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Digital thermometer for exotic plants

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Comfortable temperature for growing lemon fluctuates around 18-22 degrees. So that the plant develops well, I put together a digital thermometer for the soil. The sensor of the thermometer is immersed in the soil for three four centimeters. The thermometer runs on two batteries a month.

To recharge, I took the charging module, it can be charged either from telephone charging or from a charging station.

Now I can see what soil temperature around the clock.

It remains to find a suitable box for packing these parts.
Thank you all for your attention.
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9 comments
+1
Reply To quote A complaint
The temperature of the soil corresponds to the temperature of the air at home. ;)
0
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I give the idea how to recharge the batteries less often, and when using the correct device, the operating time will be limited only by the self-discharge time of the batteries.
It is necessary to put a button in the open circuit. And that’s it! I hope you don’t stare at him all day. ;)
To see the readings of the device, you still need to come closer to it, the hand will not come off, press the button. Then you can properly organize the power: use one battery, and connect a converter that increases up to 5 V to its output through this button.
By the way, the resistance of the temperature sensor is 10 kOhm for the device I brought in, so that you can safely extend the connecting line (necessarily - twisted pair, even the simplest), putting the indicator in a convenient place. You can take readings from several geographically dispersed sensors in one place.
0
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Quote: Coudeyar
I have the same thing, but batteries are not needed. I have a war with them.

Dogmatism never brings to good.
AG13 costs 10 rubles, a pair is enough for two years.
Batteries, depending on the quality, cost several hundred rubles, you need to remember to charge them every 2 months for your purposes.
Your device itself is 4 times more expensive.
Snot removed in a box, which takes in the hundreds of times greater volume than [leech = https:? //imdmyself.com/engine/go.php url = aHR0cHM6Ly9ydS5hbGlleHByZXNzLmNvbS9pdGVtL25ldy1hcnJpdmUtTENELURpc3BsYXktVGhlcm1vbWV0ZXItbWV0ZXItUHJvYmUtVGVtcGVyYXR1cmUtdGVzdGVyLTJtLUZvci1BcXVhcml1bS1GcmVlemVyLzMyNjQxOTE0MjQ5Lmh0bWw% 2Fc3BtPTIxMTQuMTAwMTAyMDguMTAwMDAyMy4yLnpucWdxTA% 3D% 3D] priborchik [/ leech].

Where is the point?
0
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Tiny! )))
+1
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"."
What did you collect?
"."
And then he looked at two in the morning and went to bed calmly ?!
Author 0
Reply To quote A complaint
Quote: Ivan_Pokhmelev
. snot all over the windowsill.
Author 0
Reply To quote A complaint
Quote: Ivan_Pokhmelev
It is much more reasonable to apply something like this: it is much cheaper, but for years it has been working on two AG13 (LR44)!

I have the same thing, but batteries are not needed. I have a war with them.
Author +2
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Quote: Ivan_Pokhmelev
3. snot all over the windowsill.
0
Reply To quote A complaint
The correct name is "How to stick a temperature sensor into the ground."
Extremely unsuccessful solution:
1. the device is beautiful, but with high consumption,
2. the power was selected incorrectly (the device is designed for power supply from 5 V to 25 V), and, therefore, its metrological characteristics are not guaranteed,
3. snot all over the windowsill.
It is much more reasonable to apply: much cheaper, but for years it has been working on two AG13 (LR44)!

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