Right now I am onto a new project where I am building an obstacle avoiding landrobot.
I use an arduino pro mini as my board and I have a few hc-sr04 sensors here at home. The problem I have right now is that many pins is occupied with other modules, motors and bluetooth.
So right now on my Pro Mini the VCC is occupied by my BLE device and I was wondering if there is a possibility to solder a few wires together so that my BLE device share the same VCC with 4 other hc-sr04 modules? I do this regularly with the GND where I solder multiple wires together and share the GND across different modules which works fine.
The idea is to power the arduino itself through the "RAW" pin. I have a power distribution board that connects to my battery/motor and the VIN pin of the PDB goes to the "RAW".
I try to avoid a breadboard to decrease the size as much as possible so if it were to be possible then that would be the optimal solution for this project.
Something I am also wondering is if it is possible to use these hc-sr04 on both the analog pins and also the digital pins. I do not have enough space to fit all the sensor cables on the digital pins but if I use the analog pins also then they all would fit. Is this possible? Each HC-sr04 has two cables that needs to be inserted (Trig and echo) and right now I have 3, 4 free and all the analog pins 0, 1, 2, 3, 4, 5 which is enough to fit them all.