I'm currently following the tutorial "Electronics Fun Kit" by ELEGOO. The goal is to connect the power supply module with the breadboard in order to provide a 3.3V / 5 V source.
After connecting the power supply module and powering it with a 12V adapt, the LED of the module is on.
Therefore I'm assuming that I've powered it correctly.
Now when setting the jumper of the power supply module to 3.3V, I am able to measure this voltage (3.30V) on the breadboard, by using my multimeter (set to 20V DC.) So far so good.
But when setting the jumper of the power supply module to 5V, I somehow measure 11.47V. How is this possible? Is it a typical "beginner" mistake or is the hardware not ok?
PS: I know that the probes are not correctly connected to the multimeter. I've already changed that, but I still have the same measurement results
Best Answer
My guess is that you have fried the supply circuit when you first measured the voltage using the current input of your multimeter.
This will most likely have shorted the supply out, letting the input voltage be applied directly to the 5V output.