Sorry I misunderstood.
With a current gain in the thousands, a base current of 1ma should give you plenty of sink current to work with.
The darlington in the circuit looks like a great part, but a little overkill for this app don't you think? Also the term "darlington pair" seems redundant.
Glad to hear it is working.
With a current gain in the thousands, a base current of 1ma should give you plenty of sink current to work with.
The darlington in the circuit looks like a great part, but a little overkill for this app don't you think? Also the term "darlington pair" seems redundant.
Glad to hear it is working.