Old 06-06-2010, 12:05 AM #1
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Default Using transformers in series for power source?

Hello,
Im trying out a circuit to control a stepper motor through the parallel port. its not working, and my guess is that i dont have enough voltage for the darlington driver.
Currently, im using a DC transformer @ ~13VDC. The Darlington driver (ULN2803a) calls for 30V.

So, thats the problem. Can I use another transformer in series, or would that ruin said transformer?


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Old 06-06-2010, 02:00 AM #2
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Default Re: Using transformers in series for power source?

I would use buffer transistors (mosfet) - transformers are so old school.
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Old 06-06-2010, 03:06 AM #3
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Default Re: Using transformers in series for power source?

If you have another one, sure.
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Old 06-08-2010, 09:41 AM #4
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Default Re: Using transformers in series for power source?

As long as they are in phase, it should be fine.
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Old 06-08-2010, 04:16 PM #5
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Default Re: Using transformers in series for power source?

I have a 4 axis stepper motor controller for sale... pm me if interested.

-Adrian
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Old 06-09-2010, 04:33 AM #6
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Default Re: Using transformers in series for power source?

I have a Schwinn bicycle for sale.. pm me if interested.
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Old 06-09-2010, 04:38 AM #7
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Default Re: Using transformers in series for power source?

Quote:
Originally Posted by space_bar View Post
I have a Schwinn bicycle for sale.. pm me if interested.
Lol?

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Old 06-09-2010, 07:20 AM #8
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Default Re: Using transformers in series for power source?

Idiots...

Quote:
Im trying out a circuit to control a stepper motor
If that doesn't work....

Quote:
I have a 4 axis stepper motor controller for sale... pm me if interested.
DUH.... -Adrian
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Old 06-09-2010, 03:58 PM #9
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Default Re: Using transformers in series for power source?

You can use transformers in series, as long as you keep within the current the smallest one is rated for. Just hook the primaries in paralel, and the secondaries in series. If you get the phase right, you'll get double the voltage. If not, you get around 0 volts and should reverse the leads on one of the secondaries... easy enough
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