3 ms·

$6 USB-C breakout for selectable voltage, https://learn.adafruit.com/adafruit-husb238-usb-type-c-power-delivery-breakout/overview https://learn.adafruit.com/ada

$6 USB-C breakout for selectable voltage, https://learn.adafruit.com/adafruit-husb238-usb-type-c-power-delivery-breakout/overview https://learn.adafruit.com/adafruit-husb238-usb-type-c-power... > The HUSB238 USB PD sink chip is neat in that you can either use jumpers (really, resistor selection) to set the desired power delivery voltage and current or you can use I2C for dynamic querying and setting.

btgeekboy 2y ago
I combined one of those cheap breakouts with this variable voltage power supply - https://www.amazon.com/gp/product/B0861LGM15 https://www.amazon.com/gp/product/B0861LGM15 - and a 3d printed enclosure to make a benchtop power supply pretty affordably. Just use your laptop's power supply and now you can have any voltage and limited amperage.
- deleted 2y ago
  [deleted]
- jwildeboer 2y ago
  I am waiting for an updated version that does PD 3.1, so it can go to 48V/5A.
  - dtx1 2y ago
    That's 240W. You could charge an e-Bike via USB-C with that. Insane.
    - jwildeboer 2y ago
      Yep. That's exactly what I am looking for. Use USB-PD to charge small electric vehicles in a standardised way ;) See https://jan.wildeboer.net/2024/06/Charging-SEVs-A-Modest-Proposal-AODP/ https://jan.wildeboer.net/2024/06/Charging-SEVs-A-Modest-Pro... where I describe the concept and https://github.com/manuelbl/usb-pd-arduino/wiki https://github.com/manuelbl/usb-pd-arduino/wiki where there is Open Source code (and schematics) to do PD sniffing and sink negotiation.
rainbowzootsuit 2y ago
The AliExpress search term for similar devices is "trigger board" or "decoy board." I'm seeing them as low as ~10/$.
- schmidtleonard 2y ago
  Have these gotten mature enough to actually use? A few years ago, every single one I tested would just give you a different voltage if it couldn't trigger the correct voltage, which is obviously terrible.
  - rainbowzootsuit 2y ago
    My experience is good so far with them, but it's good to get a couple of automobile lights to wire in series or parallel to load them. As the saying goes: "With Ali Express you test, don't guess!"
  - Eisenstein 2y ago
    They go to the next lowest voltage, because some PD capable supplies don't provide all the voltages. Most are missing 12V, unfortunately.
- kube-system 2y ago
  The electronics are small enough to put into a USBC connector -- which is also a handy form factor: https://www.amazon.com/Euogeudel-4-9ft-Trigger-Input-2-5mm/dp/B0BW4MC59B https://www.amazon.com/Euogeudel-4-9ft-Trigger-Input-2-5mm/d...

btgeekboy 2y ago

I combined one of those cheap breakouts with this variable voltage power supply - https://www.amazon.com/gp/product/B0861LGM15 https://www.amazon.com/gp/product/B0861LGM15 - and a 3d printed enclosure to make a benchtop power supply pretty affordably. Just use your laptop's power supply and now you can have any voltage and limited amperage.

deleted 2y ago
[deleted]
jwildeboer 2y ago
I am waiting for an updated version that does PD 3.1, so it can go to 48V/5A.
- dtx1 2y ago
  That's 240W. You could charge an e-Bike via USB-C with that. Insane.
  - jwildeboer 2y ago
    Yep. That's exactly what I am looking for. Use USB-PD to charge small electric vehicles in a standardised way ;) See https://jan.wildeboer.net/2024/06/Charging-SEVs-A-Modest-Proposal-AODP/ https://jan.wildeboer.net/2024/06/Charging-SEVs-A-Modest-Pro... where I describe the concept and https://github.com/manuelbl/usb-pd-arduino/wiki https://github.com/manuelbl/usb-pd-arduino/wiki where there is Open Source code (and schematics) to do PD sniffing and sink negotiation.

rainbowzootsuit 2y ago

The AliExpress search term for similar devices is "trigger board" or "decoy board." I'm seeing them as low as ~10/$.

schmidtleonard 2y ago
Have these gotten mature enough to actually use? A few years ago, every single one I tested would just give you a different voltage if it couldn't trigger the correct voltage, which is obviously terrible.
- rainbowzootsuit 2y ago
  My experience is good so far with them, but it's good to get a couple of automobile lights to wire in series or parallel to load them. As the saying goes: "With Ali Express you test, don't guess!"
- Eisenstein 2y ago
  They go to the next lowest voltage, because some PD capable supplies don't provide all the voltages. Most are missing 12V, unfortunately.
kube-system 2y ago
The electronics are small enough to put into a USBC connector -- which is also a handy form factor: https://www.amazon.com/Euogeudel-4-9ft-Trigger-Input-2-5mm/dp/B0BW4MC59B https://www.amazon.com/Euogeudel-4-9ft-Trigger-Input-2-5mm/d...