I have a Pi 3 project that has quite a few things attached.
2 Magnetic door reed contacts wired in like this
This all works. However I wanted to add 2 relays. One of those twin relay boards that take 5v & GND plus GPIO poins. When I do this, the DHT sensors or the reed contacts stop working randomly.
I am suspecting I am reaching a voltage issue / power issue with the Pi. The power supply is 2.5a.
How do I start resolving this issue with the power?