I'm doing a project for a school assignment and have some issue with my circuit. When I connected the breadboard to pi and to power, everything was working, I could read data from sensors and looked fine. However, after 30-50minutes my pi stopped working and a green LED is dead. I believe I have burnt my new pi. I just want to know what happened, what I'm doing wrong before I'll try to run this on a new pi. First of all, I would like to ask if there's a limit to wired sensors/devices because I'm using a few. Maybe it was an issue?

Let me describe my circuit:

• Serial LCD wired to SDA, SCL
• DHT11 temp&hum wired to GPIO4
• MCP3008 wired to MOSI, MISO, SCLK, GPIO5. I'm using only 1,3,5,7 channels. unused are wired to GND to reduce the noise. Used channels go down on the breadboard and are connected to soil moisture sensors (please see attached picture).
• 4 soil moisture sensors connected to analog inputs in MCP
• 4 diodes (red, green, blue, white), 4 resistors 220 R, each diode connected to GPIO to manage them from phone app I'm wiring 3V3 output to + in the breadboard and every sensor/device is wired to this power. I'm wiring 2x GND outputs to - (left and right side of the breadboard).

Please see attached pictures: