help a bit when RPi is driving a robot outdoors, but a point-to-point bridge works much better ( https://www.amazon.com/gp/product/B09WMBD1S7 )

--
Best Regards,
-- Sergei

Gmail

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Dec 12, 2024, 2:50:05 PM12/12/24
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I always thought it was the gray smoke that magically made the devices work. What is this strange magical white smoke that you speak of? Is it more powerful?

😆



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On Dec 12, 2024, at 10:44 AM, Sergei Grichine <vital...@gmail.com> wrote:


It's not unusual nowadays to see USB-C powered devices, which require 9V or 12V voltage, negotiated via fast charge protocols: USB PD 3.0 (PPS) QC4+ QC4.0 QC3.0 QC2.0 for Apple 2.4A for Samsung AFC for Huawei SCP/FCP for MTK PE2.

You cannot just connect your robot's 12V battery to the USB-C or USB3 wires - that will likely release magic white smoke.

What you see in the photo below is a USB-C powered travel router and a little DC-DC negotiator device, which makes it possible. Links below.

<image.png>




Note:
1. Wi-Fi 6 (802.11ax) operates in the 2.4 GHz and 5 GHz bands, not the new "6GHz" band.

2. Travel routers help a bit when RPi is driving a robot outdoors, but a point-to-point bridge works much better ( https://www.amazon.com/gp/product/B09WMBD1S7 )

--
Best Regards,
-- Sergei

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