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New ACSP3 current/voltage sensor with dual interface

Posted by Nick Arsov on June 17, 2015 at 6:30am

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Hi guys,

I and Phil Kocmoud are proud to announce the new ACSP3 - current/voltage sensor with analog and I2C interface.

Here are some device features:

  • Vin max = 42VDC ( 10S )
  • Ishunt current = 90A
  • Vout = 5.4V
  • Ioutmax = 2.25A with 3A burst
  • Ultra low noise/ripple <10-12mV
  • Analog + I2C interface
  • Dimensions - 30x30mm

The new current/voltage sensor uses INA169 for analog current readings and dual I2C ADC for digital readings. The ultra low noise DC-DC Buck ( LT8609 ) makes the device one of the most silent. The board comes with 2x4 0.1" presoldered header.

A simple Arduino code attached showing an example of I2C voltage data readings.

Now we're performing the usual current/voltage stress tests and hope the device will be ready for the market very soon.

Some more pictures attached.

Best regards

Nick Arsov

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Comments

  • Nick Arsov June 17, 2015 at 11:47am

    ...sorry, I did mean ....150A current sensor with triple low noise BEC....

  • Nick Arsov June 17, 2015 at 11:30am

    Hi Artem,

    Yes, I can, but not at that price. For such price you have to ask the Chinese guys :-)

    Btw, such triple 150A BEC has been already designed by Airbotservices.com and will be announced very soon.

    Airbot Services Home page products & services description | Drones
  • Artem June 17, 2015 at 11:23am

    Nick, can you make one rated at least to 180A  with triple BECs: 5.4v for FC, ans two adjustable 5-12v (as silent as possible). Preferrably in 45x45 form factor with a ESC power distribution. This would be a great option for larger hexas and octas as those spike 130-140 amps, even though they spent 95% of flight time in 30-50amp zone. Price range about  ~$45.

  • Nick Arsov June 17, 2015 at 11:20am

    Hi Marc,

    The ACSP3 uses the same current sensor as the 3DR PowerBrick, then the signal is converted from an ADC into I2C. The software add-on should be a must. I'm not a software guy, but with all my limited skills in Arduino code, I read the ACSP3 I2C within a few hours. So I think this add-on code will be a piece of cake for the skilled software guys.

  • Marc Dornan June 17, 2015 at 11:12am

    I have a standing order with Phillip to get one of these as soon as they are available (just staking my claim at the head of the queue). So will firmware changes be needed to pass current and voltage readings to the Mini Hawk (that is what I call your PX4 variant)? I have only ever used analog inputs. And does this mean we do not have to calibrate those non-linear 3DR-style power modules. This looks great.

  • Nick Arsov June 17, 2015 at 10:27am

    Hi Marc,

    No, it has DUAL interface - analog ( 0-3.3V ) + digital ( I2C ). So, one can use either of them or both :-)

  • Marc Dornan June 17, 2015 at 10:21am

    So Nick, this will be sending I2C readings to the FC instead of a scaled 0-5V (or 0-3.3V) analog reading?

  • Tsahi Mizrahi June 17, 2015 at 8:37am

    This is great,

  • UAS_Pilot June 17, 2015 at 7:07am

    Looks good. 

    Thanks for sharing.

This reply was deleted.