Electronics > Beginners

Why are Darlington transistors used to drive the 28BYJ-48

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Sudo_apt-get_install_yum:
Hi everyone!

So I’ve been playing around with some cheap Chinese stepper motors (28BYJ-48) and I have no idea why they use a ULN2003 "stepper motor driver". It’s just a Darlington array.
Why not used mosfets?

Could someone shine a light on this?

capt bullshot:
Because the ULN2003 is old, dead cheap and has free wheeling diodes built-in.

Ysjoelfir:

--- Quote from: capt bullshot on July 12, 2019, 10:25:14 am ---Because the ULN2003 is old, dead cheap and has free wheeling diodes built-in.


--- End quote ---
In addition to that, for those steppers even the faked, even more cheaper ULNxxxx knockoffs are absolutely fine.

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