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Author Topic: pulling my hair out!!! uln2803apg  (Read 1505 times)
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I bought 10 of these damn toshiba darlington arrays and i can't get a single 1 to behave smiley-sad(((

 http://m.flickr.com/lightbox?id=8018632559
http://m.flickr.com/lightbox?id=8018636710

to simplify things

it's running off a 5v rail (usb/arduino)

basically.. without gnd it lights dimly with gnd nothing!!! i tried 5ics it's like they all came fried i'm a little worried trying the other 5 incase i'm blowing them somehow?!?

thanks..
« Last Edit: September 24, 2012, 01:08:30 am by cjdelphi » Logged

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I didn't understand any of that. What "toshiba darlington arrays"? Part number? Link to data sheet?

Quote
it's running off a 5v rail (usb/arduino)

What circuit?

What code? Or isn't that relevant?
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You need to connect PIN10 to VCC.
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Nick - re read the title :p

the pictures are of the circuit.. all im doing is making sure these ics work

Ok ill try that lavan cheers
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Yayyyy pin 10 solved it thanks smiley
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You are welcome :-)
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just to add, I ran into an opposite problem when I connected this to an 8 channel relay board, which already comes with its own diode circuit connected to supply rail. In my case, I connected pin 10 to Vcc and was getting unpredictable results, until I disconnected pin 10.
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