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ENV Sensor - Variant A (Compact)

marcelpetrick·sensorly-unhinged·hardware/variant-a/env-sensor-a.kicad_pcb

ENV Sensor - Variant A (Compact) PCB layout, top view — open source ESP32 board by marcelpetrick
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About the ENV Sensor - Variant A (Compact) PCB

ENV Sensor - Variant A (Compact) is an open source ESP32 PCB design by marcelpetrick, published on GitHub under the GPL-3.0 license. It is a 4-layer board measuring 30 × 34 mm, with 43 components from 29 distinct parts.

Its main chip is the ESP32-C6-MINI-1-N4, from the ESP32 family. Other key parts include the SHT45-AD1F, TPS62840DLC, BQ24074RGTR and USBLC6-2SC6. By type, the board carries 18 resistors, 14 capacitors, 5 ICs, 2 connectors, 1 transistor and 1 switch.

It belongs with the sensors, iot & wireless and power & battery designs in this gallery.

From the project

Test for my very first custom PCB design for a ESP32-based temperature sensor

A battery-powered indoor temperature and humidity node, developed as one electrical platform in two physical implementations so that the cost of compactness can be measured instead of guessed.

Build 5 of each, put them next to a reference instrument, and let the data pick the design. The decision gate is written down in docs/50-thermal-ab-test-plan.md before the boards exist, including the thresholds under which A wins.

ENV Sensor - Variant A (Compact), from the project README
From the project README

Main components on the ENV Sensor - Variant A (Compact)

ESP32-C6-MINI-1-N4SHT45-AD1FTPS62840DLCBQ24074RGTRUSBLC6-2SC6

ENV Sensor - Variant A (Compact) bill of materials (BOM)

43 components, 29 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ESP32-C6-MINI-1-N4
U1
1
SHT45-AD1F
U2
1
TPS62840DLC
U3
1
BQ24074RGTR
U4
1
USBLC6-2SC6
U5
1
2N7002
Q1
1
USB-C 16P
J1
1
Molex PicoBlade 3P
J2
1
SW_PROV
SW1
1
LED_GREEN
D1
1
2.2uH
L1
1
22uF/6.3V X5R
C1
6
100nF/16V X7R
C2, C5, C6, C12, C13, C14
2
1uF/16V X7R
C3, C4
1
4.7uF/10V X5R
C7
1
10uF/6.3V X5R
C8
1
10uF/16V X5R
C9
2
10uF/6.3V X5R
C10, C11
3
10k 1%
R1, R3, R4
1
3k3 1%
R2
Show 9 more
QtyPartRefs
1
0R
R5
1
267k 1%
R6
4
100k 1%
R7, R8, R9, R10
1
8k00 1%
R11
1
3k01 1%
R12
1
4k42 1%
R13
2
2M2 1%
R14, R15
2
5k1 1%
R16, R17
1
47k 1%
R18

ENV Sensor - Variant A (Compact) design files

The KiCad project lives in the marcelpetrick/sensorly-unhinged repository on GitHub; these links point at the commit this page was built from.

ENV Sensor - Variant A (Compact): common questions

What microcontroller does the ENV Sensor - Variant A (Compact) use?

The ENV Sensor - Variant A (Compact) is built around the ESP32-C6-MINI-1-N4, from the ESP32 family.

How big is the ENV Sensor - Variant A (Compact) PCB?

The ENV Sensor - Variant A (Compact) measures 30 × 34 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the ENV Sensor - Variant A (Compact)?

43 components, from 29 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the ENV Sensor - Variant A (Compact) design files?

From the marcelpetrick/sensorly-unhinged repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the ENV Sensor - Variant A (Compact) design in my own project?

Yes, under the terms of its GPL-3.0 license, which marcelpetrick chose for the repository.

Can I test firmware for the ENV Sensor - Variant A (Compact) without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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