Products > SoilWatch 10

SoilWatch Life expectancy

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pinolec:
Hi Jacques,

Please clarify, do you feed 5.85V to the Mega 2650 via USB port?
Please note that USB specify voltage in the range of 4.40 - 5.25V.  So the 5.85V is outside of the standard voltage for USB and would be lethal for SoilWatch 10 sensor (5.5V absolute maximum).

Kind regards,
Piotr

[email protected]:
Hi Piotr,

Sorry , I see that I made a mistake,I meant 5.5V.
I think I will tone it down to 5V and see how it goes.
The second unit has a different power module that gives out a regulated 5V also feeding the arduino via usb that has 2 x Soilwatch probes connected.
The one soilwatch is still working , but the other one failed after 3 months like the other unit supplying 5.5v.

I know when using the usb the regulator is bypassed, so maybe a spike is getting through and the other sensors are more tolerant.
I will tone down the voltage to 5V on this build and see how it goes and for future build go through the regulator just as an extra measure should my powersupply drop the baal and send a spike through.
Kind Regards
Jacques

pinolec:
Hi Jacques,

The 5.5V is too much as well. The 5.5V is the absolute maximum. Your goal should be to keep it within 3.1-5V
You can use 3.3V on the Arduino Mega board to power Soilwatch 10 sensor. Please make sure the remaining sensors you have are feed with specified voltage to avoid premature failure.
I will contact you via email to discuss the options.

Kind regards,
Piotr

[email protected]:
Hi Piotr,

Thanks,I have received your e-mail,but am unable to reply.
The mail keeps bouncing back.

Do you have any alternative mail address,if so can you please mail it to me,so I can give you a proper reply?

Kind Regards
Jacques

pinolec:
I have sent you another message this time from gmail account. Hopefully this time there will be no problem.

Kind regards,
Piotr

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