I recently bought this reader: https://www.priority1design.com.au/rfidrw-e-ttl.pdf
and am reading it with my Arduino Uno and then controlling a servo (Amazon.com: 4Pcs SG90 9g Micro Servos for RC Robot Helicopter Airplane Controls Car Boat: Toys & Games) depending on what the RFID reads.
I have it working when connected to my PC to power the arduino.
(Servo getting powered by 5v arduino pin, rfid reader getting powered by plugging into the top pins on here with 5v: https://www.amazon.com/gp/product/B08JYPMCZY/ref=ppx_yo_dt_b_asin_title_o02_s01?ie=UTF8&psc=1 plugged in with wall adapter: Amazon.com : R-Tech12V 1A Switching Power Supply Adapter 5 Pack - Black, UL-Listed : Power Converters : Camera & Photo)
When I upload try to use an external power source for the servo, the power seems to glitch in and out to the power supply. I was reading a bit that this is due normally to issues of overloading, but I am a bit confused where my issues lies.
Here's the voltages my project includes:
RFID Reader: System power input line. +5.5 to 15V DC
Servo Motor: 4.8-6V
Power supply: output: 3.3V 5V
Here's how I have it setup in the breadboard powered with the 12v adapter.
I'm assuming my issue possibly is that the RFID reader is taking more than 5v from the power supply and causing issues with the servo, but I'm not sure how to confirm that. I can plug in my RFID reader alone with the 12v power supply, but I'm not sure how to connect those wires to pins on the board, so help with that would be appreciated if that is the issue.
Thank you in advance!!