My project requires the motor to spin at different speeds from the lowest to the highest speed associated with if the voltage was 3V to 12V, so PWM would not work because there is still a wide range of speeds that I need below a duty cycle of ~40 that would've worked if I simply attached a DC power...

Actually both PWM and digital pot are rail-to-rail. It is the failure of most motors to start at 1/10th or even 1/3rd voltage that is confusing OP. The solution is to understand the concept of impedance, scaling, and offset. Easily implemented with op amp, properly biased transistor, or if frighten...

Is there a way to control the voltage with a raspberry pi without using PWM. Basically, having a 12V DC power cable, be able to change the voltage output and polarity direction using code? What can be used in conjunction with the raspberry pi to achieve this to change voltage directly and does not ...

Is there a way to control the voltage with a raspberry pi without using PWM. Basically, having a 12V DC power cable, be able to change the voltage output and polarity direction using code? What can be used in conjunction with the raspberry pi to achieve this to change voltage directly and does not i...

how do you determine what frequency to use for GPIO.PWM using raspberry pi and motor controller to power 12V DC motor

I am using a raspberry pi with a l9110s motor controller. I am trying to use PWM to be able to control the speed of a wheel attached to the motor similar to if a different number of volts from 1-12V were to be supplied to it. However i am confused calculating the frequency and duty cycle to use. How...

I am powering a DC motor with a raspberry pi and L9110S motor controller. What is the minimum voltage change i can provide to the motor (ex 0.1V, 0.01V, 0.001V)? From my understanding this is controlled in the python script using ChangeDutyCycle(x) so to what digit can I change x? ChangeDutyCycle(50...

What would be the best motor controller options for the raspberry to control 2 DC motors ranging from 3.5-12V with 1A each

Hi, I'm new to this and have never used a raspberry pi before. I have a peristaltic pump that has a 24V DC motor, with 300RPM nominal speed at 24V, and 2A maximum current (48W maximum input power). I want to be able to control the speed and direction through code. How can I go about this? What elect...