For those Arduno pins which I didn’t use, I included pin header connections so that they are available in case we want to use them for something in future. I used both the top and the bottom layer for running the connections. This PCB will actually act as an Arduino MEGA shield because we will be able to directly connect it on top of the Arduino Mega board. Nevertheless, in order to keep the electronics components organized and get rid of the wiring mess, I designed a custom PCB using the EasyEDA free online circuit design software.
As an Amazon Associate I earn from qualifying purchases. Arduino Mega Board ………………….… Amazon / Banggood / AliExpressĭisclosure: These are affiliate links.Li-Po battery …………………………….…… Amazon / Banggood / AliExpress.
#Servo motor arduino turning a wheel Bluetooth
HC-05 Bluetooth Module …………….… Amazon / Banggood / AliExpress.NRF24L01 Transceiver Module…….… Amazon / Banggood / AliExpress.DRV8825 Stepper Driver………………… Amazon / Banggood / AliExpress.Stepper Motor – NEMA 17……………… Amazon / Banggood / AliExpress.You can get the components needed for this project from the links below: This is optional, but I’m planning in a future video to combine this project with my Arduino Robot Arm project, and for that purpose I would need 5V for driving its servo motors.
I also included a dedicated 5V voltage regulator which can provide around 3A of current. I also included a simple voltage divider which will be used for monitoring the battery voltage and an LED connection for indicating when the battery voltage will drop below 11V. For the radio communication we are using the NRF24L01 module, and for the Bluetooth communication we are using the HC-05 Bluetooth module. For powering the steppers and the whole robot we will use 12V power supply, and in my case, I will use a 3S Li-Po battery which provides around 12V. So we will control the four NEMA 17 stepper motors using four DRV8825 stepper drivers, or also we could use the A4988 stepper drivers.
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