https://github.com/nopnop2002/esp-idf-x9c103

Three-Wire Digitally Controlled Potentiometer driver for ESP-IDF
https://github.com/nopnop2002/esp-idf-x9c103

digital-potentiometer dpot esp-idf esp32 x9c103 x9c104 x9c503 x9x102

Last synced: 3 months ago
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Three-Wire Digitally Controlled Potentiometer driver for ESP-IDF

• Host: GitHub
• URL: https://github.com/nopnop2002/esp-idf-x9c103
• Owner: nopnop2002
• License: mit
• Created: 2022-01-12T00:54:30.000Z (over 3 years ago)
• Default Branch: main
• Last Pushed: 2025-01-09T02:06:00.000Z (5 months ago)
• Last Synced: 2025-02-28T19:53:13.889Z (3 months ago)
• Topics: digital-potentiometer, dpot, esp-idf, esp32, x9c103, x9c104, x9c503, x9x102
• Language: C
• Homepage:
• Size: 15.6 KB
• Stars: 4
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# esp-idf-x9c103

Three-Wire Digitally Controlled Potentiometer driver for ESP-IDF.

ESP32 has two 8-bit DAC (digital to analog converter) channels, connected to GPIO25 (Channel 1) and GPIO26 (Channel 2).   

ESP32S2 has two 8-bit DAC (digital to analog converter) channels, connected to GPIO17 (Channel 1) and GPIO18 (Channel 2).   

However, the maximum voltage is up to VDD.   

If you control a voltage up to 5V, you can use this.   

And ESP32S3/ESP32Cx core does not have a DAC function.   

- X9C102 = 1kOhms   

- X9C103 = 10kOhms   

- X9C503 = 50kOhms   

- X9C104 = 100kOhms   

I ported from [here](https://github.com/lucyamy/LapX9C10X).   

# Installation

```Shell

git clone https://github.com/nopnop2002/esp-idf-x9c103

cd esp-idf-x9c103

idf.py menuconfig

idf.py flash

```

# Configuration   

![config-top](https://user-images.githubusercontent.com/6020549/149045495-e4735ac4-b28f-488e-8768-5fccb94ae3e7.jpg)

![config-x9c103-1](https://user-images.githubusercontent.com/6020549/149045498-888247f2-06dd-42c4-9da0-46f737ee57b5.jpg)

![config-x9c103-2](https://user-images.githubusercontent.com/6020549/149048774-ac062afb-dd17-48fe-b419-24c1838a12be.jpg)

# Wirering

|Circuit|X9C||ESP32|ESP32-S2/S3|ESP32-C2/C3/C6/H2|

|:-:|:-:|:-:|:-:|:-:|:-:|

||INC|--|GPIO33|GPIO38|GPIO3|

||U/D|--|GPIO32|GPIO33|GPIO4|

|High terminals|Vh/Rh|--||||

||Vss|--|GND|GND|GND|

|Wiper terminals|Vw/Rw|--||||

|Low terminals|Vl/Rl|--||||

||CS|--|GPIO5|GPIO34|GPIO5|

||Vcc|--|5V|5V|5V|

__You can change it to any pin using menuconfig.__   

If you connect to Low terminals = Gnd and High terminals = 5V, 0 to 5V is output to Wiper terminals in 99 steps.   

# Typical circuit

![ESP32-x9c103](https://user-images.githubusercontent.com/6020549/205483596-b26952e4-19c1-4990-aa23-13f35d54abf8.jpg)

# API

See [here](https://github.com/lucyamy/LapX9C10X).

# Reference

https://github.com/nopnop2002/esp-idf-mcp41010