USB relay device?

Question

Do it yourself

There is a task to briefly close paired contacts and manage this business from a computer.
It is desirable that there be as many such contacts as possible. Let's say >32 pairs.
Because in electronics, I'm not very knowledgeable, I ask for hints in which direction to dig.

Answer 1

Here is a 16-channel relay block, 850r.
Here is an 8-channel solid state (does not click) 700r.
With this thing, all of the above will work via USB for 400 rubles.
But something tells me that it is unlikely that you need so many relays, unless of course you are going to switch contacts inside Soviet military transmitters, heavy agricultural. machinery, or CNC machines the size of a house. Describe the question in more detail, what currents, what switching circuit (what how to switch, the circuit of the entire device is not needed). Usually, tasks with such a number of contacts are solved on transistor switches, with relatively high currents they use field ones, just a relay that is both loud and big and eats energy like a horse.

Answer 2

www.masterkit.ru/main/set.php?code_id=30050

Answer 3

So, in principle, I would solder a key switch on transistors, for example, a description of the principle of its operation. But there are also ready-made batteries in DIP cases (with long legs for mounting into the board holes) and SMD (with short legs for mounting on the board surface), but I think if you avoid soldering, then you need to take something in the DIP version and buy a loaf . Correct me if I'm wrong, but something like the ADG441BR or something along with the EZ-USB should do the trick.