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RPi4 PSU with older models
Posted: Tue Jun 23, 2020 5:37 am
by YariLei
Hi,
Most sellers advice not to use the official RPi4 power supply with older Raspberry models. While I understand that they use a different plug, is there really any good reason why not to use it, if you have one of those tiny USB-C - microUSB adapters? For some reason the RPi4 PSU is much cheaper in my local stores than the RPi3 PSU, and I've got those adapters at hand.
Cheers!
Best regards,
Yari
Re: RPi4 PSU with older models
Posted: Tue Jun 23, 2020 6:14 am
by ejolson
YariLei wrote: ↑Tue Jun 23, 2020 5:37 am
Hi,
Most sellers advice not to use the official RPi4 power supply with older Raspberry models. While I understand that they use a different plug, is there really any good reason why not to use it, if you have one of those tiny USB-C - microUSB adapters? For some reason the RPi4 PSU is much cheaper in my local stores than the RPi3 PSU, and I've got those adapters at hand.
Cheers!
Best regards,
Yari
I think it will work. What does your adapter look like?
Re: RPi4 PSU with older models
Posted: Tue Jun 23, 2020 6:37 am
by fruitoftheloom
YariLei wrote: ↑Tue Jun 23, 2020 5:37 am
Hi,
Most sellers advice not to use the official RPi4 power supply with older Raspberry models. While I understand that they use a different plug, is there really any good reason why not to use it, if you have one of those tiny USB-C - microUSB adapters? For some reason the RPi4 PSU is much cheaper in my local stores than the RPi3 PSU, and I've got those adapters at hand.
Cheers!
Best regards,
Yari
The 4B PSU is 5.1v 3A whilst the older PSU is 5.1V 2.5A, the Raspberry Pi SBC will only draw what is required so there is no reason not to use either PSU on any Raspberry Pi SBC.
Re: RPi4 PSU with older models
Posted: Tue Jun 23, 2020 7:17 am
by YariLei
ejolson wrote: ↑Tue Jun 23, 2020 6:14 am
YariLei wrote: ↑Tue Jun 23, 2020 5:37 am
I think it will work. What does your adapter look like?
It's a small USB-C to microUSB adapter, similar to what you get with USB-C phones, except the port adaptation is from USB-C female to microUSB male.
Yari
Re: RPi4 PSU with older models
Posted: Tue Jun 23, 2020 8:44 am
by jamesh
YariLei wrote: ↑Tue Jun 23, 2020 7:17 am
ejolson wrote: ↑Tue Jun 23, 2020 6:14 am
YariLei wrote: ↑Tue Jun 23, 2020 5:37 am
I think it will work. What does your adapter look like?
It's a small USB-C to microUSB adapter, similar to what you get with USB-C phones, except the port adaptation is from USB-C female to microUSB male.
Yari
That should work fine.
Re: RPi4 PSU with older models
Posted: Tue Jun 23, 2020 10:05 am
by FTrevorGowen
jamesh wrote: ↑Tue Jun 23, 2020 8:44 am
YariLei wrote: ↑Tue Jun 23, 2020 7:17 am
ejolson wrote: ↑Tue Jun 23, 2020 6:14 am
I think it will work. What does your adapter look like?
It's a small USB-C to microUSB adapter, similar to what you get with USB-C phones, except the port adaptation is from USB-C female to microUSB male.
Yari
That should work fine.
+1 and, FWIW, I used one ("AG" here:
https://www.cpmspectrepi.uk/raspberry_p ... pterCables ) when measuring the "current loading characteristics" of USB 'C'/Pi PSU's:
https://www.cpmspectrepi.uk/raspberry_p ... ne_2019.29
Trev.
Re: RPi4 PSU with older models
Posted: Tue Jun 23, 2020 10:59 am
by pidd
Being picky ....
Usually better to use a cable adaptor than a "hard" adapter. The hard ones have far more leverage and make it easier to accidentally damage the socket on the motherboard.
More connections can make more instability (physically and electrically),
But generally it will be fine.