First time here so apologies if I make any mistakes forum decorum or electronics wise. I’m currently setting up a model that will have lights and sound. I will need to power the arduino, adafruit wave shield, and many LEDS off a 12v 3.7A power supply. I would normally use the Vin but it’s limited to 1 amp output and I will need more than that.
This is hopefully a basic question but how do I properly wire up the 12v 3.7A power supply to a series of LEDs and also power the Arduino? I will not have access to USB power for the Arduino. I have included a partial Fritzing diagram that includes one LED cluster and what I’m assuming the proper wiring is to power the arduino and the LEDS without using the Vin.
I’m using a 1k resistor after the TIP120/TO-220 MOSFET as the go between the 12v and arduino.