.. note:: Hello, welcome to the SunFounder Raspberry Pi & Arduino & ESP32 Enthusiasts Community on Facebook! Dive deeper into Raspberry Pi, Arduino, and ESP32 with fellow enthusiasts. **Why Join?** - **Expert Support**: Solve post-sale issues and technical challenges with help from our community and team. - **Learn & Share**: Exchange tips and tutorials to enhance your skills. - **Exclusive Previews**: Get early access to new product announcements and sneak peeks. - **Special Discounts**: Enjoy exclusive discounts on our newest products. - **Festive Promotions and Giveaways**: Take part in giveaways and holiday promotions. 👉 Ready to explore and create with us? Click [|link_sf_facebook|] and join today! Play with Arduino ========================== **1. Basic** .. toctree:: :maxdepth: 1 1.1_get_start 1.2_digital_write 1.3_analog_write 1.4_digital_read 1.5_analog_read 1.6_digital_input_control_output 1.7_analog_input_control_output 1.8_serial_read 1.9_digital_input_pull-up 1.10_state_change_detection 1.11_interval **2. Projects for Each Component** .. toctree:: :maxdepth: 1 2.2_led 2.3_rgb_led 2.4_led_bar_graph 2.5_7-segment_display 2.6_74hc595 2.7_4-digital_7-segment_display 2.8_led_matrix_module 2.9_i2c_lcd1602_module 2.10_active_buzzer 2.11_passive_buzzer 2.12_servo 2.13_motor 2.14_stepper_motor 2.15_button 2.16_slide_switch 2.17_tilt_switch 2.18_touch_switch_module 2.19_keypad 2.20_ir_receiver_module 2.21_relay_module 2.22_potentiometer 2.23_joystick_module 2.24_mpr121_module 2.25_rotary_encoder_module 2.26_photoresistor 2.27_thermistor 2.28_sound_sensor_module 2.29_water_sensor_module 2.30_ir_obstacle_avoidance_sensor 2.31_pir_module 2.32_dht11_module 2.33_ultrasonic_module 2.34_mpu6050_module 2.35_rfid-rc522_module **3.Funny Projects** .. toctree:: :maxdepth: 1 3.1_Reversing_Aid 3.2_Pedestrian_Crossing_Button 3.3_Overheat_Monitor 3.4_Guess_Number 3.5_Access_Control_System