uln2803a amps?
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- gradient
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- Joined: Mon Sep 28, 2009 12:17 am
uln2803a amps?
Any idea how many amps I can take through the uln2803a? I can't figure it out exactly. I have a few brushless motors I want to turn on and off for (delay 60 or 100) or so, and since they are connected to something heavy they pull about 1 amp and sometimes more. Do you think this is too much? The motor shield seems to only do 1.2amps max. Any suggestions?
- philba
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Re: uln2803a amps?
when in doubt, read the datasheet. http://www.st.com/internet/com/TECHNICA ... 000179.pdf
In this case you are looking for continuous collector current - Ic, 500 mA
In this case you are looking for continuous collector current - Ic, 500 mA
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- Joined: Mon Sep 28, 2009 12:17 am
Re: uln2803a amps?
Thanks for your reply. I tried reading the data sheet but I'm fairly new to all of this and don't really know what most of it means.
With small pulses of around 700-1amp do you think it would be ok? Not a continuous current. It hasn't gotten hot or anything after many hours operation.
With small pulses of around 700-1amp do you think it would be ok? Not a continuous current. It hasn't gotten hot or anything after many hours operation.
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- Posts: 81
- Joined: Mon Sep 28, 2009 12:17 am
Re: uln2803a amps?
Oh I just saw that I could parallel the outputs for higher current. Please excuse the novice question here, but would that just mean putting a few of the outputs going to the same wire, then having the wire extend to the motor? Also, would I have to change the code to turn on the outputs at the same time or something? Any input would help a great deal, thanks a lot.
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Re: uln2803a amps?
sorry just realized I could just buy a regulated 500Ma supply at the right voltage, instead of this massive 5 amp supply!
Please be positive and constructive with your questions and comments.