Overheating Issue? OV5640 Temperature Test with ESP32CAM board  

thanks for the information👍

Update: It seems that the camera flex module connectivity is documented in the OmniVision OV2640 Camera Module Hardware Application Note which is available online. I missed it at first because the AI Thinker PCB schematic uses a 24-pin FPC connector symbol whose numbering is reversed compared to the OmniVision App Note. If you reverse the pin numbering for pins 1 to 24, , the connectivity make sense. Now I just need to find a similar App note for the OV5640 module.

Very informative!

❤

Another thing to consider is that the OV5640 only allows a maximum of 3.0 volts on its digital I/O V(DD-IO) rail whereas the OV2640 allows 3.3 volts. So is possible that the OV5640 module is using the ESP32-CAM's +3.3V rail (flex connector pin #14) for V(DD-IO) and thereby overdriving the sensor chip. If on the other hand it used the +2.8V rail (flex connector pin #21) for the sensor's V(DD-IO), the sensor's logic HIGH output might be too low for the ESP32 to reliably recognize. We would need to examine the OV5640 module's flex schematic to know for sure. I have searched but have been unable to find one online. Do you ever seen one? I may have to unsolder the sensor from the flex to figure out its connections. Once I know how the module is actually wired, a proper fix might not be all that difficult.

Could there be another manufacturer making the OV5640/ESP32 with a better design (different regulator, heat sink, etc)?

I think you fell in love with lady ESP32😁

do you know if the XIAO ESP32S3 Sense can use the OV5640? And if so, is there an overheating issue?

Hi! Did you see this issue with the Auto-Focus version of the camera?

Yes, the solution would be to replace the 1.2V regulator on the AI-Thinker board with a 1.5V regulator, Torex XC6206P152MR. That is the SOT-23 package which I think is correct. That should disable the OC5640's internal regulator.