Wiflier EXP
About the Wiflier EXP PCB
Wiflier EXP is an open source ESP8266 PCB design by cnlohr, published on GitHub under the MIT license. It is a 2-layer board measuring 37.8 × 21.5 mm, with 61 components from 42 distinct parts.
Its main chip is the ESP8266EX, from the ESP8266 family. Other key parts include the MCP1824/3.3, MCP1824/3.0, BMP280, LSM9DS1 and W25Q80DV. By type, the board carries 23 connectors, 12 capacitors, 7 ICs, 6 resistors, 5 diodes and 4 transistors.
It belongs with the robotics & motion, sensors and iot & wireless designs in this gallery.
From the project
ESP8266-based Quadcopter Brain
WARNING: This project is still in its early stages! It doesn't fly yet!
WARNING: Everything surrounding a control loop in control.c for flight IS SUPER JANKEY AND TOTALLY NOT HOW IT SHOULD BE!
WARNING: When I operated the PWM at 3kHz, I had to modify my current board to add pullups on the I2C and short out the AVR's reset to VBat, otherwise it seemed to reboot randomly during flight.
Main components on the Wiflier EXP
Wiflier EXP bill of materials (BOM)
61 components, 42 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | MCP1824/3.3 | SOT23-5 | U1 |
| 1 | MCP1824/3.0 | SOT23-5 | U2 |
| 1 | BMP280 | BMP280 | U3 |
| 1 | LSM9DS1 | LGA-24B | U4 |
| 1 | ESP8266EX | QFN32 | U5 |
| 1 | W25Q80DV | SO8E | U6 |
| 1 | ATTINY841-QFN | QFN20 | U7 |
| 4 | 7A_20V | SOT23GDS | Q1, Q2, Q3, Q4 |
| 1 | 26MHz | XTAL4P | X1 |
| 1 | 10p | NETWORK0606 | CN1 |
| 1 | GPIO2 | .1SMTPIN | P1 |
| 1 | M0 | SMT_1x2 | P2 |
| 1 | M1 | SMT_1x2 | P3 |
| 1 | M2 | SMT_1x2 | P4 |
| 1 | M3 | SMT_1x2 | P5 |
| 2 | ANT | .1SMTPIN | P6, P19 |
| 2 | ~ | HOLE-1.9MM | P7, P8 |
| 1 | SDA | .1SMTPIN | P9 |
| 1 | SCL | .1SMTPIN | P10 |
| 1 | 3V | .1SMTPIN | P11 |
Show 22 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | GND | .1SMTPIN | P12 |
| 3 | LED | .1SMTPIN | P13, P14, P15 |
| 1 | VAA | .1SMTPIN | P16 |
| 1 | TOUT | .1SMTPIN | P17 |
| 1 | PA0 | .1SMTPIN | P18 |
| 1 | B+ | .1SMTPIN | P21 |
| 1 | B- | .1SMTPIN | P24 |
| 1 | ESP_UART | SMT_1x6 | P32 |
| 4 | 20V_500mA | SM0805 | D1, D2, D3, D4 |
| 1 | LED- | SM0805 | D5 |
| 1 | - | SM0603 | FB1 |
| 2 | NP | SM0603 | L1, L2 |
| 4 | 10uF | SM0603 | C1, C2, C3, C5 |
| 1 | 1uF | SM0603 | C4 |
| 3 | .1u | SM0603 | C6, C8, C12 |
| 1 | .1uF | SM0603 | C7 |
| 1 | 10nF | SM0603 | C9 |
| 1 | 100uF | SM1206 | C10 |
| 1 | 5.6pF | SM0603 | C11 |
| 3 | 12k | SM0603 | R1, R2, R4 |
| 1 | NP | SM0603 | R5 |
| 2 | 1k | NETWORK0606 | RN1, RN2 |
Wiflier EXP design files
The KiCad project lives in the cnlohr/wiflier repository on GitHub; these links point at the commit this page was built from.
Wiflier EXP: common questions
What microcontroller does the Wiflier EXP use?
The Wiflier EXP is built around the ESP8266EX, from the ESP8266 family.
How big is the Wiflier EXP PCB?
The Wiflier EXP measures 37.8 × 21.5 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Wiflier EXP?
61 components, from 42 distinct parts. The full bill of materials is listed on this page.
Where can I download the Wiflier EXP design files?
From the cnlohr/wiflier repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Wiflier EXP design in my own project?
Yes, under the terms of its MIT license, which cnlohr chose for the repository.
Can I test firmware for the Wiflier EXP 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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