<![CDATA[External power to header ?]]>Need to connect 5V power direct to header and remove battery. No clear what header pin to connect to - 5V ?, BAT ? or the mysterious HPWR pins ? Anybody tried this yet ? Thanks.

]]>https://community.m5stack.com/topic/172/external-power-to-headerRSS for NodeFri, 13 Mar 2026 05:04:14 GMTThu, 12 Apr 2018 11:39:44 GMT60<![CDATA[Reply to External power to header ? on Fri, 13 Apr 2018 17:13:44 GMT]]>@drwino
:-)
Good luck.

]]>https://community.m5stack.com/post/839https://community.m5stack.com/post/839Fri, 13 Apr 2018 17:13:44 GMT<![CDATA[Reply to External power to header ? on Fri, 13 Apr 2018 15:38:15 GMT]]>Thank you for the detailed reply. I will try some of the options but first I will order a few M5Stacks so life can continue if we get blue smoke !

]]>https://community.m5stack.com/post/838https://community.m5stack.com/post/838Fri, 13 Apr 2018 15:38:15 GMT<![CDATA[Reply to External power to header ? on Fri, 13 Apr 2018 13:20:05 GMT]]>@drwino
I'm sorry for missprint. Of course pin "5V". :)
I said the best and most problemless way is to use the usb connector of M5Stack. You could make a special USB cable only with 5V.
All other methods have nuances.
See M5-Core-Schematic.
The simplified power scheme looks like this.
0_1523617639632_M5Stack2.png
VCC_5V, VCC_3V3, Vbat are connected to the bus, V_USB is not.
if you connect external power to VCC_5V then

  • A special USB programming cable with the USB 5V disconnected 'll not work. Course CP2104 is not powered.
  • If you want to program simply turn off the external power supply 5V. For example to use a jumper.
  • You can try to use a diode. But I do not have confidence.
  • The battery is not charged.
    0_1523617649260_M5Stack2_2.png
    I want to connect external 5V power to the V_USB wire and remove the USB-fuse.
    In this case all will powered and 5V from the USB is disconnected. Battery works too.
    All must have a common GND.
]]>https://community.m5stack.com/post/837https://community.m5stack.com/post/837Fri, 13 Apr 2018 13:20:05 GMT<![CDATA[Reply to External power to header ? on Fri, 13 Apr 2018 04:31:05 GMT]]>@x-dron I guess you mean connect to the 5V not pin 5. Pin 5 is GND. What happens if power is supplied to 5V pin and then you connect USB at same time for programming - I suppose you could make a special USB programming cable with the USB 5V disconnected.

]]>https://community.m5stack.com/post/832https://community.m5stack.com/post/832Fri, 13 Apr 2018 04:31:05 GMT<![CDATA[Reply to External power to header ? on Thu, 12 Apr 2018 19:54:39 GMT]]>
  • The easiest is to use the USB cable and connect the 5V to it.
    2.If you do not need a battery, you can connect to pin 5 on the bus.
    3.I'm going to use such a power scheme. Red lines are new wires.
    HPWR is not used in M5Stack now. it is presented only on the bus.
    0_1523562875175_M5Stack2.png
    • ]]>    https://community.m5stack.com/post/826https://community.m5stack.com/post/826Thu, 12 Apr 2018 19:54:39 GMT