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This project is a DIY six-channel stereo speaker selector based on STC15W201 MCU. The purpose of this electronic switch is to share a pair of speakers between six stereo audio systems.
To select each speaker channel, we use a couple of 12V DPDT relays. These relays interface to 74HC595 through a ULN2001D, 3-channel Darlington transistor array IC.
- Bill of materials
- Printed circuit board
- Soldering and assembling
- Wiring layouts
- Firmware
- Schematic diagram
- License
All the content of this document is licensed under a Creative Commons Attribution 4.0 International License.