Control a driver that needs 0 to 5 volts with an Arduino Nano rp2040 connect

Official Hardware Nano Family Nano RP2040 Connect
1

Hi, I'm doing a school project and building a robot; I chose an arduino nano RP2040 to control everything in IoT or WiFi.

I have to control two drivers for two motors.

The problem is that the drivers require two signals (DIR, PWM) ranging from 0 to 5 volts but the nano RP2040 can only supply from 0 to 3.3 volts and the motor speed is halved.

Using a classic Arduino UNO the motors move at full capacity, as the Arduino UNO supplies 0 to 5 volts in its digital pins.

How can I increase the volts from 0 - 3.3 to 0 - 5? P.S. I need all the values ​​between 0 and 5 volts (for example 2 volts or 4 volts to get all the motor speeds.

2

This can be accomplished with an operational amplifier. You want a non inverting amplifier. You can adjust the circuit gain by changing resistors.

3

I tried to using it, but amplifier didn't amplified the voltage. Now, we're trying to use a step-up MT3608.

4

Post a schematic of the amplifier circuit you built. Show all connections. If it did not amplify it is not a good op amp or is wired incorrectly.

5

IMG_20220201_104111
IMG_20220201_1041111920×471 58.1 KB

6

The circuit you show for the amplifier is for a plus and minus power supply. Your reference should be VCC/2, not ground. This can be achieved with two resistors and a capacitor to stabilize it. look up "non inverting amp single supply amplifier" there is a lot of information available.

7

You should not power a motor from arduino pin

8

We discovered that the external alimentation was not giving the right tension to our motor driver, thank's to all for your's ideas.

9

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