I have a machine which have 2 BLDC motors and I need to control it. I'm planning to control the motors by tapping the membrane keypad which already exists in the machine using microcontroller signal. I found the 2 pins that connected to certain button and when I keep pressing the button and checking the continuity, multimeter didn't give a beep sound. When I checked the voltage difference in each pin when I pressed the membrane button one was giving 14V while other pin having 4V. But these voltages didn't fluctuate when I pressed the button, but the button function keeps working which means the button membrane should be working fine. Is there a way to mimic the button press using a microcontroller or I need to know an alternative way to control 2 BLDC motors which are 12V and 15A rated current.

 

What is the type of controller you have?
What are the machine details?
Is this an OEM or a DIY project?
Are you actually switching motor power with the buttons?
IMO, most membrane PB's have no place on a motor controlled machine.

 

What is the type of controller you have?
What are the machine details?
Is this an OEM or a DIY project?
Are you actually switching motor power with the buttons?
IMO, most membrane PB's have no place on a motor controlled machine.

I'm doing this for my university project, and this is an existing product on the market. I'm using Nucleo F401RE and this is a bowling machine for cricket.