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Std EditionCO2 Detector

License: Public Domain

Project source: Cloned from CO2 Detector

Published Time:2018-03-14 14:39:41
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Description

Uses MH-Z19 or MH-Z16 CO2 detector and DHT-22 (or DHT-11) Temperature/Humidity sensor to give air quality readout and actuate relays if CO2 level goes above 1000ppm (Lo Alarm for turning on extraction fan) and High Alarm at 5000ppm to sound an alarm etc. Uses large 20 x 4 HD44780 display

Hardware is 100% Complete. Software is about 90% Complete (Works but untested and buzzer/silence not yet worked out) Will post code back here and on my website when 100% have attached Work In Progress MPLABX XC8 Code (incomplete but which will display CO2 levels)

Has spare UART brought out to header to attach MODBUS/WiFi/Bluetooth if required. PCB footprint suitable for mounting in standard industrial 158x90x65mm Plastic Enclosure

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ID Name Designator Footprint Quantity
1 ICSP J2 1X05_LOCK 1
2 BUZZER SG3 BUZZER-12MM-NS 1
3 RLA-LO-ALM K1 REY5-19.0X15.0X15.0MM 1
4 MH-Z19 U1 MH-Z19 1
5 RLA-HI-ALM K2 REY5-19.0X15.0X15.0MM 1
6 HLK-PM01 - AC-DC-converter 5V 600mA U2 POWERSUPPLY MODULE HLK-PM01 1
7 fuse U4 FUSE-5X20-PCB 1
8 ALM HI RLA-HI SCREW TERMINAL 5MM 2P 1
9 ALM LO RLA-LO SCREW TERMINAL 5MM 2P 1
10 11.0592Mhz Y1 HC49UP 1
11 mh-z16 U5 JST-PH7 1
12 HT1117-33_SOT223 U8 SOT-223 1
13 SMD1210R075SF F1 F1210 1
14 240VAC PWR SCREW TERMINAL 5MM 2P 1
15 100nF C8,C1,C4,C5 C0805 4
16 IRLML2502TRPBF Q1,Q2,Q3 SEEED-SOT-23 3
17 HI ALM D1 SEEED-LED-0805 1
18 LO ALM D2 SEEED-LED-0805 1
19 10K R3 R0805 1
20 1K R2,R4,R5,R6,R7 R0805 5
21 100R R1 R0805 1
22 22pF C6,C9 C0805 2
23 DHT22 U10 SNR4-2.54-15.5X12.0X5.5MM 1
24 PIC18F23K22 U6 SOIC-28 1
25 PWR D4 SEEED-LED-0805 1
26 1N4007 D3,D5 SEEED-DO-214AC 2
27 ERM2004 (buydisplay.com) X1 HDR1X16 1
28 S20K250 VAR1 CHOKE_HORIZONTAL_RM10MM_REVB 1
29 5.1K R8 R0805 1
30 panel U3 HDR1X4 1

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