I want to buy a power supply that is good both for my PIC16 environment (breadboard with 3.5V - 5V power bank) and for my raspberry 3PI.
Than I choice a 5V 3A power supply with a USB exit from Amazon:
but, reading product details, I see:
Input: 100-240V 50-60Hz 0.5A
Output: 5V 3A - 9V 2A - 12V 1.5A
I can't understand output values, there isn't a button to adjust the voltage/amperage!
How do I know it won't burn my cards??