Uln2004a

U

unibaza

New Member

• Aug 4, 2007

• #1

i'm using a uln2004a to drive my stepper motor first time. But i've checked the dahasheet of uln2004a and can't see the Vdd pins there. How i feed the entegre with vdd and wht should be the diagram of stepper motor. Should i connect the same Vdd to the motor? And also wht's the ground pin? thnks

 

Nigel Goodwin

Super Moderator

Most Helpful Member

• Aug 4, 2007

• #2

Presumably it's an open-collector (or open-drain) driver?, so you don't have a Vcc/Vdd pin - try reading the datasheet.

 

U

unibaza

New Member

• Aug 4, 2007

• #3

so what should i do with the "com" pin of it and is the 8. pin ground?

 

Nigel Goodwin

Super Moderator

Most Helpful Member

• Aug 4, 2007

• #4

unibaza said:

so what should i do with the "com" pin of it and is the 8. pin ground?

Click to expand...

Read the datasheet, ULN series chips often hav e internal diodes, and have a single pin that connects to the feed to the top of the coils.

 

M

mcs51mc

Member

• Aug 4, 2007

• #5

Nigel was once again right
Read the datasheet!!!

 

Attachments

• ULN2001-2004.pdf

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