#20 H2O2 - Current HE V1.0.1 - A budget Alternitive to a $70 or more Clamp on Current Meter Part 1

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Update: Original Release
Part 1 of 2
The Current HE is a 0 to 100 Amp Current sensor That has an Accuracy of + - 1% at Full scale. I have observed. An accuracy of .1 amp at low current readings. I am introducing this sensor to the public and will be perfecting the Electronics to support this sensor for use in measuring HHO Cell current. In an effort to increase the communities ability to accurately measure current at a low cost to the end user.

Part 2 can be viewed here. http://www.youtube.com/watch?v=eC_htixjr2I

By the way, I totally support Open Office Org. Their Writer and Calc are way better then MS Word and Excel. And it supports my belief in Open Source. Great work OpenOffice.org

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[ZeroFossilFuel]

Okay, ~$30 for a current sensor that still needs an op amp with adjustable gain and power supply.

PMS about $1.00 in hardware. Very linear.

How linear is the HE?

[H2O2FromH20]

The Linearity of the L08P100D15 from Mouser is less then or equal to +-1% at 100 Amps.

I am personally experiencing a shift in current as the temperature of my PMS increases from Self heating. It happens between 20 and 30 amps. I can feel the shunt heat up. I will preform further test.

[H2O2FromH20]

I totally agree, It would be a great feature, I have plans to add the Amplifier and I am relaying out the board Shortly to accommodate the Lower voltage regulator. The only problem with the Scale amplifier is that a Scale of 0 to 1 volt out has a poor resolution .1 amp steps, the other option is 0 to 10 volt scale but the operator will have to move the decimal over 1 place 20 amps would read 2.000 volts and the resolution is excellent. What option is better?

[muhdsyafiq88]

Nice one..interested to make one...

where can i get the circuit for it??

[eloid777]

where can i get the schematics for it?

[ZeroFossilFuel]

You're right. Copper does have a positive resistance temperature coefficient. It's still going to be within 5% tolerance once calibrated cold, certainly good enough for quick and dirty high amperage measurements.

[davidrrrd]

prity good, now it should hook up to a bord with the power factor calibration done on the bord so the amps read on a digitil display correctly for the "layman"