4 layers160 × 90 mm
4 layers99 × 64 mm
WSPR ease
alanmimms/WSPR-ease1Easy WSPR transmitter using ESP32C3 and not much else.
- Size
- 99 × 64 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 182
- Nets
- 155
- Pads
- 612
- Tracks, vias
- 1,076, 436
- Pours
- 12
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 25 Nov 2025
- Updated
- 18 Jul 2026
Overview
WSPR ease is an open-source printed circuit board by alanmimms, from the alanmimms/WSPR-ease repository on GitHub, published under the MIT licence. It is a 4-layer board of 99 × 64 mm with 182 parts on 155 nets, routed with 1,076 tracks and 436 vias.
It is built around the ICE40UP5K-SG48I, ESP32-S3-WROOM-1-N8R8 and TESEO-LIV3R, with the UCC27523DGN, AP2112K-3.3TRG1 and SI5351C-B-GM1 among its other parts. Its parts include 86 capacitors, 34 resistors, 13 ICs, 12 inductors and 8 diodes. It belongs with the ESP32 and FPGA and CPLD boards of this library.
Main components
12
ICE40UP5K-SG48I
QFN-48-EP(7x7)-40℃~+100℃ 1.14V~1.26V 1171456bit 39 5280 660 iCE40 UltraPlus QFN-48-EP(7x7) Programmable Logic Device (CPLDs/FPGAs) ROHSLatticeProgrammable Logic Device (CPLDs/FPGAs)
ESP32-S3-WROOM-1-N8R8
SMD,25.5x18mm-104.5dBm -40℃~+65℃ 2.4GHz 20.5dBm 330mA 3V~3.6V 97mA Bluetooth5.0 ESP32-S3R8 On-board PCB Antenna UART、SPI、I2C、GPIO、I2S、USB SMD,25.5x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
TESEO-LIV3R
SMD-18PSMD-18P GNSS Modules ROHSSTMicroelectronicsGNSS Modules
UCC27523DGN
HVSSOP-8-EP-0.65mm-40℃~+140℃ 1.9V~2.3V 1V~1.4V 2 4.5V~18V 5A 5A 6ns 7ns IGBT、MOSFET Low Side Under Voltage Protection HVSSOP-8-EP-0.65mm Gate Drivers ROHSTexas InstrumentsGate Drivers
AP2112K-3.3TRG1
SOT-25-5-40℃~+85℃@(Ta) 1 250mV@(600mA) 3.3V 50uVrms 55uA 600mA 65dB@(1kHz) 6V Fixed Over Current Protection、Thermal Shutdown、Enable control Positive SOT-25-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSDiodes IncorporatedVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
SI5351C-B-GM1
QFN-16(3x3)-40℃~+85℃ 2.25V~2.75V、3V~3.6V 200MHz QFN-16(3x3) Clock Generators, PLLs, Frequency Synthesizers ROHSSkyworks SolutionsClock Generators, PLLs, Frequency Synthesizers
SRV05-4.TCT
SOT-23-6L-55℃~+125℃ 12A@8/20us 17.5V 300W@8/20us 3pF 5V 5uA 6V Four channels IEC 61000-4-2、IEC 61000-4-5、IEC 61000-4-4 TVS Unidirectional SOT-23-6L ESD and Surge Protection (TVS/ESD) ROHSSEMTECHESD And Surge Protection (TVS/ESD)
TPS74612PQWDRBRQ1
SON-8-EP(3x3)-40℃~+150℃@(Tj) 1 1.2V 1A 25uA 38dB@(100kHz) 53uVrms 6V Fixed Positive Under Voltage Lockout、Over Current Protection、Over Temperature Protection、Short Circuit Protection SON-8-EP(3x3) Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTexas InstrumentsVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsKAM05FR71H104KH
-- Lack of specifications ROHSKyocera AVXUncategorised
MCS04020C5101FE000
0402-55℃~+155℃ 100mW 5.1kΩ 50V Thin Film Resistor ±1% ±50ppm/℃ 0402 Chip Resistor - Surface Mount ROHSVishay IntertechnologyChip Resistor - Surface Mount
CM105X5R106M25AT
0603Multilayer Ceramic Capacitors MLCC - SMD/SMTKyocera AVX
IRLML2060TRPBF
SOT-23-55℃~+150℃ 1 N-channel 1.25W 1.2A 2.5V 480mΩ@10V 6.6pF 60V 64pF 670pC SOT-23 MOSFETs ROHSInfineon TechnologiesMOSFETs
Parts
182| Qty | Value | Footprint | References |
|---|---|---|---|
| 28 | 1uF X5R 25V | Capacitor_SMD:C_0402_1005Metric | C103, C114, C115, C118, C201, C206, C211, C301, C306, C309, C310, C311, C312, C313, C314, C315 +12 |
| 20 | 100nF X7R 50V | Capacitor_SMD:C_0402_1005Metric | C101, C104, C105, C116, C302, C303, C307, C308, C401, C402, C403, C405, C412, C414, C421, C425 +4 |
| 12 | 5.1k | Resistor_SMD:R_0402_1005Metric | R103, R104, R305, R306, R307, R308, R309, R310, R402, R404, R410, R411 |
| 9 | 10uF X5R 25V | Capacitor_SMD:C_0603_1608Metric | C102, C106, C111, C113, C117, C119, C120, C406, C409 |
| 8 | IRLML2060 | Package_TO_SOT_SMD:SOT-23 | Q101, Q201, Q202, Q203, Q301, Q302, Q303, Q304 |
| 7 | 4.7uF | Capacitor_SMD:C_0402_1005Metric | C404, C407, C408, C413, C415, C422, C426 |
| 6 | 100 | Resistor_SMD:R_0402_1005Metric | R107, R108, R109, R110, R111, R401 |
| 6 | 10k | Resistor_SMD:R_0402_1005Metric | R105, R106, R403, R405, R408, R409 |
| 6 | 27 | Resistor_SMD:R_0402_1005Metric | R301, R302, R303, R304, R406, R407 |
| 4 | BAT54FILM | Diode_SMD:D_SOD-123 | D301, D302, D303, D304 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_3.2mm_M3_ISO7380_Pad | H101, H102, H103, H104 |
| 3 | 1.6nF NP0 25V | Capacitor_SMD:C_0402_1005Metric | C203, C204, C423 |
| 3 | 100k | Resistor_SMD:R_0402_1005Metric | R101, R102, R112 |
| 3 | 100pF NP0 50V | Capacitor_SMD:C_0402_1005Metric | C112, C304, C305 |
| 3 | 1uF | Capacitor_SMD:C_0402_1005Metric | C108, C109, C432 |
| 3 | 2.7uH | Inductor_SMD:L_1008_2520Metric | L201, L202, L203 |
| 3 | 330pF NP0 50V | Capacitor_SMD:C_0402_1005Metric | C207, C210, C424 |
| 3 | Fiducial | Fiducial:Fiducial_1mm_Mask2mm | FID101, FID102, FID103 |
| 3 | G6K-2 | Relay_SMD:Relay_DPDT_Omron_G6K-2G | K201, K202, K203 |
| 3 | SS14 | Diode_SMD:D_SMA | D201, D202, D203 |
| 2 | 180pF NP0 50V | Capacitor_SMD:C_0402_1005Metric | C213, C214 |
| 2 | 1uH | Inductor_SMD:L_1008_2520Metric | L204, L206 |
| 2 | 270nH | Inductor_SMD:L_0805_2012Metric | L207, L209 |
| 2 | 560pF NP0 50V | Capacitor_SMD:C_0402_1005Metric | C208, C209 |
| 2 | 82pF NP0 50V | Capacitor_SMD:C_0402_1005Metric | C212, C215 |
| 2 | 910pF NP0 50V | Capacitor_SMD:C_0402_1005Metric | C202, C205 |
| 2 | SMA | Library:SMA_Amphenol_901-143_Horizontal | J101, J103 |
| 2 | UCC27523DGN | Library:SOP65P490X110-9N | U301, U302 |
| 1 | 1.2uH | Inductor_SMD:L_1008_2520Metric | L205 |
| 1 | 100uF 35V | Capacitor_SMD:C_Elec_6.3x7.7 | C107 |
| 1 | 1nF NP0 100V | Capacitor_SMD:C_0603_1608Metric | C110 |
| 1 | 1uH@2A | Library:PFL4514-inductor | L301 |
| 1 | 2.2uH | Inductor_SMD:L_1008_2520Metric | L102 |
| 1 | 22.1k | Resistor_SMD:R_0402_1005Metric | R113 |
| 1 | 330nH | Inductor_SMD:L_0805_2012Metric | L208 |
| 1 | 40MHz | Library:ECSTXO201633400TR | Y401 |
| 1 | 47nH | Inductor_SMD:L_0603_1608Metric | L101 |
| 1 | 600@1A | Inductor_SMD:L_0603_1608Metric | FB101 |
| 1 | A | TestPoint:TestPoint_Pad_1.5x1.5mm | TP401 |
| 1 | AP2112K-3.3TRG1 | Library:SOT95P285X140-5N | U106 |
| 1 | B | TestPoint:TestPoint_Pad_1.5x1.5mm | TP402 |
| 1 | BN-43-202_DualPri_CTSec | Library:bn-43-202-horizontal | T301 |
| 1 | CR3032 holder | Library:S8401-46 | BT101 |
| 1 | ESP32-S3-WROOM-1-N8R8 | Library:ESP32-S3-WROOM-1 | U101 |
| 1 | GNSS module | RF_GPS:ublox_MAX | U105 |
| 1 | GPIO4 | TestPoint:TestPoint_Pad_1.5x1.5mm | TP101 |
| 1 | ICE40UP5K-SG48ITR | Library:QFN50P700X700X100-49N-D | U401 |
| 1 | LED_BGRA | Library:UHD111AFKAC3K23E1L3VG5ZB3Z3 | D101 |
| 1 | LMR51430YDDCR | Package_TO_SOT_SMD:SOT-23-6 | U107 |
| 1 | SI5351A-B-GT | Package_SO:MSOP-10_3x3mm_P0.5mm | U403 |
| 1 | SJ1-3514-SMT-TR | Library:35RASMT2BHWNTRX | J401 |
| 1 | SRV05-4 | Package_TO_SOT_SMD:SOT-23-6 | U102 |
| 1 | TAA5242IRGER | Library:TAA5242IRGER | U402 |
| 1 | TPS22918DBVR | Library:DBV6_TEX | U103 |
| 1 | TPS62A02NDRL | Package_TO_SOT_SMD:SOT-563 | U303 |
| 1 | TPS74612PQWDRBRQ1 | Library:SON65P300X300X100-9N-D | U104 |
| 1 | pwr+data | Library:UJ20-C-H-G-SMT-P16-TR | J102 |
Questions
How big is the WSPR ease PCB?
It measures 99 × 64 mm and has 4 copper layers, 1.6 mm thick.
What parts does the WSPR ease use?
182 parts, built around the ICE40UP5K-SG48I, ESP32-S3-WROOM-1-N8R8, TESEO-LIV3R and UCC27523DGN. 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 WSPR ease KiCad files?
From the alanmimms/WSPR-ease repository on GitHub, at the commit this page was made from: the board is hw/WSPR-ease.kicad_pcb and its schematic hw/LPFs.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the WSPR ease design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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