How can I make a simple cheap 3 port Switch? I have 30 10-base low speed Ethernet devices and I want to connect them together, how can these devices connects together with simple Bus topology? simplest and cheap way?
closed as too broad by pjc50, Matt Young, JYelton, Chetan Bhargava, Nick Alexeev♦ May 2 '14 at 16:33
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The simplest and cheapest way is to go buy one. The off-the-shelf hardware is so inexpensive these days that there's really no way you're going to create a custom solution that saves either money or effort. Both Amazon and Newegg list several Ethernet switches for less than $20.