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Modbus Sensirion SCD4x QFN, 20 Pin (https://pdfserv.maximintegrated.com/package_dwgs/21-0139.PDF (T2044-5C)), generated with kicad-footprint-generator LED SMD right angle DPDT push button https://www.e-switch.com/system/asset/product_line/data_sheet/210/800U.pdf momentary / push-push button, h=20.5mm C&K PVA2 https://www.ckswitches.com/media/1343/pva.pdf tact sw push PVA2 DPDT momentary / push-push button, h=15mm C&K PVA1 https://www.ckswitches.com/media/1343/pva.pdf momentary / push-push button, h=20.5mm C&K PVA2 https://www.ckswitches.com/media/1343/pva.pdf momentary / push-push button, h=17.5mm C&K PVA2 https://www.ckswitches.com/media/1343/pva.pdf right angle (source: https://www.cnctech.us/pdfs/C-ARA1-AK512.pdf USB C Type-C Receptacle USB2.0 USB Type B 10103594-0001LF, http://cdn.amphenol-icc.com/media/wysiwyg/files/drawing/10103594.pdf USB USB_B USB_Mini connector usb mini receptacle vertical Hirose DF12C SMD, DF12C3.0-10DS-0.5V, 10 Pins per row (https://www.hirose.com/product/document?clcode=CL0537-0834-6-81&productname=DF12E(3.0)-50DP-0.5V(81)&series=DF12&documenttype=2DDrawing&lang=en&documentid=0000992393), generated with kicad-footprint-generator JST SHL series connector, BM03B-SRSS-TB (http://www.jst-mfg.com/product/pdf/eng/eSH.pdf), generated with kicad-footprint-generator Molex Mini-Fit Jr. Power Connectors, 43915-xx08, 4 Pins (http://www.farnell.com/datasheets/2157639.pdf), generated with kicad-footprint-generator JST SH series connector, 502443-0970 (http://www.molex.com/pdm_docs/sd/5024430270_sd.pdf), generated with kicad-footprint-generator ACDC-Converter, 3W, HiLink, HLK-PMxx, THT, http://www.hlktech.net/product_detail.php?ProId=54 ACDC-Converter 3W THT HiLink board mount | | Tayda | A-1531 or A-557 | | U2 | 1 | B10k | **Potentiometer, 16 mm vertical board mount | | | J11 | 3 | 100R | Resistor | | Tayda | A-4349 | | Screws and spacers (see [build notes](build.md | | | R4, R6, R7, R30, R31 Switch, dual pole triple throw, 3 position switch, SP3T K switch dp3t ON-ON-ON D Switch, single pole double throw, center OFF position K switch dp3t ON-ON-ON D Switch, three position, dual pole double throw, separate symbols | | | Q1, Q2, Q3, Q4, Q5 R1, R2, R23, R24 | 4 .../PCB/precadsr_Gerbers/precadsr-F_Cu.gbr | 4 | 100 nF | Unpolarized capacitor | | | | | S3 | 1 | TL071 | Operational amplifier, DIP-8 | | J9 | 1 | ICM7555xP .

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