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--- chip:weatherstation [2018/03/09 21:12] – rlunaro
+++ chip:weatherstation [2018/03/10 20:36] – rlunaro
@@ Line 15: / Line 15: @@
 I need to guess how much power the raspberry pi plus the modem will consume.
 |Device|Power consumption|
-|Raspberry Pi Zero| 120 mA (0.7W) | from ([https://www.jeffgeerling.com/blogs/jeff-geerling/raspberry-pi-zero-power|here])|
+|Raspberry Pi Zero| 120 mA (0.7W) | from ([[https://www.jeffgeerling.com/blogs/jeff-geerling/raspberry-pi-zero-power|here]])|
 |Hsdpa Modem | 120 mA | (estimated) |
+The approximate consumption of this set is 240ma. For powering it, I've think that the [[https://www.adafruit.com/product/1903|PowerBoost 500 Basic - 5V USB Boost @ 500mA from 1.8V+]] will draw
+enough power for it.
+For the batteries, the circuit can have NiMH batteries or lipo batteries. I've think that NiMH batteries are
+cheaper and safer, so I decided to use them. Aproximately 7.200 mah will keep the weather up and running
+for more than 24 hours, which is convenient in case there is a cloudy day. Two
+[[https://www.amazon.es/Odec-Pilas-Recargables-Ni-MH-unidades/dp/B01D9WLJQ4|NiMh C batteries]] will do the
+job.
-Quiero ver si es viable construir una estación meteorológica que cuente con estos requisitos:
+Next, is the cell panel. A tough question. Do it correctly needs measures of solar power in your zone,
+estimations of the productivity of the solar panel based on this and a lot of things. But! I don't
-  - medias de presión, humedad, temperatura y dirección y velocidad del viento
+have the knowledge nor the time for it, so I decide to use this:
-  - lo más económica posible
+[[https://es.aliexpress.com/store/product/5pcs-lot-Solar-Panel-Portable-Mini-6V-1W-Sunpower-DIY-Module-Panel-System-For-Solar-Lamp/1960862_32819874146.html]], joining as many panels as needed. Just an exercise of
-  - solar-powered, que se pueda poner autónomamente en el campo
+trial and error.
-  - que transmita los datos a través de internet
-Para ello he pensado utilizar los siguientes elementos:
-  - Celula solar (posiblemente [[https://www.amazon.es/dp/B007HAZY8Y|esta]] sería adecuada) --> 28 euros
-  - Una bateria lipo de 8000 mah [[http://es.aliexpress.com/store/product/3pcs-lot-3-7V-1100mah-15C-1S-VOLT-20C-Lipo-Battery-Akku-For-RC-Helicopter-free/603538_2024590889.html?spm=2114.04020208.3.52.YKj7Jo&ws_ab_test=searchweb201556_10,searchweb201602_4_10017_10021_507_10022_10020_10009_10008_10018_10019_101,searchweb201603_2&btsid=de915cfe-1c14-4c5d-ba3a-38e714f6e119|aquí hay una de 1100]], usaríamos 6 para comenzar, --> 20 euros
-  - [[http://www.dfrobot.com/index.php?route=product/product&product_id=1308#.V0HbCXV97CK|Kit weather station]], 138$
-**Total: más de 200 euros**
+The anemometer is pending.
+I have spent 77€ so far now.