This is a simple analog multiplexer I put together.
It allows me to connect multiple analog components, like sensors, to a single input on a microcontroller.
I built this project mainly as a learning exercise to get more comfortable with how multiplexers work in real-life circuits.
Here is the list of components used in this project.
Where possible, I have added links to datasheets for reference.
| ID | Component Name | Description | Quantity |
|---|---|---|---|
| 1 | 2-pin 2.54mm Female Header | Single row, 2.54 mm pitch female PCB header | 1 |
| 2 | 8-pin 2.54mm Female Header | Single row, 2.54 mm pitch female PCB header | 1 |
| 3 | 4-pin 2.54mm Female Header | Single row, 2.54 mm pitch female PCB header | 1 |
| 4 | CD74HC4052E | 2-channel 4:1 analog multiplexer IC | 1 |
| 5 | DW127R-22-06-34 | 6-pin wire-to-board connector | 1 |
Below are some pictures of the multiplexer in action:
1. Full View of the PCB
2. Close-up of the Headers
3. Multiplexer Wiring
- The CD74HC4052E acts as a 2-channel analog multiplexer.
- The microcontroller selects which sensor to read vi