ULN2003

356

03:48:23

The ULN2003 is a very versatile driver chip. It's guts contain a high voltage/high current darlington transistor array. Various different loads could be driven with this chip. A common situation is microcontrollers that need to drive relays. This can very conveniently done through the ULN2003.

DATASHEET:

https://www.google.nl/url?sa=t&source=web&rct=j&url=http://www.ti.com/lit/ds/symlink/uln2003a.pdf&ved=0ahUKEwjShojR7MXKAhUr8XIKHWm_BjQQFggeMAA&usg=AFQjCNHUdv8pRaS3Y-KFFvAIM8_JaWmeew&sig2=zABVSgwKczarZLUY6gh4vQ

published 10 years ago

billoute720

10 years ago

What is the function or the 3 diodes ? When they are disconnected, circuit seems to run properly..

nikisalli

10 years ago

Ithink the're like a protection when you're using motors or when you give too much voltage on the base

kaivanveldhoven

10 years ago

The diodes are free-wheeling diodes. They're there to make the ULN2003 be able to drive inductive loads and supress the kickback voltage.

billoute720

10 years ago

Ok thanks

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