ESP8266 Community Forum

- Tue Feb 07, 2017 3:43 am #62207 I've seen a lot of these in AC version, but I would like one for DC to measure below 1A. Where can I find the sensor and external clamp.

Thanks in advance

- Tue Feb 07, 2017 5:44 am #62214 You can use a dedicated IC for that. You can see a example design here:
SmartMonv2.7Ex - Power monitor :
Part1 - General view - Youtube video : General view
Part2 - Real Time Clock driver example - Youtube video : ESP8266 RTC Driver example
Part3 - Power Monitor software example
Part4 - Real World example with Thinkspeak data upload

ESP8266 MPDMv4 AC MAINS Dimmer Home: http://esp8266-projects.com/2016/04/mpdmv4-mains-dimmerswitch-html/
Available on Tindie: https://www.tindie.com/products/nEXT_EVO1/universal-ac-mains-dimmer-mpdmv41/

- Tue Feb 07, 2017 12:45 pm #62228 AC clamp current sensors are simple. But for DC it is more difficult. What you need to search for is Hall Effect Current Sensor Transducer.

Use the following as a starting point. http://www.scienceshareware.com/how-to- ... clamp-.htm

- Wed Feb 08, 2017 6:23 am #62259 Thank, a little more complex that I was hoping. I searched for split core hall effect dc current sensor and found a good list of available options here, most of them require a 12V power source.

http://www.cy-sensors.com/CYHCS-OL-RW1.htm

Ideally looking for something that can do non-invasive DC current (3.0v-12v) 0-10A without having to purchase $100+ meter.