I've got a Pimoroni Display-O-Tron 3000 and a HC - SR04 ultrasonic sensor. I want to use the Display to output the distance that the ultrasonic sensor reads. However, the DOT 3000 uses all the 5v pins. How can I get the vcc of the HC-SR-04 onto 5v, does it even need to go on the pi's 5v or can use a 6v battery and a resistor?
According to this, I shouldn't connect it to a 3v3 pin otherwise I might undervolt it:
I can't give you guys a picture, otherwise I would have, but the display-o-tron uses up the first 26 of 40 pins on the Pi. I am using a Pi 2, I am fairly new to electronics so please explain it understandably.