The 20mA per pin max. are considered for single pins. If you intend to run all pins high at the same time the current per pin can (will) drop to 8mA per pin
You will have to use transistors to switch the relays.
See this thread
The 20mA per pin max. are considered for single pins. If you intend to run all pins high at the same time the current per pin can (will) drop to 8mA per pin
You will have to use transistors to switch the relays.
See this thread