connection of peripheral devices (keyboard, lcd display, usb) to the arduino.

arduino board button cad capacitor chip circuit component computer conductor connection connector cpu crystal data decoder design device devices diagram digital diode display drawing educational electric electrical electricalschematic electronic electronics engineer engineering four-digit ic indicator interface key keyboard layout lcd led liquid micro microcontroller module multimedia outputting pcb peripheral port printed processor project radio reading resistor schematic scheme seven-segment software technical uno usb vector