Involvement:Expert (understands the inner workings) - Ownership:1 week to 1 month
This is a very suitable for DIY unipolar geared 5V 4-Phase 5-Wire stepper motor controlled by ULN2003 Driver. One of the most significant advantages of this stepper motor is its ability to be accurately controlled in an open loop system.
the quality of soldering of the driver is like a child-made.
The Speed Variation Ratio is 1/64 and the stride Angle is (5.625 degree /64) .
The ULN2003A can pass up to 500 mA per channel and has an internal voltage drop of about 1V when on. It also contains internal clamp diodes to dissipate voltage spikes when driving inductive loads.
To control the stepper, apply voltage to each of the coils in a specific sequence.
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