I found myself an xplained-mini board and am trying to use it to control a relay module (the keyes-sr1y).
So I connected the relay module in about the same way as I saw in most arduino examples, expecting it to work the same.
Now the problem is that the voltage on PD1 drops to around 2.4V whenever the module is connected, instead of the 5V that it is supposed to give. Does anyone know what the cause of this is, and how to solve this problem?
Thanks in advance