unbwogable
New Member
Newbie question, haven't got much electronic design experience. I'm redesigning a circuit for a friend, and he's got 52 NPN transistors on this thing .
I'm wondering if I can swap them for several ULN2803 ICs. I know it's feasable, but he's got each transistor switching a positive voltage on and off. All the datasheets I see for the 2803 show it switching the negative side. Is there any other chip that can do this for me, or can I switch the positive and negative pins on the 2803?
Or does anyone have any other suggestions?
Basically, this is what he's got:
**broken link removed**
This is what he wants:
**broken link removed**
Will that last circuit actually work? All the data he's got is saying that the output on the right side of the pins will be a (-) connection
I'm wondering if I can swap them for several ULN2803 ICs. I know it's feasable, but he's got each transistor switching a positive voltage on and off. All the datasheets I see for the 2803 show it switching the negative side. Is there any other chip that can do this for me, or can I switch the positive and negative pins on the 2803?
Or does anyone have any other suggestions?
Basically, this is what he's got:
**broken link removed**
This is what he wants:
**broken link removed**
Will that last circuit actually work? All the data he's got is saying that the output on the right side of the pins will be a (-) connection
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