EasyEDA User rodyne
rodyne
Public Project: 15 Footprint Package: 59 Likes: 29 Favorites: 25 Views: 15291

CO2 Detector

1 year ago  

License: Public Domain

Status: In Progress

CO2DHT-11HD44780DHT-22MH-Z19MH-Z16PIC18F23K22PIC18F22K22PIC18F24K22
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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

Circuit

Circuit

New PCB

New PCB

Attachments

FilenameDownload
CO2Detector.X.zipDownload

BOM

IDValueQty.PackageComponentsSupplierSeeedStudioManufacturer Part
1ICSP11X05_LOCKJ2
2BUZZER1BUZZER-12MM-NSSG3
3RLA-LO-ALM1REY5-19.0X15.0X15.0MMK1SeeedStudio315030000HLS8L-DC5V-S-C
4MH-Z191MH-Z19U1
5RLA-HI-ALM1REY5-19.0X15.0X15.0MMK2SeeedStudio315030000HLS8L-DC5V-S-C
6HLK-PM01 - AC-DC-converter 5V 600mA1PowerSupply module HLK-PM01U2
7fuse1FUSE-5X20-PCBU4
8ALM HI1Screw Terminal 5mm 2PRLA-HI
9ALM LO1Screw Terminal 5mm 2PRLA-LO
1011.0592Mhz1HC49UPY1SeeedStudio306010014HC-49US 16.000MHz
11mh-z161JST-PH7U5
12HT1117-33_SOT2231SOT-223U8
13SMD1210R075SF1F1210F1SeeedStudio307010010SMD1210R075SF
14240VAC1Screw Terminal 5mm 2PPWR
15100nF4C0805C8,C1,C4,C5SeeedStudio302010165CC0805KRX7R9BB104
16IRLML2502TRPBF3Seeed-SOT-23Q1,Q2,Q3SeeedStudio305030022
17HI ALM1Seeed-LED-0805D1SeeedStudio30409004617-215SURC/S530-A2/TR8
18LO ALM1Seeed-LED-0805D2SeeedStudio30409004617-215SURC/S530-A2/TR8
1910K1R0805R3SeeedStudio301010361RC0805FR-0710KL
201K5R0805R2,R4,R5,R6,R7SeeedStudio301010311RC0805JR-071KL
21100R1R0805R1SeeedStudio301010319RC0805JR-07100RL
2222pF2C0805C6,C9SeeedStudio302010151CC0805JRNPO9BN220
23DHT221SNR4-2.54-15.5X12.0X5.5MMU10SeeedStudio314010000DHT11
24PIC18F23K221SOIC-28U6
25PWR1Seeed-LED-0805D4SeeedStudio30409004617-215SURC/S530-A2/TR8
261N40072Seeed-DO-214ACD3,D5SeeedStudio3040100131N4007
27ERM2004 (buydisplay.com)1HDR1X16X1EastRising (buydisplay.com)ERM2004
28S20K2501CHOKE_HORIZONTAL_RM10MM_REVBVAR1
295.1K1R0805R8SeeedStudio301010311RC0805JR-071KL
30panel1HDR1X4U3

Comments

rodyne

MPLAB XC8 C Code for projects is zipped and attached.

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