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Disclaimer: The material in this repository is intended as documentation of the process by which the King's College London environmental monitoring team build our open-source loggers. Though we take care to ensure that the pages are accurate as of the date of publication, Arduino software, libraries, electronic components and interface devices are all subject to variation, change with time, and all introduce the potential for risk. The authors take no responsibility for the consequences of error or for any loss, damage or injury suffered by users or their property as a result of any of the information published on any of these pages, and such information does not form any basis of a contract with readers or users of it. The audience should verify any information provided and only proceed if they have an adequate understanding of electronics and electronics safety.
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Part NameQuantity~Cost/item (£)Total Cost (£)Link
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Arduino pro mini 3.3 V14.94.9
https://kunkune.co.uk/shop/arduino-compatible-boards/pro-mini-328-mini-3-3v-5v/
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Micro SD card 1GB12.982.98
Cloudisk Micro Sd Card 1gb 2gb 4gb 8gb 16gb 32gb 64gb 128gb - Temu United Kingdom
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Real time clock (RTC) module ds3234120.3820.38
DS3234 DeadOn Real Time Clock (RTC) Breakout Board - Sparkfun Electronics | CPC (farnell.com)
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Micro SD card holder 3.3 V10.130.13
MicroSD Card Module - ProtoSupplies
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10kΩ thermistor11.621.62
B57863S0103F040 | EPCOS B57863S0103F40 Thermistor 10kΩ, 2.41 (Dia.) x 6.5mm | RS (rs-online.com)
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MPX5010DP differential pressure sensor 10kPa119.4919.49
https://uk.rs-online.com/web/p/pressure-sensors/9227324
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PCB screw terminals (2-terminal)120.627.44
RS PRO PCB Terminal Block, 2-Contact, 2.54mm Pitch, Through Hole Mount, 1-Row, Screw Termination | RS (rs-online.com)
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Battery holder, coil spring (4 x AA)11.261.26
RS PRO AA Battery Holder, Coil Spring Contact | RS (rs-online.com)
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AA Batteries40.281.12
RS PRO Alkaline AA Battery 1.5V | RS (rs-online.com)
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Battery snap connector10.690.69
RS PRO 9V PP3 Battery Clip, Press Stud Contact | RS (rs-online.com)
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4-core cable (~1.5m) 10.750.75
RS PRO Control Cable, 4 Cores, 0.75 mm², YY, Unscreened, 50m, Grey PVC Sheath | RS (rs-online.com)
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Cable glands (4mm minimum, IP68)21.052.1
RS PRO White Nylon Cable Gland, M16 Thread, 5mm Min, 10mm Max, IP68 | RS (rs-online.com)
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Rubber tubing (3 mm x >1m)10.770.77
aliexpress.com/item/1005002330923045.html?spm=a2g0o.productlist.main.17.7d087c9aJDUKfN&algo_pvid=342b1ed2-3e5d-4d1a-b132-947af6304f5d&algo_exp_id=342b1ed2-3e5d-4d1a-b132-947af6304f5d-8&pdp_ext_f=%7B"sku_id"%3A"12000025762716789"%7D&pdp_npi=2%40dis%21GBP%218.79%217.47%21%21%21%21%21%40211be10916744864158641389d06d2%2112000025762716789%21sea&curPageLogUid=19qNEHyld6v5
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Small enclosure13.273.27
RS PRO Grey ABS Enclosure, IP65, IK09, Grey Lid, 81.95 x 79.95 x 55mm | RS (rs-online.com)
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Larger enclosure113.113.1
https://uk.rs-online.com/web/p/general-purpose-enclosures/2010184
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Epoxy (250g)16.836.83
https://uk.rs-online.com/web/p/potting-compounds/4228218
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10k Ω 0.4 W ±1% resistor20.130.26
RSPMOA0318FAOHR100 | RS PRO 100mΩ Metal Film Resistor 0.4W ±1% | RS (rs-online.com)
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4.7kΩ 2 W ±5% resistor10.1080.108
RS PRO 4.7kΩ Carbon Film Resistor 0.25W ±5% | RS (rs-online.com)
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5V step up regulator112.812.8
https://uk.robotshop.com/products/5v-step-up-step-down-voltage-regulator-s7v8f5
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Insulated wire10.290.29
https://uk.rs-online.com/web/c/cables-wires/single-core-cable/hook-up-wire/?pn=1&searchTerm=wire&sortBy=P_breakPrice1&sortType=ASC
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CH340 USB to TTL serial adapter 12.992.99
CH340 USB to TTL Serial Adaptor (hobbycomponents.com)
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Custom personalised circuit board15.475.47
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Total108.748
KCLGeography/EnvPCBdesigns: PCB designs for environmental sensors (github.com)
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