SkyRocketeer
New Member
High power Current sensing device
Is there a way to monitor the current through a motor without having a negative effect on the current?
For my leccy window project, I'd like to know if the motor has been stalled mid-travel (kiddies head or something). Some form of position sensing device may work, but as I'm dealing with an electric window mech as a complete and sealed device, it's difficult to add one to it, plus the inside of a car door is a dirty place and I can't see an opto-based sensor living that long.
This leaves me with the option to monitor the current, I'm reluctant to simply stuff a resistor in series with the motor and measure the voltage from it, as a) the resistor would have to take a fairly hefty current and b) it'd be sapping power from the motor.
Is there another trick I can use?
Is there a way to monitor the current through a motor without having a negative effect on the current?
For my leccy window project, I'd like to know if the motor has been stalled mid-travel (kiddies head or something). Some form of position sensing device may work, but as I'm dealing with an electric window mech as a complete and sealed device, it's difficult to add one to it, plus the inside of a car door is a dirty place and I can't see an opto-based sensor living that long.
This leaves me with the option to monitor the current, I'm reluctant to simply stuff a resistor in series with the motor and measure the voltage from it, as a) the resistor would have to take a fairly hefty current and b) it'd be sapping power from the motor.
Is there another trick I can use?
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