Review on HiLetgo H Bridge Stepper Controller Arduino: Precision Control for Smooth Stepping Action by Will Murphy

Here's a kind of DIY datasheet: http://me.web2.ncut.edu.tw/ezfiles/39/1039/img/617 / L9110_2_CHANNEL_MOTOR_DRIVER .pdfFor more information search l9110 motor drivers. I gave them 10k PWM and they took it but it got really hot when I got out of there. I tried to avoid sound problems and it's better to stay above 20kHz, but it didn't work. Here's a little more on that: 800mA DC. These ICs have built-in output clamp diodes. Each HG7881 (L9110) can control a DC motor via two digital control inputs. One input is used to select the direction of the motor and the other is used to control the speed of the motor. Speed control is via PWM pulse width modulation. Motorists usually have what is called a truth table that determines the effects of their inputs. The truth table for a single chip HG7881 (L9110) is as follows: HG7881 (L9110) Truth TableInput PinIA IB OA IB DescriptionL LLL OffH LHL ForwardL HLH ReverseH HHH Off installed and connected. You can change the direction of rotation of the motor at any time by swapping the wiring. The HG7881 (L9110) dual channel motor driver module uses two motor driver ICs. Each driver IC is designed to drive a motor. So if you have two, this module can drive two motors independently. Each motor channel uses the same truth table as above. Each set of screw terminals is used to connect a motor. Refer to the table below for the pin connector connection. HG7881 (L9110) Motor Driver Module Dual Channel Connector Pin DescriptionB-IA Motor B Input A (IA)B-IB Motor B Input B (IB)GND Ground VCC Operating Voltage 2.5-12VA-IA Motor Input AA (IA)A- IB Motor A Input B (IB) It is recommended to use input 1A to control the speed of each motor and input 1B to control the direction.