Hi,
I've a problem.
I use a pic to switch relay through ULN2003. uln2003 allow current flowing from negative side. I need to switch only one relay allowing current flowing from positive side. I thought to use a PNP transistor to do this.
In my schemathic i've problems: positive relay works good when other negative relays are switched off but when i switch on one of negative relays, positive one stops working.
What is in your opinion the best configuration to do this without problems?
This is my schemathic that doesn't work.
**broken link removed**