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RatGDO-OpenSource-Bare-ESP8266

scottdube·my-rat-ratgdo·kicad_files/Bare ESP8266/RatGDO-OpenSource-Bare-ESP8266.kicad_pcb

RatGDO-OpenSource-Bare-ESP8266 PCB layout, top view — open source ESP8266 board by scottdube

About the RatGDO-OpenSource-Bare-ESP8266 PCB

RatGDO-OpenSource-Bare-ESP8266 is an open source ESP8266 PCB design by scottdube, published on GitHub under the MIT license. It is a 2-layer board measuring 55 × 82.7 mm, with 20 components from 13 distinct parts.

Its main chip is the ESP-12F, from the ESP8266 family. Other key parts include the LM2596 DC-DC Converter. By type, the board carries 8 resistors, 6 connectors, 2 ICs, 2 transistors, 1 switch and 1 capacitor.

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

From the project

DIY local Security+ 2.0 garage control for Home Assistant — my rat-ratgdo (D1 Mini ESP32) variant: on-board LM2596, battery-backup tap, SHT3x temp/humidity, and a piezo buzzer.

I started from Kaldek's D1 Mini – ESP32 variant and added four things aimed at making the board a self-sufficient, locally-controlled garage controller that keeps working through a power outage:

- SHT3x temp/humidity sensor (I²C, addr 0x44, SDA GPIO18 / SCL GPIO19). Garage climate in Home Assistant for free — freeze/heat alerts, humidity logging — with no second device. Brought out on a JST header to a remote breakout so the sensor isn't skewed by board or enclosure heat. - 12 V piezo buzzer driver (2N7002 on GPIO17). Local audible feedback — door-left-open nag, closing warning — that…

RatGDO-OpenSource-Bare-ESP8266, from the project README
From the project README

Main components on the RatGDO-OpenSource-Bare-ESP8266

ESP-12FLM2596 DC-DC Converter

RatGDO-OpenSource-Bare-ESP8266 bill of materials (BOM)

20 components, 13 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ESP-12F
U1
1
LM2596 DC-DC Converter
U2
1
2N7002
Q1
1
AO3400A
Q2
1
Screw_Terminal_01x03
J1
1
Screw_Terminal_01x03
J2
1
Screw_Terminal_01x03
J3
1
Conn_01x04
J4
1
Screw_Terminal_01x02
J5
1
Conn_01x02
J6
1
SW_Push
SW1
1
0.1uf
C1
8
10k
R1, R2, R3, R4, R5, R6, R7, R8

RatGDO-OpenSource-Bare-ESP8266 design files

The KiCad project lives in the scottdube/my-rat-ratgdo repository on GitHub; these links point at the commit this page was built from.

RatGDO-OpenSource-Bare-ESP8266: common questions

What microcontroller does the RatGDO-OpenSource-Bare-ESP8266 use?

The RatGDO-OpenSource-Bare-ESP8266 is built around the ESP-12F, from the ESP8266 family.

How big is the RatGDO-OpenSource-Bare-ESP8266 PCB?

The RatGDO-OpenSource-Bare-ESP8266 measures 55 × 82.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the RatGDO-OpenSource-Bare-ESP8266?

20 components, from 13 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 RatGDO-OpenSource-Bare-ESP8266 design files?

From the scottdube/my-rat-ratgdo repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the RatGDO-OpenSource-Bare-ESP8266 design in my own project?

Yes, under the terms of its MIT license, which scottdube chose for the repository.

Can I test firmware for the RatGDO-OpenSource-Bare-ESP8266 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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