int clockPin = 2; 

int latchPin = 3;  

int dataPin = 4;    

byte leds = 0;    

void setup() {

  pinMode(latchPin, OUTPUT);

  pinMode(dataPin, OUTPUT);  

  pinMode(clockPin, OUTPUT);

}

void loop() {

  leds = 0; 

  updateShiftRegisterR();

  delay(100);

  for (int i = 0; i < 8; i++){

    bitSet(leds, i);    

    updateShiftRegisterR();

    delay(100);

  }

  leds = 0; 

  updateShiftRegisterL();

  delay(100);

  for (int i = 0; i < 8; i++){

    bitSet(leds, i);    

    updateShiftRegisterL();

    delay(100);

  }

}

void updateShiftRegisterL(){

   digitalWrite(latchPin, LOW);

   shiftOut(dataPin, clockPin, MSBFIRST, leds);

   digitalWrite(latchPin, HIGH);

}

void updateShiftRegisterR(){

   digitalWrite(latchPin, LOW);

   shiftOut(dataPin, clockPin, LSBFIRST, leds);

   digitalWrite(latchPin, HIGH);

}

sketch.ino

# Wokwi project

This is a Wokwi project. Please edit this README file and add a description of your project.

## Usage

1. Add parts by clicking the blue "+" button in the diagram editor
2. Connect parts by dragging wires between them
3. Click the green play button to start the simulation


README.md

diagram.json

transistor

transistor.chip.json

// Wokwi Custom Chip - For docs and examples see:
// https://docs.wokwi.com/chips-api/getting-started
//
// SPDX-License-Identifier: MIT
// Copyright 2023 Meriç Karademir

#include "wokwi-api.h"
#include <stdio.h>
#include <stdlib.h>

typedef struct {
  // TODO: Put your chip variables here
} chip_state_t;

void chip_init() {
  chip_state_t *chip = malloc(sizeof(chip_state_t));

  // TODO: Initialize the chip, set up IO pins, create timers, etc.

  printf("Hello from custom chip!\n");
}
