Thank you for your comment!
Hi, thank you! I didn't face this problem, I tried to power the relay board with the 3.3V of the NodeMCU and it worked. In this way you give power to the relay board after the NodeMCU is powered on. I hope this can be useful!
3D Printing With Circuits Class
Beginner 3D Printing Class
WiFi Smart Power Strip With NodeMCU
WiFi Smart Power Strip With...View Instructable »