PCB Design
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These are the parts necessary for this project:
USB TTL adapter
NodeMCU or Wemos D1 Mini
Logic level converter from 3.3V to 5V
WS2812B LED strip
JST 3 pin female connector
5V 2-10A power supply v1 or 5V 2-10A power supply v2
Jumper cables
I've designed a simple PCB for ESP8266 boards.
The board dimensions are 38mm x 26mm, and compatible with ESP-12E/F and ESP-07S boards.
2019-10-10 I've updated the PCB design, now its little smaller and also has two holes for M3 screws, also the power adaptor is hangs from the board (better for 3D printed case)!
2019-11-26 PCB design v2.0.x! This one is bigger and has holes screws, also the power adaptor is hangs from the board and now it has 5V output if needed!
Note: For controlling the LED strip, this module uses GPIO3 (same pin as RXD on Wemos D1 Mini). If You are using Wemos D1 Mini or any ESP8266 board, you must have to use a logic level shifter. ESP8266 chips are using 3.3V logic, but - reference to the WS2812B's datasheet - the LED strip's data line using 5V logic with minimum of 3.5V. Without the logic level shifter the LED strip may not work properly or could be damaged!
Download v2.0.x files from here!
ESP12F/E
SMD 0805 resistors
SMD 0805 capacitors
AMS1117-3.3
SMD button
2.54mm header
BSS138
SMD 8x10.5 1000uF capacitor
DC connector
| Prefix | Value | Package |
|---|---|---|
| R1 | 10K Ω | SMD 0805 |
| R2 | 10K Ω | SMD 0805 |
| R3 | 10K Ω | SMD 0805 |
| R4 | 10K Ω | SMD 0805 |
| C1 | 100nF | SMD 0805 |
| C2 | 10uF | SMD 0805 |
| C3 | 10uF | SMD 0805 |
| C4 | 100nF | SMD 0805 |
| C5 | 10V 1000uF | SMD 8x10 |
| IC1 | AMS1117-3.3 | SOT223 |
| Q1 | BSS138 | SOT23-3 |
| U1 | DC adapter | 5.5x2.1mm jack |
| Reset | Tactile Touch Key | SMD 6.1x3.7mm |
| Serial | 2.54mm 4P header | (optional) |
| WS2812B | JST 3 pin female | WS2812b connector |
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