DIY Wireless Power Meter | 100VDC 100A
Introduction: DIY Wireless Power Meter | 100VDC 100A
Hey! everyone, My name is Steve
Today I’m gonna show how I build this Power Meter Using ESP8266 & INA226 Current Sensor
The Screen seems to fluctuate it’s just due to the camera in real it’s normal
I’ve built the Codes with ESPHome
These can measure current 1mA to 100Amp and Voltage up to 100VDC, and it’s very precise
And yes it can also measure negative current
And I also have added DHT11 So it can measure Temperature & Humidity
It can also be integrated with your Home Assistant and you can see it wirelessly I’ll mostly use this for capacity testing Lifepo4 Battery
This is the First Version I’ve made there are so many things to improve
Click Here to See The Video
Let's Start
Step 1: Features
Input Power
* 5V DC
Measurement
* 0-100VDC
* 0-100A
Built-in Features
* 0.96" Oled
* OTA Update
* Temperature & Humidity Read
* Wireless
* Extra Ports for Future Expandability
Step 2: Precesion Samples
I used my lab bench power supply to test it and it seems very accurate there are very few errors and you can always calibrate it
Step 3: Thing I've Used
Aliexpress
* Wemos D1 Mini - http://bit.ly/37x3Jie
* INA226 Current Sensor - http://bit.ly/3k2OUZO
* DHT11 - http://bit.ly/3k2OUZO
* 0.96 Inch Oled Display - http://bit.ly/3k2OUZO
* SMD Resistance - http://bit.ly/3k2OUZO
* SMD Capacitors - http://bit.ly/3k2OUZO
* Female Headers - http://bit.ly/3k2OUZO
* 100A Shunt - http://bit.ly/3k2OUZO
* Load Tester - http://bit.ly/3k2OUZO
* TS100 Soldering Iron - http://bit.ly/3k2OUZO
Amazon
* Wemos D1 Mini - http://bit.ly/3k2OUZO
* INA226 Current Sensor - http://bit.ly/3k2OUZO
* DHT11 - http://bit.ly/3k2OUZO
* 0.96 Inch Oled Display - http://bit.ly/3k2OUZO
* SMD Resistance - http://bit.ly/3k2OUZO
* SMD Capacitors - http://bit.ly/3k2OUZO
* Female Headers - http://bit.ly/3k2OUZO
* 100A Shunt - http://bit.ly/3k2OUZO
* Load Tester - http://bit.ly/3k2OUZO
* TS100 Soldering Iron - http://bit.ly/3k2OUZO
Step 4: Making PCB
I generally try to make everything professionally so I use JLCPCB to make my dream come true.
Talking about JLCPCB it's the world largest PCB manufacturing company and provide very fantastic results
You can see the above image as a reference
Now, JLCPCB are offering
* $2 for 2Layer, 5pcs
* $5 for 4Layer, 5pcs
Gerber & Schmitics - Download
Step 5: Why ESPHome
I use Home Assistant to run ESPHOME it's very easy to work with and gives wireless capabilities
It uses YAML and the coding is very user friendly
Step 6: SMD
I generally use SMD Resistance and Capacitors Book it's easy to work with everything is well sorted
Step 7: After Gathering All the Parts
Started Soldering 4 Resistance and 1 Capacitor. 382