Hello I have problem - my RaspberryPi 4 does not detect i2C device (i2cdetect - y 1 gives -- in the whole matrix / array). STA led blinks (i haven't found any into about this led i...
JaneYu 2021-02-15 16:53:11 40 Views13 Replies Hello I have problem - my RaspberryPi 4 does not detect i2C device (i2cdetect - y 1 gives -- in the whole matrix / array). STA led blinks (i haven't found any into about this led in documentation)
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JaneYu Can I use two of this boards to control 4 motors?
I need it for an Omniwheel robot
JaneYu Hi,
Sometimes, the connected motor does not follow the set duty ratio and rotates at high speed. The direction of rotation can be specified, but the speed cannot be controlled.
In some cases, restarting the python program resolves the problem.
This also occurs in the provided sample programs.
Is there a solution?
JaneYu HI, Please replace the motor or raspberry pi to confirm which part is causing the problem.
Does it have a 5v regulator that feeds Raspberry Pi with. I'd like to use a 3S 11v li-po battery and and power the raspberry pi with it.
JaneYu Could you please suggest a power source for this driver. Since it uses 7 ~12v, the standard 3.7v lipo that i am using for Pi Zero won't work for it. Will it work with a variable voltage powerbank so that I can use one same powerbank to power my Pi Zero and the motor driver both? I just want to make sure that it will automatically draw higher than 5v from the powerbank.
JaneYu The working voltage of the expansion board is different from that of the zero, it is recommended to use a different mobile power supply, unless your power supply has a different voltage output port
just tried to use:
# Set board controler address, use it carefully, reboot module to make it effective
board.set_addr(0x11)
It doesn't work for me, so it seems the only way is to use some I2C multiplexor, e.g. TCA9548A I2C Multiplexer
JaneYu 
