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ESP-AHT10-Extra

c-·ESP-AHT10-Extra

ESP-AHT10-Extra PCB layout, top view — open source ESP8266 board by c-

About the ESP-AHT10-Extra PCB

ESP-AHT10-Extra is an open source ESP8266 PCB design by c-, published on GitHub. It is a 2-layer board measuring 38.3 × 20.8 mm, with 26 components from 15 distinct parts.

Its main chip is the ESP-12, from the ESP8266 family. Other key parts include the CH330N, HT7233, AHT10, USBLC6-2SC6 and VEML7700. By type, the board carries 8 capacitors, 8 resistors, 6 ICs, 2 switches, 1 fuse and 1 diode.

It belongs with the sensors designs in this gallery.

From the project

minimalist ESP-8266 temperature/humidity sensor

Minimalist/compact ESP-8266 environmental sensor/programmer.

This is a Kicad design which uses a PCB USB connector and integrates a ESP-12 (or 07), CH330N USB controller, a small voltage regulator (HT7233), an AHT-10 temperature/humidity sensor, and a VEML-7700 ambient light sensor. Flash and reset buttons are also included.

My prototype was done on a PCB mill (0.3mm 30 degree V-bit), so things like trace sizes and clearances reflect that. 0805 passives are used since that's as small as I can go and still be able to route a trace between the pads.

ESP-AHT10-Extra, from the project README
From the project README

Main components on the ESP-AHT10-Extra

CH330NHT7233ESP-12AHT10USBLC6-2SC6VEML7700

ESP-AHT10-Extra bill of materials (BOM)

26 components, 15 distinct parts.

QtyPartRefs
1
CH330N
U1
1
HT7233
U2
1
ESP-12
U3
1
AHT10
U4
1
USBLC6-2SC6
U5
1
VEML7700
U6
1
350mA
F1
1
RESET
SW1
1
PROG
SW2
1
B5817W
D1
6
100n
C1, C3, C5, C6, C7, C8
2
10u
C2, C4
6
10K
R1, R3, R4, R5, R6, R7
1
1K
R2
1
470R
R8

ESP-AHT10-Extra design files

The KiCad project lives in the c-/ESP-AHT10-Extra repository on GitHub; these links point at the commit this page was built from.

ESP-AHT10-Extra: common questions

What microcontroller does the ESP-AHT10-Extra use?

The ESP-AHT10-Extra is built around the ESP-12, from the ESP8266 family.

How big is the ESP-AHT10-Extra PCB?

The ESP-AHT10-Extra measures 38.3 × 20.8 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the ESP-AHT10-Extra?

26 components, from 15 distinct parts. The full bill of materials is listed on this page.

Where can I download the ESP-AHT10-Extra design files?

From the c-/ESP-AHT10-Extra repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the ESP-AHT10-Extra design in my own project?

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

Can I test firmware for the ESP-AHT10-Extra without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP8266 firmware against it before you order a PCB.

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