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I am using L298n Dual Motor Controller to control two dc motors for my robot. But I want it to power the servos too. I have created this circuit design. enter image description here

can I power the SG90 Servo with L298n? Is there any fault in the circuit? Any Other suggestion will be appreciated.

Specifications of components:

DC Motor -

  • Voltage range: 6-9V
  • Motor speed: 188RPM
  • Reduction ratio 45:1

Servos -

  • Torque 25.0 oz-in (1.80 kg-cm) at 4.8V
  • Voltage 4.0V to 7.2V, 4.6V - 5.2V nominal
  • Running current with 5V supply (no mechanical load) 220 ±50mA
  • Stall current with 5V supply (horn locked) 650 ±80mA
  • Idle current with 5V supply 6 ±10mA

Battery - 7.4v Lithium Ion Battery 2600Mah

Motor Controller - L298n

Anshul Bansal
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2 Answers2

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That will be fine.

Servos and DC motors are quite power hungry so don't expect the battery to last very long.

joan
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According to this the power required for the servo is around 200mA (but yours may be a different module, check the current requirements for your own model).

So with 2 of them you'd need the L298 Motor driver modules' onboard 5V to be able to provide 400mA.

Depending on the module it could be providing anything from 50mA to > 1A - check with regulator it uses and find the current it can provide.

KennetRunner
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