2 layers148 × 81 mm
Communicator pcb
Hack-a-Day/2025-Communicator_Badge
The 2025 Hackaday Supercon RF Communicator Badge
58 parts107MIT
4 layers72 × 98.4 mm
Calculator
FazalThe/ZenkoAn open-source modern calculator with camera capability
- Size
- 72 × 98.4 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 120
- Nets
- 117
- Pads
- 463
- Tracks, vias
- 275, 0
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 15 Feb 2026
- Updated
- 31 Mar 2026
Overview
Calculator is an open-source printed circuit board by FazalThe, from the FazalThe/Zenko repository on GitHub. It is a 4-layer board of 72 × 98.4 mm with 120 parts on 117 nets, routed with 275 tracks and 0 vias.
It is built around the ESP32-S3-WROOM-1-N8 and AP2112K-3.3. Its parts include 47 diodes, 9 capacitors, 7 resistors, 4 ICs and 1 connector. It belongs with the ESP32 boards of this library.
Main components
2
ESP32-S3-WROOM-1-N8
SMD,25.5x18mm-40℃~+85℃ -98.2dBm 2.4GHz 20.5dBm 355mA 3V~3.6V 95mA Bluetooth5.0 ESP32-S3 Chip On-board PCB Antenna UART、SPI、I2C、I2S、USB SMD,25.5x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
AP2112K-3.3
SOT253.3V 600mA CMOS Low Dropout Linear Regulator with EnableDiodes IncorporatedUncategorised
README
README.mdZenko Calculator
A custom-built opensource scintific calculator with built in camera. Code it to make it do what ever you want.
Hardware Overview
- MCU : ESp-32-S3-WROOM-1
- I/O Expander : MCP23107
- Camera : OV2640
- Display : TBD
📐 Schematics
Schematic 1
Schematic 2
Schematic 3
Schematic 4
🧾 PCB Layout
⚙️ Firmware
To be Done
BOM
To be finalized
Parts
120| Qty | Value | Footprint | References |
|---|---|---|---|
| 48 | SW_Push | My:SW_TL3342F160QG | Boot1, Reset1, SW1, SW2, SW10, SW11, SW12, SW13, SW14, SW15, SW16, SW17, SW18, SW19, SW20, SW21 +32 |
| 46 | D | Diode_SMD:D_SOD-123 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +30 |
| 3 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5, R6, R7 |
| 3 | 10uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C4, C7, C8 |
| 2 | 0.1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3, C9 |
| 2 | 1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C5, C6 |
| 2 | 4.7uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2 |
| 2 | 5.1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3, R4 |
| 2 | Conn_01x01_Pin | Connector_Wire:SolderWirePad_1x01_SMD_1x2mm | BT-1, BT+1 |
| 1 | 4.7k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 1 | 470 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2 |
| 1 | AP2112K-3.3 | Package_TO_SOT_SMD:SOT-23-5 | U1 |
| 1 | Conn_01x04_Pin | Connector_JST:JST_PH_S4B-PH-K_1x04_P2.00mm_Horizontal | Display1 |
| 1 | Conn_01x24 | Connector_FFC-FPC:Hirose_FH12-24S-0.5SH_1x24-1MP_P0.50mm_Horizontal | Cam1 |
| 1 | ESP32-S3-WROOM-1 | PCM_Espressif:ESP32-S3-WROOM-1 | U3 |
| 1 | LED | LED_SMD:LED_0201_0603Metric | D57 |
| 1 | MCP23017_SO | Package_SO:SOIC-28W_7.5x17.9mm_P1.27mm | U4 |
| 1 | MCP73831-2-OT | Package_TO_SOT_SMD:SOT-23-5 | U2 |
| 1 | USB_C_Receptacle_USB2.0_14P | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1 |
Questions
How big is the Calculator PCB?
It measures 72 × 98.4 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Calculator use?
120 parts, built around the ESP32-S3-WROOM-1-N8 and AP2112K-3.3. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Calculator KiCad files?
From the FazalThe/Zenko repository on GitHub, at the commit this page was made from: the board is PCB/Calculator.kicad_pcb and its schematic PCB/Calculator.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Calculator design in my own project?
Its repository states no licence, so its author keeps all rights: ask FazalThe before reusing the design.
Similar boards
- 2 layers
Insta360-joystick
jfwoods/insta360link-controller
A lightweight daemon, CLI tool, and (optional) firmware + hardware for controlling an Insta360 Link webcam without the first-party software.
58 parts9 - 4 layers108.6 × 87.7 mm
Blinky badge light
rowr111/blinky-badge-light
lighting badge with unique patterns and sound reactivity
123 parts9MIT - 2 layers35 × 50 mm
Imu rc hand unit
DimitriOnLSD/imu-rc
Gesture-based RC car controller using ESP32-S3, BLE, LSM6DSO IMU, OLED display, and LiPo battery with USB-C charging.
76 parts7MIT - 4 layers60 × 60 mm
- 2 layers51.1 × 95 mm
Talk e
milovanpms/talk-e
📻 — A simple LoRa-based talkie-walkie built on ESP32, operating on the 433 MHz frequency band for long-range, low-power wireless communication.
75 parts4 - 2 layers33 × 50 mm
Hema console
rapha-tech/ESP32-hema-console
New PCB for the small console from hema to use an ESP32
59 parts4 - 2 layers44.7 × 93.6 mm
