6 layers153.3 × 53 mm
SCAN
jjsprandel/SCAN_PCB
Welcome to the SCAN repository! Below, you will find all the necessary information, from hardware design to software documentation.
186 parts1
4 layers101.6 × 97.2 mm
HeartToHeart
AlexanderRoller/heartToHeartHeartToHeart is a hardware project designed for IoT prototyping, featuring a custom PCB and ESP32 microcontroller.
- Size
- 101.6 × 97.2 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 61
- Nets
- 90
- Pads
- 296
- Tracks, vias
- 485, 65
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 4 Jun 2025
- Updated
- 4 Jun 2025
Overview
HeartToHeart is an open-source printed circuit board by AlexanderRoller, from the AlexanderRoller/heartToHeart repository on GitHub. It is a 4-layer board of 101.6 × 97.2 mm with 61 parts on 90 nets, routed with 485 tracks and 65 vias.
It is built around the ESP32-C6-MINI-1U-H4, WS2812B and 1N4148W, with the BC847BDW1 and NHD-C12832A1Z-FSW-FBW-3V3 among its other parts. Its parts include 21 diodes, 16 capacitors, 11 resistors, 3 ICs and 2 connectors. It belongs with the ESP32 and RISC-V boards of this library.
Main components
5
ESP32-C6-MINI-1U-H4
SMD,13.2x12.5mm-105.5dBm -40℃~+105℃ 2.4GHz 20.5dBm 382mA 3V~3.6V 73mA ESP32-C6FH4 Integrated Bluetooth function、Integrated Zigbee function、Support USB interface UART、SDIO、SPI、I2C、GPIO、USB SMD,13.2x12.5mm WiFi Modules ROHSEspressif SystemsWiFi Modules
WS2812B
5mm X 5mm Surface Mount RGB LED with Intelligent ControlWorldsemiUncategorised
1N4148W
SOD-123150mA 1A 1V@50mA 1uA@75V 400mW 4ns 75V Independent SOD-123 Switching Diodes ROHSSTMicroelectronicsSwitching Diodes
BC847BDW1
SOT-363-55℃~+150℃ 100MHz 100mA 150 2 NPN 250mV 380mW 45V 5uA 6V NPN SOT-363 Bipolar (BJT) ROHSonsemiBipolar (BJT)NHD-C12832A1Z-FSW-FBW-3V3
Through holeThroughhole New Arrivals ROHSNewhaven DisplayUncategorised
README
README.mdHeartToHeart
HeartToHeart is a hardware project designed for IoT prototyping, featuring a custom PCB and ESP32 microcontroller. The project includes AWS IoT integration, a custom display, and a complete KiCad design for fabrication and assembly.
Features
- Custom PCB design (KiCad)
- ESP32 microcontroller
- AWS IoT Core connectivity
- OLED display (NHD-C12832A1Z-FSW-FBW-3V3)
- Example firmware for secure WiFi and AWS IoT connection
Directory Structure
pcb/– KiCad project files and backupssrc/– Firmware source code and secrets templatespcb/media/– Project images and schematic PDF
Getting Started
- Clone the repository
- Copy
src/secrets.example.htosrc/secrets.hand fill in your WiFi and AWS IoT credentials - Open
pcb/pcb.kicad_proin KiCad to view or modify the PCB - Generate your own fabrication files (Gerbers, drills, etc.) using KiCad's plot and export tools
- Flash the firmware in
src/src.inoto your ESP32
Images
PCB Layout
Schematic
License
See pcb/License.txt for licensing information.
Note: Do not commit your real src/secrets.h with credentials. Use src/secrets.example.h as a template.
Important: Fabrication files (Gerbers, drills, etc.) are not included in the repository. You must generate your own using the provided KiCad project files.
Parts
61| Qty | Value | Footprint | References |
|---|---|---|---|
| 15 | WS2812B | LED_SMD:LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm | D1, D6, D7, D8, D10, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21 |
| 10 | 1u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C6, C7, C8, C9, C10, C12, C13, C14, C15, C16 |
| 4 | 10K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5, R10, R12, R29 |
| 4 | 10u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C3, C4, C11 |
| 4 | MountingHole | MountingHole:MountingHole_2.5mm | H1, H2, H3, H4 |
| 3 | 5.1K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2, R25, R26 |
| 3 | D_TVS | Diode_SMD:D_SOD-523 | D2, D3, D4 |
| 2 | SW_Push | Button_Switch_SMD:SW_SPST_PTS647_Sx38 | SW1, SW2 |
| 1 | .1u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2 |
| 1 | 1N4148W | Diode_SMD:D_SOD-123 | D22 |
| 1 | 1N5819 | Diode_SMD:D_SOD-123 | D9 |
| 1 | 1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R16 |
| 1 | 22.1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R19 |
| 1 | 22u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C5 |
| 1 | 3.3K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R6 |
| 1 | 47.5k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 1 | AZ1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U3 |
| 1 | BC847BDW1 | Package_TO_SOT_SMD:SOT-363_SC-70-6_Handsoldering | Q1 |
| 1 | CP2102N-Axx-xQFN28 | Package_DFN_QFN:QFN-28-1EP_5x5mm_P0.5mm_EP3.25x3.25mm | U2 |
| 1 | Conn_01x02_Pin | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J5 |
| 1 | ESP32-C6-MINI-1/U | PCM_Espressif:ESP32-C6-MINI-1 | U1 |
| 1 | LED | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D5 |
| 1 | NHD-C12832A1Z-FSW-FBW-3V3 | Display:NHD-C12832A1Z-FSRGB | DS1 |
| 1 | USB_C_Receptacle_USB2.0_16P | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J1 |
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Questions
How big is the HeartToHeart PCB?
It measures 101.6 × 97.2 mm and has 4 copper layers, 1.6 mm thick.
What parts does the HeartToHeart use?
61 parts, built around the ESP32-C6-MINI-1U-H4, WS2812B, 1N4148W and BC847BDW1. 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 HeartToHeart KiCad files?
From the AlexanderRoller/heartToHeart repository on GitHub, at the commit this page was made from: the board is pcb/pcb.kicad_pcb and its schematic pcb/pcb.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the HeartToHeart design in my own project?
Its repository states no licence, so its author keeps all rights: ask AlexanderRoller before reusing the design.