Hey Guys did a search did not get any results. Has anyone have a recommendation of a current sensor for monitoring power consumption on an external device ( 115 volt ) with the spark core? I am looking for a product recommendation. Thanks!

Well, these topics popped up after I searched for “current”: [image] Current sensor ACS712 Iam using this sensor http://hacktronics.co.in/home/248-acs712-5a-range-current-sensor-module.html With no load or with 120mA load values from analogRead are about 3720± Is ACS712 capable to sens…

Read both ( unlike some new folks I do use the search ) first one is not very reassuring to try that particular device and the second one is for measuring DC and I am looking to measure line voltage which is 115volts AC Thanks though.

@Herner have you seen this post: [image] Open Energy Monitor Port OK here goes. Here is a port of the monitoring part of the Open Energy Monitor - very little needed to be changed. I had an Arduino/Raspberry Pi energy monitor running for a couple of years but the Spark frees me from a l…

There are a lot of ways to do this depending on what your goals are. The old (2009) Tweet-A-Watt from Lady Ada is good reading and Newegg has the Kill-A-Watts for around US$20. You are going to be hard-pressed to engineer your own solution for that price [image] Tweet-a-Watt kits now ava…

@peekay123 great project I read it months ago but thanks for reminding me about it. I just re-read it and it will likely help me with some items on my list to knock off. @bko You are right I am being a bit ambiguous in my description my apologies. I have a variable speed external device where I wan…

@peekay123 did a bunch more reading and since my voltage will almost always be a constant your link may be what I need afterall. http://openenergymonitor.org/emon/buildingblocks/how-to-build-an-arduino-energy-monitor-measuring-current-only So long as EMON has been ported to spark that should do me…

I dug a bit this morning and this is the current sensor that I used in the past: http://www.crmagnetics.com/Products/CR2550-P13.aspx You can replace the LED with your own opto-isolator or use it directly. They have other solutions but this was the cheapest way to go for me in the past.

@Herner I have a Spark monitoring my house power consumption and Solar generation output and use a similar type of AC current clamp to the one typically used by the open energy monitor. They seem to work pretty well feeding the analog inputs of the Spark with a couple of analog components to shift …

Thanks @nickgb I also prefer the split core CT’s. Means you can put them on without messing with line voltage. For me size is not a big deal on THAT side of it :slight_smile: Thanks for suggesting one to try. Are you willing to share your sketch and how you put it together? I have never used one be…

Hi @Herner . This is the main code, it use it used to be in an Arduino and was my first Spark project. I can’t claim to be original as most of this is inspired by the open energy monitor. There are two current probes on A1 and A2 and a voltage reference from a 6 volt transformer (reduced down) on …

Current Transducer for Spark

Hardware

peekay123 January 9, 2015, 10:25pm 4

@Herner have you seen this post:

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Current Transducer for Spark

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