https://github.com/berrak/wled-dc-sensor-board
Fast-changing Neopixel pixel currents of the WLED DC sensor are a perfect application example.
https://github.com/berrak/wled-dc-sensor-board
amperemeter current-measurement current-sensor esp32 esp32-arduino esp8266 esp8266-arduino measurements shunt wled
Last synced: 5 months ago
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Fast-changing Neopixel pixel currents of the WLED DC sensor are a perfect application example.
- Host: GitHub
- URL: https://github.com/berrak/wled-dc-sensor-board
- Owner: berrak
- License: other
- Created: 2022-10-02T16:12:41.000Z (over 3 years ago)
- Default Branch: master
- Last Pushed: 2023-01-11T11:47:35.000Z (over 3 years ago)
- Last Synced: 2024-01-27T07:40:09.904Z (over 2 years ago)
- Topics: amperemeter, current-measurement, current-sensor, esp32, esp32-arduino, esp8266, esp8266-arduino, measurements, shunt, wled
- Homepage:
- Size: 662 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE.md
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README
[](https://github.com/berrak/WLED-DC-Sensor-Board/releases/latest)
[](https://github.com/berrak/WLED-DC-Sensor-Board/releases/latest)
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# The WLED-DC-Sensor-Board
## WLED Neopixel projects
The `electrical current shunt board` combined with an ESP8266 D1-mini microcontroller and the Arduino library [SensorWLED](https://github.com/berrak/SensorWLED) make it easy to measure up to 10 Ampere with reasonable accuracy.
Tracking fast-changing Neopixel pixel currents with the WLED DC sensor is a perfect application example. That was the specific design objective.
Unfortunately, the varying current level is often only roughly estimated in [WLED projects](https://kno.wled.ge).
The female header breaks out I2C-signals, VCC (3.3V), and GND for a small OLED display. Alternatively, use a larger SPI-based display or send data with WiFi for remote monitoring.
## Board main features
The Texas Instrument INAx180 low- and high-side voltage output current-sense amplifier has the following main characteristics.
- Common-mode range (V CM ): –0.2 V to +26 V
- Output slew rate: 2 V/μs
- Offset voltage:
±150 μV (maximum) at V CM = 0 V
±500 μV (maximum) at V CM = 12 V
- Accuracy:
±1% gain error (maximum)
1-μV/°C offset drift (maximum)
- Gain: 200V/V
- Quiescent current: 260 μA maximum
The current sense resistor (1.5 mOhm, 1%, 50ppm/C) handles currents up to 10A.
## Items to add
- Wemos/Lolin D1-mini ESP8266 microcontroller. The WLED sensor becomes a shield on top of the controller.
- Female header pins for the microcontroller.
- Display (I2C interface) for current readings.
Measured values are not strictly required to display on an OLED since they are accessible through a web browser. Neither is the usage of an ESP8266. Instead, use the sensor with, for example, ESP32 and wire the I2C signals from the sensor to the microcontroller. Pull-up resistors, e.g., <=3.3 kOhm to VCC on the I2C signals, are recommended.
## Usage
Please, see the documentation for the Arduino library [SensorWLED](https://github.com/berrak/SensorWLED/).
## Specification for the WLED sensor board v1.0
The fabricated two-layer board has the dimensions of 26.0 x 34.2 mm (1.02"x1.35").
| parameter | imperial | metric |
| -----------|-------|------|
| board material | FR4 | FR4 |
| board thickness | 39 mil | 1.0 mm |
| copper layer thickness | 1.4 mil | 35 um |
| board color | purple | purple |
| board text | white | white |
| board weight | 2.82 oz | 80 gram |
## The board is fully assembled and tested
The WLED current sensor board will be available fully assembled when released.
## Purchase the board
Find all my latest designed boards on `Tindie`.
[](https://www.tindie.com/stores/debinix/)
I appreciate your support.
## Credits
`Coming soon` splash image by [starline](https://www.freepik.com/free-vector/abstract-grunge-style-coming-soon-with-black-splatter_9504688.htm#query=coming%20soon&position=4&from_view=keyword).