GPIO start pulse problem

[isdv]

Hi! I develop board based on NRF52832. P0.08 is connected to the MOSFET transistor.

The transistor switches the relay. During start (power on or reset) on GPIO there is a short impulse which leads to click of the relay.

The impulse at start is both with a firmware, and without firmware.

In what can the problem be?

[isdv]

Sorry. Made one more such board which has no this problem. Similar to production defect.

[Kenneth]

I guess you need to take a look at the datasheet for the MOSFET to find what voltage is required to turn it ON, and then measure on the CONTROL pin to find the voltage supplied during power on reset. It sounds odd that it will trigger by itself.