I have a circuit which uses negative wires to switch 8 light bulbs independently on and off, they all use a common positive. There is nothing i can do to change this part of the circuit, and it all works fine except...
The bulbs are dim because they take 400ma and the output from the circuit above is 20ma.
'What I need is a Darlington Array' I thought, but on looking at all the darlington arrays they seem to be PNP, do any NPN ones exist? Is there a workaround?
Here's one that is perfect appart from the fact that it has a common negative, which is the oposite to what i need.
https://www.chipcatalog.com/TI/ULN2803A.htm
Any help greatly apprieciated.
The bulbs are dim because they take 400ma and the output from the circuit above is 20ma.
'What I need is a Darlington Array' I thought, but on looking at all the darlington arrays they seem to be PNP, do any NPN ones exist? Is there a workaround?
Here's one that is perfect appart from the fact that it has a common negative, which is the oposite to what i need.
https://www.chipcatalog.com/TI/ULN2803A.htm
Any help greatly apprieciated.