4 layers31 × 40 mm
OSS Radio 2M70CM
Arkos-Engineering/HT-15_hardware
We can split this out into separate repos later, right now its very convenient to have everything here.
112 parts72
4 layers55 × 100.5 mm
OSS Radio Hardware Design
Arkos-Engineering/HT-15_hardware72We can split this out into separate repos later, right now its very convenient to have everything here.
- Size
- 55 × 100.5 mm
- Copper layers
- 4
- Thickness
- 1.57 mm
- Parts
- 256
- Nets
- 157
- Pads
- 786
- Tracks, vias
- 2,332, 378
- Pours
- 27
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 11 Mar 2025
- Updated
- 1 May 2026
Overview
OSS Radio Hardware Design is an open-source printed circuit board by Arkos-Engineering, from the Arkos-Engineering/HT-15_hardware repository on GitHub. It is a 4-layer board of 55 × 100.5 mm with 256 parts on 157 nets, routed with 2,332 tracks and 378 vias.
It is built around the AP63203WU, MX25L25645GM2I-08G and W25Q128JVSIQ, with the AMS1117-1.8, MCP73844-820I/MS and P091S-FC20BR10K among its other parts. Its parts include 70 capacitors, 53 diodes, 44 resistors, 10 ICs and 9 connectors. It belongs with the radio and wireless boards and the RP2350 boards of this library.
Main components
12
AP63203WU
TSOT-23-6-40℃~+85℃@(TA) 1 1.1MHz 22uA 2A 3.3V 3.8V~32V Buck Built-in Fixed Overcurrent Protection、Light load efficient mode、Cycle-by-cycle current limiting、Hiccup current limiting、EMI optimization (spread spectrum) Step-down type Yes TSOT-23-6 DC-DC Converters ROHSDiodes IncorporatedDC-DC Converters
MX25L25645GM2I-08G
SOP-8-208mil-40℃~+85℃ 100,000 cycles 120MHz 2.7V~3.6V 20 Years 256Mbit 750us SPI SOP-8-208mil NOR FLASH ROHSMXICNOR FLASH
W25Q128JVSIQ
SOIC-8-208mil-40℃~+85℃ 100,000 cycles 120ms@(32KB) 128Mbit 133MHz 1uA 2.7V~3.6V 20 Years 3ms Power-on reset、Hardware write protection、Software write protection、Write enable latch、Absolute write protection SPI SOIC-8-208mil NOR FLASH ROHSWinbondNOR FLASH
AMS1117-1.8
SOT-223-40℃~+125℃@(Tj) 0.003%Vout 1 1.3V@(1A) 1.8V 15V 1A 72dB@(120Hz) Fixed Positive Short Circuit Protection、Thermal shutdown SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
MCP73844-820I/MS
MSOP-8-40℃~+85℃ 2 551mA 8.2V 8.7V~12V Linear Charging IC Lithium-ion/Polymer MSOP-8 Battery Management ROHSMicrochip TechnologyBattery ManagementP091S-FC20BR10K
THroughhole10kΩ 50mW ±20% THroughhole Potentiometers, Variable Resistors ROHSTT ElectronicsPotentiometers & Variable Resistors
SPH0645LM4H-B
SMDSMD Sourcing Parts ROHSKnowlesMEMS Microphones
1N4148WS
SOD-3231.25V@150mA 100V 150mA 1uA@75V 200mW 2A 4ns Independent SOD-323 Switching Diodes ROHSJiangsu Changjing Electronics Technology (CJ)Switching Diodes
ESD9B3.3ST5G
SOD-923(0402)ESD And Surge Protection (TVS/ESD)TECH PUBLIC
TS-1187A-B-A-B
SMD-4P,5.1x5.1mm-30℃~+85℃ 1.5mm 1.6N 100,000 cycles 12V 5.1mm 5.1mm 50mA Gold No Round Button SPST Surface Mount,Vertical Without Bracket SMD-4P,5.1x5.1mm Tactile Switches ROHSXKB ConnectionTactile Switches
B340
SMC(DO-214AB)-55℃~+150℃ 1 Independent 100A 3A 40V 500mV@3A 500uA@40V SMC(DO-214AB) Schottky Diodes ROHSDiodes IncorporatedSchottky Diodes
AO3401A
SOT-231 P-Channel 14nC@10V 30V 47mΩ@10V、60mΩ@4.5V、85mΩ@2.5V 4A 55pF 645pF 80pF 900mV SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs
README
Readme.mdHT-15
What will set this radio apart from competitors is:
Fully open source, hardware and software Swappable radio module, allowing easy hardware upgradability (2M/70CM at launch) USBC charge and data, SD card, Kenwood style audio connector, removable battery Low-power E-ink display targeting 72+ hour standby time FM and M17 support at launch, with plans to support many other digital modes in the future such as DMR, P25 (depending on codec licensing) Ability for community to write and easily install “apps” that allow custom features or arbitrary digital mode development Usable “off the shelf”. We will be selling the radio as a complete unit (not just a devboard) Target price between $200 and $300, Selling all individual parts on our website for repairability
Our Website: arkosengineering.com Our Youtube: youtube.com/@ArkosEngineering Help fund development: buymeacoffee.com/arkosengineering
Notes
Parts
256| Qty | Value | Footprint | References |
|---|---|---|---|
| 30 | 100n | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C1, C10, C11, C12, C13, C14, C17, C18, C37, C38, C41, C47, C52, C55, C59, C61 +14 |
| 25 | TestPoint | TestPoint:TestPoint_Pad_D1.0mm | TP10, TP11, TP12, TP13, TP14, TP15, TP16, TP17, TP19, TP20, TP21, TP22, TP26, TP27, TP28, TP29 +9 |
| 23 | 1N4148WS | Diode_SMD:D_SOD-323 | D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23, D24, D25 +7 |
| 22 | ESD9B3.3ST5G | Diode_SMD:D_SOD-923 | D31, D33, D34, D35, D36, D37, D38, D39, D40, D41, D42, D43, D44, D45, D46, D47 +6 |
| 20 | TS-1187A-B-A-B | Button_Switch_SMD:SW_Push_1P1T_XKB_TS-1187A | SW_*1, SW_#1, SW_0, SW_1, SW_2, SW_3, SW_4, SW_5, SW_6, SW_7, SW_8, SW_9, SW_BACK1, SW_BOOTSEL1, SW_DOWN1, SW_ENTER1 +4 |
| 17 | 4.7u | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C2, C3, C4, C16, C39, C53, C54, C58, C60, C63, C64, C65, C69, C70, C78, C96 +1 |
| 13 | 1u | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C26, C27, C28, C29, C30, C31, C32, C33, C34, C35, C36, C51, C62 |
| 11 | 5k1 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R8, R9, R19, R21, R22, R28, R42, R43, R44, R45, R46 |
| 8 | 1k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R3, R6, R7, R24, R38, R39, R40, R49 |
| 7 | 10k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R14, R15, R36, R37, R47, R54 |
| 6 | 47u | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C40, C42, C72, C79, C90, C99 |
| 6 | B340 | Diode_SMD:D_SMA | D30, D54, D55, D56, D57, D58 |
| 4 | 100 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R10, R11, R20, R51 |
| 4 | 100k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R17, R23, R26, R29 |
| 4 | MountingHole | MountingHole:MountingHole_2.2mm_M2 | H1, H2, H3, H4 |
| 4 | MountingHole | MountingHole:MountingHole_2.2mm_M2_ISO14580 | H5, H6, H7, H8 |
| 3 | 0 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R16, R50, R52 |
| 3 | 15p | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C15, C19, C43 |
| 3 | 1825027-8 | Button_Switch_THT:SW_Tactile_SPST_Angled_PTS645Vx58-2LFS | SW_PTT1, SW_SIDE1, SW_SIDE2 |
| 3 | 27 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R2, R4, R5 |
| 2 | 27k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R18, R27 |
| 2 | 3.3u | Inductor_SMD:L_0805_2012Metric_Pad1.15x1.40mm_HandSolder | L1, L4 |
| 2 | AO3401A | Package_TO_SOT_SMD:SOT-23 | Q2, Q7 |
| 2 | RF_GND | TestPoint:TestPoint_Pad_D2.5mm | TP2, TP3 |
| 2 | RF_VBAT | TestPoint:TestPoint_Pad_D2.5mm | TP1, TP4 |
| 1 | 0.1 | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R25 |
| 1 | 100p | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C49 |
| 1 | 1u | Inductor_SMD_Wurth:L_Wurth_WE-LQSH-4020 | L3 |
| 1 | 2.2 1% | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R13 |
| 1 | 47u | CDRH2D18_LDNP-470NC:CDRH2D18_LDNP-470NC | L2 |
| 1 | ABM8-272-T3 | Crystal:Crystal_SMD_Abracon_ABM8G-4Pin_3.2x2.5mm | Y1 |
| 1 | AMS1117-1.8 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U13 |
| 1 | AO3400A | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | AP63203WU | Package_TO_SOT_SMD:TSOT-23-6 | U4 |
| 1 | Batt_Conn | TestPoint:TestPoint_2Pads_Pitch2.54mm_Drill0.8mm | J9 |
| 1 | DF40C2.0-24DS-0.4V51 | DF40C-24DS:CONN24_DF40C-2-24DS_HIR | J5 |
| 1 | FH12-24S-0.5SH(55) | Connector_FFC-FPC:Hirose_FH12-24S-0.5SH_1x24-1MP_P0.50mm_Horizontal | J3 |
| 1 | LED_Charge | Diode_SMD:D_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D26 |
| 1 | LED_STATUS | Diode_SMD:D_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D32 |
| 1 | LM5157RTER | LM5157:QFN_57RTER_TEX-M | U10 |
| 1 | MCP73844-820I/MS | MCP73844:MSOP8_MC_MCH-M | U9 |
| 1 | MEM2061-01-188-00-A_REVA | MEM2061:GCT_MEM2061-01-188-00-A_REVA | J4 |
| 1 | MIC_3.5MM PJ-307C | Connector_Audio:Jack_3.5mm_CUI_SJ1-3525N_Horizontal | J8 |
| 1 | MX25L25645GM2I-08G | Package_SO:SOIC-8_5.3x5.3mm_P1.27mm | U5 |
| 1 | P091S-FC20BR10k | P091S:P091S-FC20BR10K | U11 |
| 1 | PEC09-2120F-S0012 | PEC09-2120F-S0012:PEC09-2120F-S0012 | SW1 |
| 1 | RP2350B-QFN80 | Package_DFN_QFN:QFN-80-1EP_10x10mm_P0.4mm_EP3.4x3.4mm | U7 |
| 1 | SPH0645LM4H | Sensor_Audio:Knowles_SPH0645LM4H-6_3.5x2.65mm | U8 |
| 1 | SPK_2.5MM SJ1-2503A | SJ1-2503A:SAMESKY_SJ1-2503A | J7 |
| 1 | SPK_CONN_INT | Connector_JST:JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal | J6 |
| 1 | SWD Debug | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J1 |
| 1 | TLV320AIC3100 | Package_DFN_QFN:VQFN-32-1EP_5x5mm_P0.5mm_EP3.5x3.5mm | U12 |
| 1 | USB4105 | Connector_USB:USB_C_Receptacle_G-Switch_GT-USB-7010ASV | J2 |
| 1 | V_CHG | TestPoint:TestPoint_Pad_D1.0mm | TP5 |
| 1 | W25Q128JVS | Package_SO:SOIC-8_5.3x5.3mm_P1.27mm | U1 |
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Questions
How big is the OSS Radio Hardware Design PCB?
It measures 55 × 100.5 mm and has 4 copper layers, 1.57 mm thick.
What parts does the OSS Radio Hardware Design use?
256 parts, built around the AP63203WU, MX25L25645GM2I-08G, W25Q128JVSIQ and AMS1117-1.8. 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 OSS Radio Hardware Design KiCad files?
From the Arkos-Engineering/HT-15_hardware repository on GitHub, at the commit this page was made from: the board is hardware/KiCad Main Board/OSS Radio Hardware Design.kicad_pcb and its schematic hardware/Battery/Radio Interface/Radio Interface.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the OSS Radio Hardware Design design in my own project?
Its repository states no licence, so its author keeps all rights: ask Arkos-Engineering before reusing the design.