Belle
About the Belle PCB
Belle is an open source ESP8266 PCB design by sayanee, published on GitHub. It is a 2-layer board measuring 44.5 × 44.5 mm, with 24 components from 19 distinct parts.
Its main chip is the ESP12, from the ESP8266 family. Other key parts include the SN74AHC1G14DBVR and AP2112. By type, the board carries 9 resistors, 7 capacitors, 4 connectors and 3 ICs.
From the project
:bell: door bell that will buzz on press and send a mobile notification with IFTTT
A list of connectivity checks after soldering
- [x] R3, R6, R7, R8 - [x] C2, C3 - [x] SP1 long pin - [x] P1 pin 1 - [x] U1 pin 6 - [x] U3pin 5
- [x] R1, R5 - [x] C1, C2, C3, C4, C5, C6, C7 - [x] P2 Bell connector - [x] P3 FTDI connector - [x] P4 Boot jumper
- [x] P2 - [x] C4, C7 - [x] U3 pins 1 and 3
- [x] U1, U2 ESP8266, U3 - [x] SP1 - [x] P1, P2, P3, P4
Main components on the Belle
Belle bill of materials (BOM)
24 components, 19 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | SN74AHC1G14DBVR 74AHC1G14 | SOT-23-5_HandSoldering | U1 |
| 1 | ESP12 ESP-12 | ESP-12F-SMD | U2 |
| 1 | AP2112 | SOT-23-5_HandSoldering | U3 |
| 1 | MA522-500M02 Bell CONN | TerminalBlock_Pheonix_MKDS1.5-2pol | P1 |
| 1 | Battery CONN | Pin_Header_Straight_1x02_Pitch2.54mm | P2 |
| 1 | FTDI Flashing CONN | Pin_Header_Straight_1x06_Pitch2.54mm | P3 |
| 1 | Boot JUMPER | Pin_Header_Straight_1x02_Pitch2.54mm | P4 |
| 1 | ABI-050-RC BUZZER | prosignal_buzzer | SP1 |
| 2 | MCSH31B105K160CT 1u | C_1206_HandSoldering | C1, C3 |
| 1 | GRM31CR70J106KA01L DNP | C_1206_HandSoldering | C2 |
| 1 | MCSH31B105K160CT DNP | C_1206_HandSoldering | C4 |
| 1 | 10u | C_1206_HandSoldering | C5 |
| 1 | DNP | C_1206_HandSoldering | C6 |
| 1 | 1u | C_1206_HandSoldering | C7 |
| 1 | RK73H2BTTD2202F 22k | R_1206_HandSoldering | R1 |
| 1 | ERJ8ENF5102V 47k | R_1206_HandSoldering | R2 |
| 4 | MC1206S4F1002T5E 10K | R_1206_HandSoldering | R3, R5, R6, R7 |
| 2 | CRG1206ZR 0R | R_1206_HandSoldering | R4, R8 |
| 1 | 0R | R_1206_HandSoldering | R9 |
Belle design files
The KiCad project lives in the sayanee/belle repository on GitHub; these links point at the commit this page was built from.
Belle: common questions
What microcontroller does the Belle use?
The Belle is built around the ESP12, from the ESP8266 family.
How big is the Belle PCB?
The Belle measures 44.5 × 44.5 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Belle?
24 components, from 19 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 Belle design files?
From the sayanee/belle repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the Belle design in my own project?
The repository has no license, so all rights stay with sayanee. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Belle 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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