Hawaslsh
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Hello all,
I am trying to find a solution to stop my measurement setup from drawing power if the ucontroller losses power, or the computer controlling the setup reboots. Putting aside a lot of the details: I have an arduino based ucontroller controlling a stepper motor control board. The arduino is powered by the computer's USB but the motor control board has its own source (in order to supply enough current). Under normal operation, the motor control board has an enable input, which when pulled high stops motor control board from sourcing current. However, if the enable signal isn't present, the motor control board will draw its full load, 1A in this case. Is there some clever protection circuit i could make to prevent this from happening when windows decides to reboot my compter?
My first inclination was a series pass transistor between the power supply and motor control board board. the transistor gate would be controlled by the arduino's 5V output. However, if the computer reboots, the arduino board will provide the 5V but no signal to the enable pin, causing current to flow again.
Thanks in advance,
Sami
I am trying to find a solution to stop my measurement setup from drawing power if the ucontroller losses power, or the computer controlling the setup reboots. Putting aside a lot of the details: I have an arduino based ucontroller controlling a stepper motor control board. The arduino is powered by the computer's USB but the motor control board has its own source (in order to supply enough current). Under normal operation, the motor control board has an enable input, which when pulled high stops motor control board from sourcing current. However, if the enable signal isn't present, the motor control board will draw its full load, 1A in this case. Is there some clever protection circuit i could make to prevent this from happening when windows decides to reboot my compter?
My first inclination was a series pass transistor between the power supply and motor control board board. the transistor gate would be controlled by the arduino's 5V output. However, if the computer reboots, the arduino board will provide the 5V but no signal to the enable pin, causing current to flow again.
Thanks in advance,
Sami