Stevenson Screen for DHT22/MPL3115A2 with Pie Tins
Description
Updated The Probe For The Dht22 / Mpl3115A2, The Holes Coming Up Through The Base Were Enlarged And Sensor Mounting Areas Were Tinkered With After My First Print Showed Some Issues. The Dht22 / Mpl3115A2 Probe Was Made With Tinkercad. Edit It Online If You Need Any Tweaking For Your Sensors. Https://Www.Tinkercad.Com/Things/2Neqpemkfyt This Is A Project That Marries 3D Printed Items (Base And Mount) With Already Available Items (Pie Tins) To Create A Stevenson Screen. To A Purist, Since All The Pieces Can Be Printed They Should Be. I Do Not Have A 3D Printer Yet, So To Lower Costs I Used Some Readily Available Ready Made Items, The Pie Tins Lower The Over Cost Of The Project. I Initially Started Searching For A 3D Project And Found Several Suitable Candidates, But The Cost Was To High. So I Search For A Way To Lower The Cost And Found Two: 1. A Paper By The Usda - Forestry Service Titled "An Inexpensive Meteorological Radiation Shield For Thermistors And Thermocouples" It Is Available On Many Sites Including: Https://Archive.Org/Details/Inexpensivemeteo190Barn 2. A Website Called "Weather For Schools" It Is A Uk Site That Discusses How To Use Plant Pot Saucers As The Stevenson Shield For For The Temperature And Humidity Measurement. Http://Www.Weatherforschools.Me.Uk/Docs/Weather_Box_Sensor.Pdf I Selected Pieces Of Several Remixes To Work In Tandem With The Pie Tins Or Plant Saucers. **I Used The Following Electronic And Off The Shelf Pieces For This Project:** Adafruit Feather M0 Wifi - Atsamd21 + Atwinc1500 Https://Www.Adafruit.Com/Product/3061 - Uses External Antenna Also Available With A Built In Antenna - Https://Www.Adafruit.Com/Product/3010 Terminal Block Breakout Featherwing (The Larger Half Size Prototype Board Could Be Used) Https://Www.Adafruit.Com/Product/2926 Usb / Dc / Solar Lithium Ion/Polymer Charger - V2 Https://Www.Adafruit.Com/Product/390 Blocking Diode I Used A Schottky Diode10Sq045 Medium 6V 2W Solar Panel - 2.0 Watt Https://Www.Adafruit.Com/Product/200 Small Solar Panel Bracket Https://Www.Voltaicsystems.Com/Small-Bracket Solar Extension With Exposed Leads To Go Into The Electronics Box Https://Www.Voltaicsystems.Com/Extension-With-Exposed-Leads Battery - Lithium Ion Polymer Battery - 3.7V 2500Mah Https://Www.Adafruit.Com/Product/328 Thermistor To Measure Temp Of Battery Https://Www.Adafruit.Com/Product/372 3K 1/4W Resistor To Limit Current Draw Based On 6V 2W Solar Panel Https://Www.Jameco.Com/Z/Cf1-4W302Jrc-3K-Ohm-1-4-Watt-Carbon-Film-Resistor_690970.Html Barometric Pressure & Altitude Sensor Mpl3115A2 Https://Www.Adafruit.Com/Product/1893 Temperature / Humidity Sensor Dh22 Https://Www.Adafruit.Com/Product/385 5" Steel Pie Tins Or 6" Plastic Flower Pot Saucers M/F Pair 4 Wire Black Pigtail Plastics Waterproof Ip65 Cable Assembles. There Are Other Brands But I Used Some From. Https://Www.Adafruit.Com/Product/744 Or Https://Www.Amazon.Com/Gp/Product/B01Epn9Y2W/Ref=Oh_Aui_Detailpage_O08_S00?Ie=Utf8&Psc=1 Small Waterproof Nylon Cable Glands Pg7 / M12 Size Suitable For Wire 3Mm-6.5Mm Dia Https://Www.Adafruit.Com/Product/762 Or Https://Www.Amazon.Com/Gp/Product/B01Mqwu4Qw/Ref=Oh_Aui_Detailpage_O01_S01?Ie=Utf8&Psc=1 Waterproof Box To House The Electronics. The One I Used Was 125Mm X 175Mm X 75Mm There Are Several On Thingiverse That Can Be Printed. Https://Www.Thingiverse.Com/Thing:1680291 Or I Choose To Purchase One Https://Www.Adafruit.Com/Product/905 Arcylic Sheet (For Mounting The Circuit Boards) Available In Hardware Stores, Lowes, Home Depot, Etc... M2.5 Or M3 X 6Mm Standoffs I Found These On Amazon M2.5 Or M3 X 5Mm Screws I Found These On Amazon Pole 1" (Bird Feeder Pole) To 1 3/4 (Tv Anntenna Mast) To Mount The Stevenson Shield, The Electronic Enclosure, And Sloar Panel U Bolts Or Clamps Sized For The Pole. Available In Hardware Stores, Lowes, Home Depot, Etc... Follow On Project: Https://Www.Thingiverse.Com/Thing:3529776 This Allows The Sparkfun & Misol Wind Speed, Wind Direction And Rain Fall Measurement To Talk To A Master Station Via I2C.
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