Arduino ports may not show up due to faulty cables or corrupted drivers. Issues can occur in both Windows and Mac operating systems. Common problems include port not showing in IDE or Device Manager
Circuit designed for 7.4V lithium battery pack using two 18650 cells. Features CC and CV charging modes for faster charging. Can be modified for lower or higher battery packs
Tutorial shows how to build Arduino Bluetooth controlled robot car. Project completed in 3 days total, including 2 days for parts. Uses Arduino UNO, L293D motor driver, HC-05 Bluetooth module
DC motors can be controlled using PWM for speed and H-Bridge for direction. PWM adjusts input voltage through ON-OFF pulses with varying duty cycles. H-Bridge reverses motor polarity by closing specific switches
Project completed in 3 days total, including 2 days for parts and 1 day for assembly. Uses Arduino UNO, L293D motor driver, HC-05 Bluetooth module, and various motors. Custom PCB from JLCPCB improves appearance and assembly
L293D IC controls two DC motors or single stepper motor. IC handles voltages from 4.5V to 36V. Each channel delivers up to 1.2A peak output current