Hi!
I am trying to setup the ULN2803A for the first time.
I think i have gotten all the wires setup correct.
The power supply turns on and delivers 12v.
But i cant turn on the current to the parking brake light.
Is it just to: digitalWrite(pinNR, HIGH); for it to start opening the current?
I have added a couple of images to show how i have connected it.
Can't tell for sure but it looks wrong. Check these links out,
http://www.instructables.com/id/Controlling-High-Power-Circuits-with-Arduino-and-D/ (http://www.instructables.com/id/Controlling-High-Power-Circuits-with-Arduino-and-D/)
http://dduino.blogspot.com/2012/03/arduino-uln2803.html (http://dduino.blogspot.com/2012/03/arduino-uln2803.html)
Thanks. I looked at those and i cant see anything wrong with my setup.
Ive tested the multimeter for all connections. Maybe i will try another driver chip.
Must be something i have overlooked...
Tell me what pins you have connected and where they go to and from the ULN2803
Sometimes i feel like such an amateur...
i didnt solder the ULN2803A chip due to "just testing" it turned out it was bad connection to the board.
Now i am watching my parking brake fade in and out.
Honesly... This is the coolest thing ever! Cant wait to get the Korrys up and running!
Sorry Rob for taking your time. I will try to be more "professional" =)
No worries Glad you got it working
ULN2803's are great when you can have the option of switching GND.
In the chance you ever need to switch actual voltages, this chips from Toshiba do the trick...
http://www.digikey.com/product-detail/en/0/TBD62783APG-ND (http://www.digikey.com/product-detail/en/0/TBD62783APG-ND)
Cool!
I think i will use one for each 28v,12v and 5v.
They are extremely cheap. :)
I am glad i found these before starting to mess with n-channel mosfets.
Besy part is to paralelle connect 4pins and boom, 2amps! Thats really nice.
My mcp bulbs draw 2.4 so i have to think of something special for that one. (Cant draw more than 2amp even if connect 8pins. Will have to look that up)
I wonder what the average draw from the boeing backligt is, but i guess not more than 14-16 bulbs a panel. Should be doable.
Looks like a mosfet is recommended when putting larger amount of current through it.
Think i will be using it for the heavier stuff such as backlight.