Hello,
I am trying to connect voltage divider to ADC,
The resulting circuit is similar to
But
R1,R2 - 870Kom (I need low power consumption, because of battery powered device).
C1 - 100nF. ( As in ESP recommendations)
As a result, R2 + C1 gives RC oscillator, which oscillate at 1.8Hz
So the resulting voltage measurements have dispersion around 0.4 Volt.
When I log to console raw measurments in cycle, I can see real sinus.
How to correctly connect voltage divider to ESP without such effects?
how to connect ADC voltage divider?
Return to “General Discussion”
Jump to
- English Forum
- Explore
- News
- General Discussion
- FAQ
- Documentation
- Documentation
- Sample Code
- Discussion Forum
- Hardware
- ESP-IDF
- ESP-BOX
- ESP-ADF
- ESP-MDF
- ESP-WHO
- ESP-SkaiNet
- ESP32 Arduino
- IDEs for ESP-IDF
- ESP-AT
- ESP IoT Solution
- ESP RainMaker
- Rust
- ESP8266
- Report Bugs
- Showcase
- Chinese Forum 中文社区
- 活动区
- 乐鑫活动专区
- 讨论区
- 全国大学生物联网设计竞赛乐鑫答疑专区
- ESP-IDF 中文讨论版
- 《ESP32-C3 物联网工程开发实战》书籍讨论版
- 中文文档讨论版
- ESP-AT 中文讨论版
- ESP-BOX 中文讨论版
- ESP IoT Solution 中文讨论版
- ESP-ADF 中文讨论版
- ESP Mesh 中文讨论版
- ESP Cloud 中文讨论版
- ESP-WHO 中文讨论版
- ESP-SkaiNet 中文讨论版
- ESP 生产支持讨论版
- 硬件问题讨论
- 项目展示
Who is online
Users browsing this forum: No registered users and 172 guests
- All times are UTC
- Top
- Delete cookies
About Us
Espressif Systems is a fabless semiconductor company providing cutting-edge low power WiFi SoCs and wireless solutions for wireless communications and Internet of Things applications. ESP8266EX and ESP32 are some of our products.