The VCC pin is the power supply for the motors and should be connected to an appropriate power source depending on your motor requirements (2.7V to 10.8V). To begin, connect the motor power supply. Now that we know everything about the module, we can start hooking it up to our Arduino! However, this specific DRV8833 breakout board connects these current sense pins directly to ground, effectively disabling the current limiting feature. This is generally accomplished by connecting a resistor between AISEN pin and ground to set the limit for Motor A, and another resistor between BISEN pin and ground to set the limit for Motor B. The DRV8833 can actively limit the current passing through the motors. So, if you want to monitor fault conditions on the driver, you will need to connect an external pull-up resistor (or use a microcontroller input with its built-in pull-up enabled). DRV8833 Motor DriverĪt the heart of the module is an integrated H-Bridge driver IC from Texas Instruments that is optimized for motor driving applications – The DRV8833.īy default, this pin remains in a floating state. So let’s dive in and discover the remarkable capabilities of the DRV8833 motor driver. That is why the DRV8833 is not only more energy-efficient than BJT-based motor drivers, but it also generates far less heat, making it safer to use for longer periods. MOSFETs have almost negligible voltage drop, meaning that nearly all the voltage from the power supply is delivered to the motor. Instead of using BJTs, the DRV8833 uses MOSFETs. Thankfully, modern motor drivers like the DRV8833 really shine when it comes to efficiency. This can be a significant disadvantage for projects that must run for extended periods of time. Over time, this can result in a considerable amount of energy loss and, in some cases, cause the driver to overheat. The energy from that voltage needs to go somewhere, and it indeed does it dissipates as heat. The issue with BJTs is that they have an on-state voltage drop. However, they have a major downside – they use bipolar junction transistors (BJTs), which makes them extremely inefficient. They are reliable and have been used in hundreds, if not thousands, of projects. Without a doubt, L293D and L298N are the go-to motor drivers for Arduino projects.
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