I would like to drive a pneumatic relay from a TTL GPIO source, the TTL may be 0-3.3v or 0-5v I would like supply and cut 12v to the relay to control the air. I have a concept of what i'm trying to do in the circuit but my electronic design skills have not been used i a long time. I'm happy for other suggestions e.g. MOSFET etc. I would like use common parts available from Jaycar to solder on to veroboard
The datasheet for the relay says 16W (27VA) but I think its actually much less because I have driven 2 relays with a single 15W power supply with no problems.
Can someone provide me with a layout that can do such a thing and can work even if the load is much smaller e.g. 0.1W for example.