I have two questions regarding the following product for the engineering team. 2x7A DC Motor Driver
SKU: DRI0041
The battery supply voltage is expected to be between DC 7 ~ 24 V. What is the motor output voltage range the driver supports?
What does this statement mean “It is very considerate to own an Photo Coupler isolation for all the signals in case of that the motor’s Reverse Current would interfere the control signals.” Are we expected to put optocouplers between each of the pins connected to the digital pins on the Arduino?
We’ve put one of these driver boards under the microscope to read the chip numbers from the photo Liam has highlighted. The text on the chips reads as follows:
EL
357N
C908
A quick google search of EL357N C908 seems to confirm they are opto-couplers.
Thank you for taking the time to check. Good to have it confirmed. I’m waiting for the chip to arrive so I can start working with it. Exciting stuff!
Can I ask another question regarding motor output voltage in general. If I intend to run a 15V motor, can I supply for example 10V or 20V input to a motor driver and still expect to be able to run the motor? If I supplied less, does that mean the motor receives less current overall?
The motor driver output voltage will be at the same level as the input voltage, it will be a square waveform that mirrors what the control signal does, with a voltage level equal to the supply voltage.
The current output of the motor driver will be determined by whatever current your load draws.
The operating voltage range of your motor should be listed in its specifications.
Gotcha, thanks for claifying Trent. Wasn’t sure if motor drivers usually have voltage regulation built into them. I guess not. Appreciate your valuable input.
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