hello everyone
i am a beginner at arduino
i want to make a robot which has 6 sg 90 servo motors
1 for head one for hip 2 for each hands
it also has two dc motors with a l289n motor driver for mobility
it uses a ultrasonic sensor too
i know i cant power all these directly from arduino.
so pls tell me how can i power these motors?
it should be able to be kept inside the robot.
also i have a mini bread board if that helps.
thank you
You need to add up all the maximum servo current draw to get the required amps needed for the servo power supply.
Most likely the servos need a 6v power supply rated at this amperage.
The L298N motor current and voltage ratings will determine the power supply these motors will need.
AA batteries are often used where short term use is all that’s required.
Note: the servo and drive motor power supply GNDs need to be common with the Arduino GND.
BTW, always show us a good schematic of your proposed circuit.
I would suggest using a different driver then the L298N/ You can lose about 2.8 volts through it. It is the older bipolar technology. Pick a device that has MOS outputs, you will lose maybe 0.2 volts or less. The additional energy will be used by the steppers and not burnt up as heat.
Pololu has a line of modern motor drivers and each has a page of instructions on its use.
What is the rated voltage and stall current of your DC motors?
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