<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE eagle SYSTEM "eagle.dtd">
<eagle version="7.5.0">
<drawing>
<board>
<plain>
<wire x1="49.53" y1="0" x2="0" y2="0" width="0.2032" layer="20"/>
<wire x1="0" y1="0" x2="0" y2="49.53" width="0.2032" layer="20"/>
<wire x1="0" y1="49.53" x2="49.53" y2="49.53" width="0.2032" layer="20"/>
<wire x1="49.53" y1="49.53" x2="49.53" y2="0" width="0.2032" layer="20"/>
<hole x="1.27" y="48.26" drill="2.2"/>
<hole x="48.26" y="48.26" drill="2.2"/>
<hole x="48.26" y="1.27" drill="2.2"/>
<hole x="1.27" y="1.27" drill="2.2"/>
<text>ATMEGA328P</text>
<text>S1</text>
<text>S2</text>
<text>S3</text>
<text>BSS138</text>
<text>BSS138</text>
<text>LM1117-3.3</text>
<text>ESP8266</text>
<text>GND</text>
<text>5VDC</text>
<text>VCC</text>
<text>GND</text>
<text>RX</text>
<text>TX</text>
<text>RST</text>
<text>BUZZER</text>
<text>Atmosphere v1.0
</text>
<text>Matteo Bavecchi</text>
<text>Atmosphere v1.0</text>
<text>Matteo Bavecchi</text>
</plain>
<libraries>
<library name="SparkFun-Connectors">
<description>&lt;h3&gt;SparkFun Electronics' preferred foot prints&lt;/h3&gt;
In this library you'll find connectors and sockets- basically anything that can be plugged into or onto.&lt;br&gt;&lt;br&gt;
We've spent an enormous amount of time creating and checking these footprints and parts, but it is the end user's responsibility to ensure correctness and suitablity for a given componet or application. If you enjoy using this library, please buy one of our products at www.sparkfun.com.
&lt;br&gt;&lt;br&gt;
&lt;b&gt;Licensing:&lt;/b&gt; Creative Commons ShareAlike 4.0 International - https://creativecommons.org/licenses/by-sa/4.0/ 
&lt;br&gt;&lt;br&gt;
You are welcome to use this library for commercial purposes. For attribution, we ask that when you begin to sell your device using our footprint, you email us with a link to the product being sold. We want bragging rights that we helped (in a very small part) to create your 8th world wonder. We would like the opportunity to feature your device on our homepage.</description>
<packages>
<package name="LUXEON-PAD">
</package>
<package name="1X04_NO_SILK_ALL_ROUND">
</package>
<package name="1X09">
</package>
<package name="1X05">
</package>
</packages>
</library>
<library name="SparkFun-DiscreteSemi">
<description>&lt;h3&gt;SparkFun Electronics' preferred foot prints&lt;/h3&gt;
In this library you'll find discrete semiconductors- transistors, diodes, TRIACs, optoisolators, etc.&lt;br&gt;&lt;br&gt;
We've spent an enormous amount of time creating and checking these footprints and parts, but it is the end user's responsibility to ensure correctness and suitablity for a given componet or application. If you enjoy using this library, please buy one of our products at www.sparkfun.com.
&lt;br&gt;&lt;br&gt;
&lt;b&gt;Licensing:&lt;/b&gt; Creative Commons ShareAlike 4.0 International - https://creativecommons.org/licenses/by-sa/4.0/ 
&lt;br&gt;&lt;br&gt;
You are welcome to use this library for commercial purposes. For attribution, we ask that when you begin to sell your device using our footprint, you email us with a link to the product being sold. We want bragging rights that we helped (in a very small part) to create your 8th world wonder. We would like the opportunity to feature your device on our homepage.</description>
<packages>
<package name="SOT23-3">
</package>
</packages>
</library>
<library name="SparkFun-Electromechanical">
<description>&lt;h3&gt;SparkFun Electronics' preferred foot prints&lt;/h3&gt;
In this library you'll find anything that moves- switches, relays, buttons, potentiometers. Also, anything that goes on a board but isn't electrical in nature- screws, standoffs, etc.&lt;br&gt;&lt;br&gt;
We've spent an enormous amount of time creating and checking these footprints and parts, but it is the end user's responsibility to ensure correctness and suitablity for a given componet or application. If you enjoy using this library, please buy one of our products at www.sparkfun.com.
&lt;br&gt;&lt;br&gt;
&lt;b&gt;Licensing:&lt;/b&gt; Creative Commons ShareAlike 4.0 International - https://creativecommons.org/licenses/by-sa/4.0/ 
&lt;br&gt;&lt;br&gt;
You are welcome to use this library for commercial purposes. For attribution, we ask that when you begin to sell your device using our footprint, you email us with a link to the product being sold. We want bragging rights that we helped (in a very small part) to create your 8th world wonder. We would like the opportunity to feature your device on our homepage.</description>
<packages>
<package name="BUZZER-12MM">
<description>&lt;b&gt;BUZZER&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="SparkFun-Retired">
<description>&lt;h3&gt;SparkFun Electronics' preferred foot prints&lt;/h3&gt;
In this library you'll find all manner of retired footprints for resistors, capacitors, board names, ICs, etc., that are no longer used in our catalog.&lt;br&gt;&lt;br&gt;
We've spent an enormous amount of time creating and checking these footprints and parts, but it is the end user's responsibility to ensure correctness and suitablity for a given componet or application. If you enjoy using this library, please buy one of our products at www.sparkfun.com.
&lt;br&gt;&lt;br&gt;
&lt;b&gt;Licensing:&lt;/b&gt;Creative Commons ShareAlike 4.0 International - https://creativecommons.org/licenses/by-sa/4.0/
&lt;br&gt;&lt;br&gt;
You are welcome to use this library for commercial purposes. For attribution, we ask that when you begin to sell your device using our footprint, you email us with a link to the product being sold. We want bragging rights that we helped (in a very small part) to create your 8th world wonder. We would like the opportunity to feature your device on our homepage.</description>
<packages>
<package name="CREATIVE_COMMONS">
</package>
</packages>
</library>
<library name="SparkFun-Sensors">
<description>&lt;h3&gt;SparkFun Electronics' preferred foot prints&lt;/h3&gt;
In this library you'll find sensors- accelerometers, gyros, compasses, magnetometers, light sensors, imagers, temp sensors, etc.&lt;br&gt;&lt;br&gt;
We've spent an enormous amount of time creating and checking these footprints and parts, but it is the end user's responsibility to ensure correctness and suitablity for a given componet or application. If you enjoy using this library, please buy one of our products at www.sparkfun.com.
&lt;br&gt;&lt;br&gt;
&lt;b&gt;Licensing:&lt;/b&gt; Creative Commons ShareAlike 4.0 International - https://creativecommons.org/licenses/by-sa/4.0/ 
&lt;br&gt;&lt;br&gt;
You are welcome to use this library for commercial purposes. For attribution, we ask that when you begin to sell your device using our footprint, you email us with a link to the product being sold. We want bragging rights that we helped (in a very small part) to create your 8th world wonder. We would like the opportunity to feature your device on our homepage.</description>
<packages>
<package name="MQ-3">
<description>MQ-3 in Configuration B</description>
</package>
</packages>
</library>
<library name="SparkFun-Passives">
<description>&lt;h3&gt;SparkFun Electronics' preferred foot prints&lt;/h3&gt;
In this library you'll find resistors, capacitors, inductors, test points, jumper pads, etc.&lt;br&gt;&lt;br&gt;
We've spent an enormous amount of time creating and checking these footprints and parts, but it is the end user's responsibility to ensure correctness and suitablity for a given componet or application. If you enjoy using this library, please buy one of our products at www.sparkfun.com.
&lt;br&gt;&lt;br&gt;
&lt;b&gt;Licensing:&lt;/b&gt; Creative Commons ShareAlike 4.0 International - https://creativecommons.org/licenses/by-sa/4.0/ 
&lt;br&gt;&lt;br&gt;
You are welcome to use this library for commercial purposes. For attribution, we ask that when you begin to sell your device using our footprint, you email us with a link to the product being sold. We want bragging rights that we helped (in a very small part) to create your 8th world wonder. We would like the opportunity to feature your device on our homepage.</description>
<packages>
<package name="0805">
</package>
</packages>
</library>
<library name="SparkFun-PowerIC">
<description>&lt;h3&gt;SparkFun Electronics' preferred foot prints&lt;/h3&gt;
In this library you'll find drivers, regulators, and amplifiers.&lt;br&gt;&lt;br&gt;
We've spent an enormous amount of time creating and checking these footprints and parts, but it is the end user's responsibility to ensure correctness and suitablity for a given componet or application. If you enjoy using this library, please buy one of our products at www.sparkfun.com.
&lt;br&gt;&lt;br&gt;
&lt;b&gt;Licensing:&lt;/b&gt; Creative Commons ShareAlike 4.0 International - https://creativecommons.org/licenses/by-sa/4.0/ 
&lt;br&gt;&lt;br&gt;
You are welcome to use this library for commercial purposes. For attribution, we ask that when you begin to sell your device using our footprint, you email us with a link to the product being sold. We want bragging rights that we helped (in a very small part) to create your 8th world wonder. We would like the opportunity to feature your device on our homepage.</description>
<packages>
<package name="SOT223">
<description>&lt;b&gt;SOT-223&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="thecustomgeek">
<description>A humble collection of custom parts.</description>
<packages>
<package name="TQFP32-08">
<description>&lt;B&gt;Thin Plasic Quad Flat Package&lt;/B&gt; Grid 0.8 mm</description>
</package>
</packages>
</library>
<library name="SparkFun-Sensors2">
<description>&lt;h3&gt;SparkFun Electronics' preferred foot prints&lt;/h3&gt;
In this library you'll find sensors- accelerometers, gyros, compasses, magnetometers, light sensors, imagers, temp sensors, etc.&lt;br&gt;&lt;br&gt;
We've spent an enormous amount of time creating and checking these footprints and parts, but it is the end user's responsibility to ensure correctness and suitablity for a given componet or application. If you enjoy using this library, please buy one of our products at www.sparkfun.com.
&lt;br&gt;&lt;br&gt;
&lt;b&gt;Licensing:&lt;/b&gt; Creative Commons ShareAlike 4.0 International - https://creativecommons.org/licenses/by-sa/4.0/ 
&lt;br&gt;&lt;br&gt;
You are welcome to use this library for commercial purposes. For attribution, we ask that when you begin to sell your device using our footprint, you email us with a link to the product being sold. We want bragging rights that we helped (in a very small part) to create your 8th world wonder. We would like the opportunity to feature your device on our homepage.</description>
<packages>
<package name="MQ-3">
<description>MQ-3 in Configuration B</description>
</package>
</packages>
</library>
<library name="rc-master-smd">
<description>&lt;b&gt;R/C MASTER-SMD! - v1.01 (07/03/2007)&lt;/b&gt;&lt;p&gt;
&lt;p&gt;This library is a collection of SMD ONLY resistors and capacitors by various manufacturers. The pad sizes, spacing and silkscreen widths have been tweaked for use in dense fine pitch layouts where space, alignment and precision are critical. In general these components are designed for routing in grid increments of 5 mils&lt;/p&gt;
&lt;p&gt;* Silkscreen line elements are a minimum of 8 mils in width. All components have text sizes of 0.032"  or 0.04".&lt;/p&gt;
&lt;p&gt;* A silkscreen text values use a ratio of 18 in all cases.&lt;/p&gt;
&lt;p&gt;* ALL PADS AND PART OUTLINES ARE SNAPPED TO A 5 MIL GRID!&lt;/p&gt;
&lt;p&gt;&lt;h4&gt;All components are prefixed using the following conventions:&lt;/h4&gt;&lt;/p&gt;
&lt;table width="380" border="1" bordercolor="#000000"&gt;
  &lt;tr&gt; 
    &lt;td width="81" bgcolor="#33CCFF"&gt;&lt;div align="center"&gt;&lt;strong&gt;Prefix&lt;/strong&gt;&lt;/div&gt;&lt;/td&gt;
    &lt;td width="289" bgcolor="#33CCFF"&gt;&lt;div align="center"&gt;&lt;strong&gt;Description&lt;/strong&gt;&lt;/div&gt;&lt;/td&gt;
  &lt;/tr&gt;
  &lt;tr&gt; 
    &lt;td&gt;&lt;div align="center"&gt;CBP_&lt;/div&gt;&lt;/td&gt;
    &lt;td&gt;&lt;div align="center"&gt;Bipolar Electrolytic Types&lt;/div&gt;&lt;/td&gt;
  &lt;/tr&gt;
  &lt;tr&gt; 
    &lt;td&gt;&lt;div align="center"&gt;CCA_&lt;/div&gt;&lt;/td&gt;
    &lt;td&gt;&lt;div align="center"&gt;Chip Cap Array Types&lt;/div&gt;&lt;/td&gt;
  &lt;/tr&gt;
  &lt;tr&gt; 
    &lt;td&gt;&lt;div align="center"&gt;CP_&lt;/div&gt;&lt;/td&gt;
    &lt;td&gt;&lt;div align="center"&gt;Polarized Electrolytic/Tantalum Types&lt;/div&gt;&lt;/td&gt;
  &lt;/tr&gt;
  &lt;tr&gt; 
    &lt;td&gt;&lt;div align="center"&gt;C_&lt;/div&gt;&lt;/td&gt;
    &lt;td&gt;&lt;div align="center"&gt;Non-Polarized Film / Chip Types&lt;/div&gt;&lt;/td&gt;
  &lt;/tr&gt;
  &lt;tr&gt; 
    &lt;td&gt;&lt;div align="center"&gt;FB_&lt;/div&gt;&lt;/td&gt;
    &lt;td&gt;&lt;div align="center"&gt;Simple Ferrite Bead Types&lt;/div&gt;&lt;/td&gt;
  &lt;/tr&gt;
  &lt;tr&gt; 
    &lt;td&gt;&lt;div align="center"&gt;L_&lt;/div&gt;&lt;/td&gt;
    &lt;td&gt;&lt;div align="center"&gt;Simple Chip Inductors&lt;/div&gt;&lt;/td&gt;
  &lt;/tr&gt;
  &lt;tr&gt; 
    &lt;td&gt;&lt;div align="center"&gt;R_&lt;/div&gt;&lt;/td&gt;
    &lt;td&gt;&lt;div align="center"&gt;Resistor Types&lt;/div&gt;&lt;/td&gt;
  &lt;/tr&gt;
&lt;/table&gt;
&lt;p&gt;&lt;author&gt;THIS LIBRARY IS PROVIDED AS IS AND WITHOUT WARRANTY OF ANY KIND, EXPRESSED OR IMPLIED.&lt;br&gt;Copyright (C) 2007, Bob Starr&lt;br&gt; http://www.bobstarr.net&lt;br&gt;
&lt;/author&gt;</description>
<packages>
<package name="C3528-21/T">
<description>&lt;b&gt;SMD CHIP TANT&lt;/b&gt; - KEMET B / EIA 3528-21 Reflow solder&lt;p&gt;
KEMET T / EIA 3528-12</description>
</package>
</packages>
</library>
</libraries>
<attributes>
</attributes>
<variantdefs>
</variantdefs>
<elements>
<element name="+" library="SparkFun-Connectors" package="LUXEON-PAD" value="">
<attribute name="VALUE"/>
</element>
<element name="-" library="SparkFun-Connectors" package="LUXEON-PAD" value="">
<attribute name="VALUE"/>
</element>
<element name="ATMEGA328P-AU" library="thecustomgeek" package="TQFP32-08" value="ATMEGA328"/>
<element name="BSS138" library="SparkFun-DiscreteSemi" package="SOT23-3" value="">
<attribute name="PROD_ID" value="TRANS-00830"/>
<attribute name="VALUE"/>
</element>
<element name="BSS138-2" library="SparkFun-DiscreteSemi" package="SOT23-3" value="">
<attribute name="PROD_ID" value="TRANS-00830"/>
<attribute name="VALUE"/>
</element>
<element name="BUZZER" library="SparkFun-Electromechanical" package="BUZZER-12MM" value="BUZZERPTH"/>
<element name="C1" library="rc-master-smd" package="C3528-21/T" value="10uF">
<attribute name="NAME"/>
</element>
<element name="C2" library="rc-master-smd" package="C3528-21/T" value="10uF">
<attribute name="NAME"/>
</element>
<element name="DHT11" library="SparkFun-Connectors" package="1X04_NO_SILK_ALL_ROUND" value="">
<attribute name="PROD_ID" value="CONN-09696"/>
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="ESP-ADC1" library="SparkFun-Connectors" package="1X09" value="">
<attribute name="VALUE"/>
</element>
<element name="ESP-ADC2" library="SparkFun-Connectors" package="1X09" value="">
<attribute name="VALUE"/>
</element>
<element name="FRAME1" library="SparkFun-Retired" package="CREATIVE_COMMONS" value="FRAME-LETTER"/>
<element name="J1" library="SparkFun-Connectors" package="1X05" value="">
<attribute name="VALUE"/>
</element>
<element name="MQ-135" library="SparkFun-Sensors" package="MQ-3" value="METHANE_SENSOR"/>
<element name="MQ-2" library="SparkFun-Sensors2" package="MQ-3" value="METHANE_SENSOR"/>
<element name="R1" library="SparkFun-Passives" package="0805" value="">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="R2" library="SparkFun-Passives" package="0805" value="">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="R3" library="SparkFun-Passives" package="0805" value="">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="R4" library="SparkFun-Passives" package="0805" value="">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="R5" library="SparkFun-Passives" package="0805" value="">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="R6" library="SparkFun-Passives" package="0805" value="">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="R7" library="SparkFun-Passives" package="0805" value="">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="R8" library="SparkFun-Passives" package="0805" value="">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="U$1" library="SparkFun-Sensors" package="MQ-3" value="METHANE_SENSOR"/>
<element name="U1" library="SparkFun-PowerIC" package="SOT223" value="">
<attribute name="PROD_ID" value="VREG-08170"/>
<attribute name="VALUE"/>
</element>
</elements>
<signals>
<signal name="GND">
<contactref element="-" pad="P$1"/>
<contactref element="ATMEGA328P-AU" pad="5"/>
<contactref element="ATMEGA328P-AU" pad="21"/>
<contactref element="ATMEGA328P-AU" pad="3"/>
<contactref element="J1" pad="2"/>
<contactref element="DHT11" pad="4"/>
<contactref element="BUZZER" pad="-"/>
<contactref element="C1" pad="-"/>
<contactref element="U1" pad="1"/>
<contactref element="C2" pad="-"/>
<contactref element="ESP-ADC1" pad="1"/>
<contactref element="R8" pad="2"/>
<contactref element="MQ-2" pad="HB"/>
<contactref element="R7" pad="1"/>
<contactref element="MQ-135" pad="HB"/>
<contactref element="R6" pad="1"/>
<contactref element="U$1" pad="HB"/>
</signal>
<signal name="DHT-11">
<contactref element="DHT11" pad="2"/>
<contactref element="R5" pad="1"/>
<contactref element="ATMEGA328P-AU" pad="2"/>
</signal>
<signal name="N$2">
<contactref element="ATMEGA328P-AU" pad="9"/>
<contactref element="BUZZER" pad="+"/>
</signal>
<signal name="RX">
<contactref element="ATMEGA328P-AU" pad="30"/>
<contactref element="J1" pad="4"/>
</signal>
<signal name="TX">
<contactref element="ATMEGA328P-AU" pad="31"/>
<contactref element="J1" pad="5"/>
</signal>
<signal name="RST">
<contactref element="J1" pad="3"/>
<contactref element="ATMEGA328P-AU" pad="29"/>
</signal>
<signal name="ESP_RX">
<contactref element="ATMEGA328P-AU" pad="32"/>
<contactref element="BSS138" pad="3"/>
<contactref element="R2" pad="1"/>
</signal>
<signal name="ESP_TX">
<contactref element="ATMEGA328P-AU" pad="1"/>
<contactref element="BSS138-2" pad="3"/>
<contactref element="R4" pad="1"/>
</signal>
<signal name="ESP_3.3_TX">
<contactref element="BSS138" pad="2"/>
<contactref element="R1" pad="1"/>
<contactref element="ESP-ADC1" pad="4"/>
</signal>
<signal name="ESP_3.3_RX">
<contactref element="ESP-ADC1" pad="3"/>
<contactref element="BSS138-2" pad="2"/>
<contactref element="R3" pad="1"/>
</signal>
<signal name="N$3">
<contactref element="MQ-2" pad="B2"/>
<contactref element="R8" pad="1"/>
</signal>
<signal name="MQ-2">
<contactref element="MQ-2" pad="B1"/>
<contactref element="ATMEGA328P-AU" pad="26"/>
</signal>
<signal name="N$4">
<contactref element="MQ-135" pad="B2"/>
<contactref element="R7" pad="2"/>
</signal>
<signal name="MQ-135">
<contactref element="MQ-135" pad="B1"/>
<contactref element="ATMEGA328P-AU" pad="27"/>
</signal>
<signal name="N$6">
<contactref element="U$1" pad="B2"/>
<contactref element="R6" pad="2"/>
</signal>
<signal name="MQ-7">
<contactref element="U$1" pad="B1"/>
<contactref element="ATMEGA328P-AU" pad="25"/>
</signal>
<signal name="5V">
<contactref element="+" pad="P$1"/>
<contactref element="ATMEGA328P-AU" pad="6"/>
<contactref element="ATMEGA328P-AU" pad="4"/>
<contactref element="ATMEGA328P-AU" pad="18"/>
<contactref element="J1" pad="1"/>
<contactref element="R2" pad="2"/>
<contactref element="R4" pad="2"/>
<contactref element="U1" pad="3"/>
<contactref element="C1" pad="+"/>
<contactref element="DHT11" pad="1"/>
<contactref element="R5" pad="2"/>
<contactref element="MQ-2" pad="A2"/>
<contactref element="MQ-2" pad="A1"/>
<contactref element="MQ-2" pad="HA"/>
<contactref element="MQ-135" pad="HA"/>
<contactref element="MQ-135" pad="A1"/>
<contactref element="MQ-135" pad="A2"/>
<contactref element="U$1" pad="A2"/>
<contactref element="U$1" pad="A1"/>
<contactref element="U$1" pad="HA"/>
</signal>
<signal name="3.3V">
<contactref element="R1" pad="2"/>
<contactref element="BSS138" pad="1"/>
<contactref element="R3" pad="2"/>
<contactref element="BSS138-2" pad="1"/>
<contactref element="C2" pad="+"/>
<contactref element="U1" pad="2"/>
<contactref element="ESP-ADC1" pad="6"/>
<contactref element="ESP-ADC1" pad="2"/>
<contactref element="ESP-ADC1" pad="5"/>
</signal>
</signals>
</board>
</drawing>
</eagle>
