HardLabs

ESPTiny

tomtor·ESPTiny

ESPTiny PCB layout, top view — open source ESP8266 board by tomtor

About the ESPTiny PCB

ESPTiny is an open source ESP8266 PCB design by tomtor, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 33 × 26.4 mm, with 16 components from 13 distinct parts.

Its main chip is the ESP-01v090, from the ESP8266 family. Other key parts include the ATtiny84-20PU and MCP1700-3302E_TO92. By type, the board carries 5 resistors, 3 ICs, 3 connectors, 3 capacitors and 2 diodes.

It belongs with the power & battery designs in this gallery.

From the project

KiCad ATtiny84/x14/x02 (SMD) and ESP-01 (ESP 8266) PCB boards

The main function of the ATtiny is acting as a battery friendly low power co-processor for the ESP. A bit like the ULP low power co-processor of the ESP32, except with a lot more IO functions and program memory.

ATtiny and ESP combined use 22uA in sleep mode or even less when the ESP is switched off by the ATtiny with CS.

Usable on breadboard (ATtiny84: 9 rows high, leaves 2 rows empty and ATtiny16x4: 8 rows high) OR stand alone.

ESPTiny, from the project README
From the project README

Main components on the ESPTiny

ESP-01v090ATtiny84-20PUMCP1700-3302E_TO92

ESPTiny bill of materials (BOM)

16 components, 13 distinct parts.

QtyPartRefs
1
ESP-01v090
U1
1
ATtiny84-20PU
U2
1
MCP1700-3302E_TO92
U3
2
Conn_01x10_Male
J1, J2
1
Conn_01x04_Male
J3
1
LED
D1
1
BAT85
D2
1
1u
C1
1
100u
C2
1
100n
C3
1
220
R1
2
1M
R2, R3
2
4k7
R4, R5

ESPTiny design files

The KiCad project lives in the tomtor/ESPTiny repository on GitHub; these links point at the commit this page was built from.

ESPTiny: common questions

What microcontroller does the ESPTiny use?

The ESPTiny is built around the ESP-01v090, from the ESP8266 family.

How big is the ESPTiny PCB?

The ESPTiny measures 33 × 26.4 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the ESPTiny?

16 components, from 13 distinct parts. The full bill of materials is listed on this page.

Where can I download the ESPTiny design files?

From the tomtor/ESPTiny repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the ESPTiny design in my own project?

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

Can I test firmware for the ESPTiny 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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