I'm a total beginner when it comes to soldering, and recently I've been trying (and failing) to solder together a simple circuit I put together for a Raspberry Pi sensor.
Although it works fine on the breadboard, when I solder it onto one of my perfboardsperfboards, the sensor no longer turns on.
Here is a topdown view of my soldered circuit:
Here is a view of the connections (the red block is just covering up old connections from past attempts):
More picspictures of the connections.
Can anyone tell me what IWhat might I be doing wrong? Any advice for a noob like me?