4 layers267 × 75 mm
Fracture
SharKingStudios/Fracture
An infinitely expandable, velocity sensing split midi keyboard.
208 parts10MIT
2 layers100 × 60 mm
FotHunt
UnHolds/FoxHunt- Size
- 100 × 60 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 87
- Nets
- 79
- Pads
- 325
- Tracks, vias
- 543, 118
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 25 Feb 2026
- Updated
- 12 Mar 2026
Overview
FotHunt is an open-source printed circuit board by UnHolds, from the UnHolds/FoxHunt repository on GitHub. It is a 2-layer board of 100 × 60 mm with 87 parts on 79 nets, routed with 543 tracks and 118 vias.
It is built around the LM324, AMS1117-3.3 and PJ-320D. Its parts include 24 resistors, 19 capacitors, 11 connectors, 7 diodes and 7 switches. It belongs with the STM32 boards of this library.
Main components
3
LM324
SOP-14-1.5V~10V 0℃~+70℃ 24V 250nA 3V~20V 4 40mA 50nA 700uA 7mV 80dB SOP-14 Operational Amplifier ROHSHXY MOSFETOperational Amplifier
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
PJ-320D
SMD-30℃~+70℃ 12V 1A 3.5mm Headphone Jack Copper Gold SMD Audio Connectors ROHSSHOU HANAudio Connectors
Parts
87| Qty | Value | Footprint | References |
|---|---|---|---|
| 14 | 1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R18, R22 |
| 10 | 100n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2, C3, C4, C5, C9, C14, C15, C16, C17, C19 |
| 5 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R16, R19, R20, R21 |
| 2 | 10p | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C10, C11 |
| 2 | 10u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C18 |
| 2 | 1u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C7, C8 |
| 2 | 22u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C12, C13 |
| 2 | 5k1 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4, R24 |
| 2 | 680 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R17, R23 |
| 2 | PJ-320D | easyeda2kicad:AUDIO-SMD_PJ-320D-1 | CN1, CN2 |
| 1 | 1.8V | TestPoint:TestPoint_Pad_D3.0mm | TP5 |
| 1 | 10n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C6 |
| 1 | 120R | Inductor_SMD:L_0805_2012Metric_Pad1.05x1.20mm_HandSolder | FB1 |
| 1 | 16MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm_HandSoldering | Y1 |
| 1 | 1k5 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U2 |
| 1 | After Filter | TestPoint:TestPoint_Pad_D3.0mm | TP3 |
| 1 | Audio ADC | TestPoint:TestPoint_Pad_D3.0mm | TP4 |
| 1 | Audio In | TestPoint:TestPoint_Pad_D3.0mm | TP2 |
| 1 | Audio Out | TestPoint:TestPoint_Pad_D3.0mm | TP8 |
| 1 | Audio_Afer_Poti | TestPoint:TestPoint_Pad_D3.0mm | TP1 |
| 1 | CW After HP | TestPoint:TestPoint_Pad_D3.0mm | TP7 |
| 1 | CW Chip Out | TestPoint:TestPoint_Pad_D3.0mm | TP6 |
| 1 | Chip PTT Key | TestPoint:TestPoint_Pad_D3.0mm | TP9 |
| 1 | GPIO | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J5 |
| 1 | I2C1 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J1 |
| 1 | LED_CW | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D7 |
| 1 | LED_DTMF | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D6 |
| 1 | LED_STATUS_1 | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D2 |
| 1 | LED_STATUS_2 | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D3 |
| 1 | LED_STATUS_3 | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D4 |
| 1 | LED_STATUS_4 | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D5 |
| 1 | LM324 | Package_DIP:DIP-14_W7.62mm | U3 |
| 1 | LOGO | LOGO | G*** |
| 1 | PC817 | Package_DIP:DIP-4_W7.62mm | U4 |
| 1 | PTT Key | TestPoint:TestPoint_Pad_D3.0mm | TP10 |
| 1 | RED PWR LED | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1 |
| 1 | R_Poti_Audio_Lvl | easyeda2kicad:RES-TH_RK09K1130A70 | RV1 |
| 1 | Radio Audio In | Connector_PinHeader_2.54mm:PinHeader_2x06_P2.54mm_Vertical | J9 |
| 1 | Radio Audio Out | Connector_PinHeader_2.54mm:PinHeader_2x06_P2.54mm_Vertical | J8 |
| 1 | Radio GND | Connector_PinHeader_2.54mm:PinHeader_2x06_P2.54mm_Vertical | J12 |
| 1 | Radio PTT | Connector_PinHeader_2.54mm:PinHeader_2x06_P2.54mm_Vertical | J10 |
| 1 | SPI1 | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J3 |
| 1 | STM32F103C8Tx | Package_QFP:LQFP-48_7x7mm_P0.5mm | U1 |
| 1 | SWD | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J4 |
| 1 | SW_BOOT | easyeda2kicad:SW-SMD_MK-12C02-G020 | SW1 |
| 1 | SW_Calibrate | Button_Switch_SMD:SW_SPST_B3S-1000 | SW5 |
| 1 | SW_DTMF_TH_DOWN | Button_Switch_SMD:SW_SPST_B3S-1000 | SW7 |
| 1 | SW_DTMF_TH_UP | Button_Switch_SMD:SW_SPST_B3S-1000 | SW6 |
| 1 | SW_Prog_Select | Button_Switch_SMD:SW_SPST_B3S-1000 | SW3 |
| 1 | SW_Prog_Switch | Button_Switch_SMD:SW_SPST_B3S-1000 | SW4 |
| 1 | SW_RST | Button_Switch_SMD:SW_SPST_B3S-1000 | SW2 |
| 1 | TYPE-C 16PIN 2MD(073) | easyeda2kicad:USB-C-SMD_TYPE-C-6PIN-2MD-073 | USB1 |
| 1 | UART2 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J2 |
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Questions
How big is the FotHunt PCB?
It measures 100 × 60 mm and has 2 copper layers, 1.6 mm thick.
What parts does the FotHunt use?
87 parts, built around the LM324, AMS1117-3.3 and PJ-320D. 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 FotHunt KiCad files?
From the UnHolds/FoxHunt repository on GitHub, at the commit this page was made from: the board is FoxHuntPCB/FotHunt.kicad_pcb and its schematic FoxHuntPCB/FotHunt.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the FotHunt design in my own project?
Its repository states no licence, so its author keeps all rights: ask UnHolds before reusing the design.