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Welcome to EnviroDIY, a community for do-it-yourself environmental science and monitoring. EnviroDIY is part of WikiWatershed, an initiative of Stroud Water Research Center designed to help people advance knowledge and stewardship of fresh water. 
Community Activity See all activity
Shannon Hicks replied to the topic Why is 12V power on Mayfly V1.1 (rev A) nominally only 11.3V? in the forum Mayfly Data Logger 1 year, 6 months ago
Mayfly v1.0RevA had a Max17250 boost chip that used the following resistors in order to set the output voltage at 12 volts:
R15 = 10k
R19 = 84.5k
R31 = 220k
When it was time to manufacture more boards in 2021, there was a semiconductor shortage that made it impossible to find that particular boot converter, so the design was modified to use a…[Read more]
jpeytonj replied to the topic Why is 12V power on Mayfly V1.1 (rev A) nominally only 11.3V? in the forum Mayfly Data Logger 1 year, 6 months ago
Thank you so much!
So just to be clear, there was no design change in the 12V boost from v1.1 Rev A to v1.1 Rev B, just a correction in the resistor used during manufacture? Were any other aspects of the design changed at this time?
If so, maybe it would be helpful to add some Rev B documentation to the “Changes” list shown on this page: https:/…[Read more]
Shannon Hicks replied to the topic Why is 12V power on Mayfly V1.1 (rev A) nominally only 11.3V? in the forum Mayfly Data Logger 1 year, 6 months ago
In 2021, there was one small production run of the Mayfly v1.1 RevA boards that, due to an error by the manufacturer, used an incorrect resistor value for the 12-volt boost circuit, resulting in a lower output voltage, around 11.3v. This was corrected in the next manufacturing run, along with making a few other changes, which is why the v1.1…[Read more]
jpeytonj started the topic Why is 12V power on Mayfly V1.1 (rev A) nominally only 11.3V? in the forum Mayfly Data Logger 1 year, 6 months ago
Hello there,
I have a question about the 12V power on Mayfly V1.1. Among the changes listed in the rev A design (https://www.envirodiy.org/mayfly/hardware/details-and-specs/) it states that the “12v boost circuit… can now source up to 100mA, although the nominal output voltage is ~11.3v”.
I am curious why the nominal output is 11.3…[Read more]
jpeytonj became a registered member 1 year, 6 months ago
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saeedcs became a registered member 1 year, 7 months ago
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Braedon started the topic Interpreting and adjusting error values in the forum Mayfly Data Logger 1 year, 7 months ago
Hello there, I am working on a lit bit of debugging for some publisher code using ModularSensors. I successfully connect to the server but get a 422 error code which means that though the POST request had the proper syntax, the body could not be processed. I’ve been trying to figure out what it could be, and I think it might have to do with the…[Read more]
Shannon Hicks replied to the topic Connecting Arduino MEGA or NANO with Teros 12 Sensor in the forum Environmental Sensors 1 year, 7 months ago
There’s a section in the User Manual that should have been included in the shipment with your sensor (it’s also downloadable from here: https://metergroup.com/products/teros-12/teros-12-support/) that explains how to use the raw number collected by the sensor to calculate soil moisture content.
aqua replied to the topic Connecting Arduino MEGA or NANO with Teros 12 Sensor in the forum Environmental Sensors 1 year, 7 months ago
@shicks Thank you so much its working perfectly fine now. Also if you could explain to me how to convert the RAW data of the sensor with the units of measurement I want it would be really helpful.
Kurt@UR became a registered member 1 year, 7 months ago
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