You should never make any connection on/to the GPIO whilst powered.
How should the Pi prevent from short circuits on the external HW - especially some VCC to GND?
You may want to add your own DC/DC to the external board, enabling the circuit via some GPIO pin (EN signal of your DC/DC chip). This will allow you to add whatever protection level you need and/or are willing to pay for (galvanic isolated I/O i.e.).
Btw..the DC/DC on a Pi Zero is not able to deliver anything close to 1.5A...
How should the Pi prevent from short circuits on the external HW - especially some VCC to GND?
You may want to add your own DC/DC to the external board, enabling the circuit via some GPIO pin (EN signal of your DC/DC chip). This will allow you to add whatever protection level you need and/or are willing to pay for (galvanic isolated I/O i.e.).
Btw..the DC/DC on a Pi Zero is not able to deliver anything close to 1.5A...
Statistics: Posted by aBUGSworstnightmare — Wed Feb 07, 2024 6:28 am