I have an Arduino which is being powered by a 9v, 2 amp power supply. I have about 20 relays which are powered by 5 volts each. I do not want to over work the voltage regulator on the board, so I would like to add another (possible 2) 5 volt regulator that I bought on amazon. I am planning to:
- Connect the regulators VIN to the Arduino's vcc (9 volt)
- Connect the regulator's GND to the Arduino's GND.
- Connect the regulator's VOUT to the Relay's VCC
At this point, can I also connect the regulator's VOUT to the Arduino's 5volt out?
Also, is it possible (or advisable) to add second voltage regulator to the first in a parallel configuration?