Setting : N0 // very important dont use NC.
Connection:
Coin Acceptor
+ 5V
- GND
Counter
Microcontroller
- GND
PIN 2 (Interrupt Pin 0)
Reminder: Always connect your GND to your arduino.
Connection:
USB to UART.
+ 5V
- GND
TX
Thermal Printer WH-A73R90-31E825
+ 5V // first pin of the power pins.
- GND // third pin of the power pins.
RX // third to the last of the TLL panel.
Reminder: Always remove jumper pins. User TLL communication for this.