Hi, i am trying to drive relays from a parallel port.
I put an optocoupler between the buffer register and the relays
(if double isolation proposes a problem, please tell me)
The problem is I want my LED indicator to indicate whether the coil is activated
which is the exact opposite of what my circuit does.
You can see that I attempted to put the indicator at the emitter of the 2N2222
but the relay wont activate so I guess that's not an option.
Any ideas?
Thanks!!
I put an optocoupler between the buffer register and the relays
(if double isolation proposes a problem, please tell me)
The problem is I want my LED indicator to indicate whether the coil is activated
which is the exact opposite of what my circuit does.
You can see that I attempted to put the indicator at the emitter of the 2N2222
but the relay wont activate so I guess that's not an option.
Any ideas?
Thanks!!