太白金星

Printer sharing device (2 in and 1 out)

Overview

The circuit board is powered by two USB-Bs, and the 9013 triode drives two relays to switch the data transmission circuit to complete the switching of communication equipment.

1.S9013 can be replaced with other NPN tubes, such as 8050.

2. The two 0-ohm resistors in the 0402 package of R11 and R12 can be short-circuited directly. Note that you only need to short-circuit R12, do not short-circuit R11.

3. If R11 and R12 are not short-circuited, USB1 cannot be used. If R11 and R12 are both short-circuited, USB2 cannot be used.

4. In order to use resistors of different resistances, the resistors are all 120 ohms, which is a bit inappropriate here, but it does not affect the use.

5.R9 and R10 are the current limiting resistors of the two LEDs and can be modified by yourself.

6. The 3D printed shell of the PCB will be updated in the future (after graduation/face covering).

7. Only need to short-circuit R12, do not short-circuit R11.

8. Only need to short-circuit R12, do not short-circuit R11.

9. All bosses are welcome to communicate and make suggestions.

Design Files

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Update:2025-06-20 03:16:24

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