• Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

How does a A/B printer type data switch work?

Not open for further replies.

vette eaterr

New Member
My question about the data switch is when you switch from A to B does the switch completely switch all conections with A and create new conection with B, or are there still some contact such as common wires still connected?

Thanks in advance


Active Member
Pins 18 - 25 of a printer port are all connected to GND, these are all connected together and not switched...

As for the other pins 1-17, these are switched between outputs
So in position A pins 1-17 from input are switched to pins 1-17 from outputA
And in position B they are connected to outputB
Not open for further replies.

Latest threads

EE World Online Articles