u/AbbreviationsOver693

I'm pretty new to electronics and I think I just killed my Pico 2 W.

I was wiring a PCA9685 to control some SG90 servos. I had a 4×AA battery pack connected to the PCA9685 power terminals, but I accidentally connected the PCA9685 V+ pin to the Pico's 3.3V pin.

After that, whenever I connect the Pico to my PC via USB, it gets noticeably hot and my PC no longer detects it.

I’ve disconnected everything from it now and I’m not powering it anymore.

Did I most likely damage the Pico permanently? Is there anything I can safely test to confirm whether it’s dead?

Also, for future reference, my understanding is:

- 4×AA → PCA9685 V+

- Battery − → PCA9685 GND

- Pico 3.3V → PCA9685 VCC

- Pico GND → PCA9685 GND

Feeling pretty stupid right now 😭 Any advice would be appreciated.

I am new to Tesco, I joined in May but my store was under renovation so I was doing shifts in other stores. I have used till there but those were newer smart tills. My main store is PFS, we have the old legecy tills.

When we were closing tonight, my Shift leader came to me and told me that the till is short by alot. I was the only one on the till today. He just asked me if I was doing regular till checks that's it.

Now I am anxious if they will fire me or something.