HardLabs

Tiny sensor

larry-wong·tiny_sensor·circut/pcb.kicad_pcb

Tiny sensor PCB layout, top view — open source ESP32 board by larry-wong
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About the Tiny sensor PCB

Tiny sensor is an open source ESP32 PCB design by larry-wong, published on GitHub. It is a 2-layer board measuring 22 × 71 mm, with 18 components from 14 distinct parts.

Its main chip is the ESP32-S3-WROOM-1, from the ESP32 family. Other key parts include the AMS1117 and HDC1080. By type, the board carries 5 resistors, 4 capacitors, 3 ICs, 3 connectors, 2 diodes and 1 transistor.

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

From the project

基于 ESP32-S3 的温湿度 / 光照 / 人体存在传感器和红外发射器。

基于 ESP32 的家庭智能传感器，搭配 Home Assistant 项目实现家自动化。

所有贴片元件均采用 0805 封装尺寸 焊接时可多留一些红外管引脚，以调整发射方向 不需要的传感器可留空 由于不同颜色发光二极管的压降不同，在 R3 为 100 欧姆时 D2 采用红色发光二极管效果较好，采用黄色发光二极管时亮度较低。若要使用其他颜色发光二极管可自行计算 R3 阻值。

暴露以下传感器至 Home Assistant: 一个温度传感器 一个湿度传感器 一个光照度传感器 一个人体存在二元传感器 一个人体存在距离传感器 一个可开关的 LED 灯（复用状态灯） 项目中对红外管的使用比较客制化，使用自定义的 MQTT 消息驱动。建议改用 Remote Transmitter 或自行修改。

                         

Tiny sensor, from the project README
From the project README

Main components on the Tiny sensor

AMS1117HDC1080ESP32-S3-WROOM-1

Tiny sensor bill of materials (BOM)

18 components, 14 distinct parts.

QtyPartRefs
1
AMS1117
U1
1
HDC1080
U2
1
ESP32-S3-WROOM-1
U3
1
S8050
Q1
1
GY-302
J1
1
LD2410B
J2
1
USB_C_Receptacle_USB2.0
J3
1
IR
D1
1
LED
D2
1
10uF
C1
1
22uF
C2
2
0.1uF
C3, C4
3
10k
R1, R4, R5
2
100
R2, R3

Tiny sensor design files

The KiCad project lives in the larry-wong/tiny_sensor repository on GitHub; these links point at the commit this page was built from.

Tiny sensor: common questions

What microcontroller does the Tiny sensor use?

The Tiny sensor is built around the ESP32-S3-WROOM-1, from the ESP32 family.

How big is the Tiny sensor PCB?

The Tiny sensor measures 22 × 71 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Tiny sensor?

18 components, from 14 distinct parts. The full bill of materials is listed on this page.

Where can I download the Tiny sensor design files?

From the larry-wong/tiny_sensor repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Tiny sensor design in my own project?

The repository has no license, so all rights stay with larry-wong. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Tiny sensor 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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