2 layers40 × 24 mm
Preamp
M4a1x/nmr-spectrometer
My master thesis at D-CHAB (ETH Zürich) - Building a 25MHz NMR spectrometer
24 parts11GPL-3.0
4 layers100 × 60 mm
Work after r3
cfbird/usb3-sdrUSB3 direct-sampling HF SDR: AD9649 ADC -> ECP5 FPGA DDC -> FT601 USB 3. KiCad 9 + Verilog, co-designed by Claude and Gemini (AGY).
- Size
- 100 × 60 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 231
- Nets
- 316
- Pads
- 956
- Tracks, vias
- 1,936, 415
- Pours
- 7
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 25 Oct 2026
- Updated
- 28 Oct 2026
Overview
Work after r3 is an open-source printed circuit board by cfbird, from the cfbird/usb3-sdr repository on GitHub. It is a 4-layer board of 100 × 60 mm with 231 parts on 316 nets, routed with 1,936 tracks and 415 vias.
It is built around the LFE5U-25F-6BG256C, 74LVC1G17Z and PHA-13LN+, with the AD9649BCPZ-80, FT601Q-B-T and TPS7A2018PDBVR-TP among its other parts. Its parts include 110 capacitors, 65 resistors, 13 ICs, 13 inductors and 6 diodes. It belongs with the fPGA and programmable logic boards and the FPGA and CPLD boards of this library.
Main components
12
LFE5U-25F-6BG256C
CABGA-2560℃~+85℃ 1.045V~1.155V 1032192bit 197 24000 6000 ECP5 Supports hot swap、Supports SEU error detection and correction CABGA-256 Programmable Logic Device (CPLDs/FPGAs) ROHSLatticeProgrammable Logic Device (CPLDs/FPGAs)
74LVC1G17Z
SOT-553-40℃~+125℃ 1 1 1.65V~5.5V 10uA 32mA 32mA 4.4ns@5V,15pF 74LVC Push-pull Schmitt trigger Unidirectional SOT-553 Buffers, Drivers, Receivers, Transceivers ROHSDiodes IncorporatedBuffers, Drivers, Receivers, Transceivers
PHA-13LN+
SOT-89-4-40℃~+105℃ 1.2dB 138.9mA 17.9dB 1MHz~1GHz 20.1dB 23.9dB 24.5dBm 39dBm 3V、5V Linearization design SOT-89-4 RF Amplifiers ROHSMini-CircuitsRF Amplifiers
AD9649BCPZ-80
LFCSP-32(5x5)-40℃~+85℃ 0.35LSB 1 1.8V 14 320MHz 50mA 74.3dB 80MHz Built-in SPI Yes LFCSP-32(5x5) Analog to Digital Converters (ADC) ROHSAnalog DevicesAnalog To Digital Converters (ADC)
FT601Q-B-T
QFN-76-EP(9x9)-40℃~+85℃ 1.65V~3.6V 185mA 4mA 5Gbps 8 USB 2.0、USB 3.0 USB to FIFO QFN-76-EP(9x9) USB Converters ROHSFTDIUSB Converters
TPS7A2018PDBVR-TP
SOT-23-5-40℃~+85℃ 1 1.8V 280uV@(300mA) 2uA 300mA 5.5V 75dB@(1kHz) Fixed Over Current Protection、Enable、Thermal Shutdown Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTECH PUBLICUncategorisedLMK61E2-100M00SIAR
SMD7050-6P-40℃~+85℃ 100MHz 3.3V LVPECL ±50ppm SMD7050-6P Programmable Oscillators ROHSTexas InstrumentsTimers / CountersTPS7A2033PDBVR-TP
SOT-23-5-40℃~+85℃ 1 180uV@(300mA) 2uA 3.3V 300mA 5.5V 75dB@(1kHz) Fixed Over Current Protection、Enable、Thermal Shutdown Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTECH PUBLICUncategorised
1N4148W
SOD-123150mA 1A 1V@50mA 1uA@75V 400mW 4ns 75V Independent SOD-123 Switching Diodes ROHSSTMicroelectronicsSwitching Diodes
HFD4/5-SR
SMD,10x6.5mm-40℃~+85℃ 100mΩ 140mW 178Ω 2 Form C: 2C (DPDT-CO) 220V@DC、250V@AC 2A 300mA@125VAC、1A@30VDC 3ms 3ms 5V 8 AgNi + Gold plated Polarized-Single Coil SMD,10x6.5mm Signal Relays ROHSHFSignal Relays
ADT4-6T+
SMD-6P,7.8x5.6mm-20℃~+85℃ 0.1dB 0.94dB 1:4 24dB 2° 60kHz~300MHz SMD-6P,7.8x5.6mm Balun ROHSMini-CircuitsBalun
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
Parts
231| Qty | Value | Footprint | References |
|---|---|---|---|
| 58 | 100n | Capacitor_SMD:C_0402_1005Metric | C2, C12, C17, C19, C21, C100, C101, C102, C103, C104, C105, C106, C107, C108, C109, C110 +42 |
| 16 | 22 | Resistor_SMD:R_0402_1005Metric | R26, R27, R28, R29, R30, R31, R32, R33, R34, R35, R36, R37, R38, R39, R40, R41 |
| 14 | 10u | Capacitor_SMD:C_0603_1608Metric | C9, C13, C14, C20, C26, C52, C59, C74, C81, C82, C89, C92, C95, C96 |
| 8 | 100k | Resistor_SMD:R_0402_1005Metric | R1, R2, R5, R8, R10, R12, R14, R19 |
| 8 | 10k | Resistor_SMD:R_0402_1005Metric | R49, R51, R52, R53, R59, R60, R62, R63 |
| 7 | 1u | Capacitor_SMD:C_0402_1005Metric | C15, C16, C18, C22, C24, C50, C57 |
| 6 | 22u | Capacitor_SMD:C_0805_2012Metric | C1, C4, C6, C7, C10, C11 |
| 4 | 100 | Resistor_SMD:R_0402_1005Metric | R11, R13, R18, R43 |
| 4 | 1k | Resistor_SMD:R_0402_1005Metric | R47, R54, R55, R56 |
| 4 | 270n 0805HP 2% | Inductor_SMD:L_0805_2012Metric | L5, L6, L12, L13 |
| 4 | 4.7k | Resistor_SMD:R_0402_1005Metric | R44, R45, R57, R58 |
| 4 | MountingHole_2.7mm_M2.5 | MountingHole_2.7mm_M2.5 | H1, H2, H3, H4 |
| 3 | 180n 0805HP 2% | Inductor_SMD:L_0805_2012Metric | L4, L8, L11 |
| 3 | 2N7002 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q11 |
| 3 | 600R@100MHz | Inductor_SMD:L_0603_1608Metric | FB1, FB2, FB3 |
| 2 | 10p C0G | Capacitor_SMD:C_0402_1005Metric | C47, C48 |
| 2 | 11p C0G 2% | Capacitor_SMD:C_0805_2012Metric | C33, C45 |
| 2 | 130p C0G 2% | Capacitor_SMD:C_0402_1005Metric | C30, C42 |
| 2 | 160p C0G 2% | Capacitor_SMD:C_0402_1005Metric | C32, C44 |
| 2 | 1N4148W | Diode_SMD:D_SOD-123 | D2, D3 |
| 2 | 1u 2A shielded | Inductor_SMD:L_Taiyo-Yuden_NR-30xx | L1, L2 |
| 2 | 294 1% | Resistor_SMD:R_0402_1005Metric | R20, R22 |
| 2 | 30p C0G 2% | Capacitor_SMD:C_0805_2012Metric | C31, C43 |
| 2 | 33 | Resistor_SMD:R_0402_1005Metric | R24, R25 |
| 2 | 330 | Resistor_SMD:R_0402_1005Metric | R64, R65 |
| 2 | 33p C0G | Capacitor_SMD:C_0402_1005Metric | C66, C67 |
| 2 | 4.7u | Capacitor_SMD:C_0603_1608Metric | C68, C70 |
| 2 | 61.9 1% | Resistor_SMD:R_0402_1005Metric | R15, R17 |
| 2 | 62p C0G 2% | Capacitor_SMD:C_0402_1005Metric | C28, C40 |
| 2 | 62p C0G 2% | Capacitor_SMD:C_0805_2012Metric | C29, C41 |
| 2 | 91p C0G 2% | Capacitor_SMD:C_0402_1005Metric | C34, C46 |
| 2 | HFD4/5-SR | usb3sdr:Relay_DPDT_Hongfa_HFD4-SR | K1, K2 |
| 2 | LED green | LED_SMD:LED_0603_1608Metric | D4, D5 |
| 2 | TPS7A2018PDBVR | Package_TO_SOT_SMD:SOT-23-5 | U5, U7 |
| 1 | 0.47 | Resistor_SMD:R_0402_1005Metric | R9 |
| 1 | 1.1A | Fuse:Fuse_1206_3216Metric | F1 |
| 1 | 1.6k 1% | Resistor_SMD:R_0402_1005Metric | R48 |
| 1 | 100k 1% | Resistor_SMD:R_0402_1005Metric | R3 |
| 1 | 10k 1% | Resistor_SMD:R_0402_1005Metric | R42 |
| 1 | 120k 1% | Resistor_SMD:R_0402_1005Metric | R4 |
| 1 | 15p C0G 2% | Capacitor_SMD:C_0805_2012Metric | C36 |
| 1 | 15u bias choke | Inductor_SMD:L_1206_3216Metric | L10 |
| 1 | 17.8 1% | Resistor_SMD:R_0402_1005Metric | R21 |
| 1 | 1M | Resistor_SMD:R_0402_1005Metric | R46 |
| 1 | 1n | Capacitor_SMD:C_0402_1005Metric | C3 |
| 1 | 1u | Inductor_SMD:L_0805_2012Metric | L3 |
| 1 | 200 1% | Resistor_SMD:R_0402_1005Metric | R23 |
| 1 | 2038-09-SM (90V) | Fuse:GDT_Bourns_2038 | GDT1 |
| 1 | 226k 1% | Resistor_SMD:R_0402_1005Metric | R6 |
| 1 | 249 1% | Resistor_SMD:R_0402_1005Metric | R16 |
| 1 | 30MHz 20pF X322530MSB4SI | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | 39p C0G 2% | Capacitor_SMD:C_0402_1005Metric | C35 |
| 1 | 4.7n 250V | Capacitor_SMD:C_0603_1608Metric | C65 |
| 1 | 47n 0805HP 2% | Inductor_SMD:L_0805_2012Metric | L9 |
| 1 | 47p C0G 2% | Capacitor_SMD:C_0402_1005Metric | C37 |
| 1 | 49.9 | Resistor_SMD:R_0402_1005Metric | R61 |
| 1 | 49.9k 1% | Resistor_SMD:R_0402_1005Metric | R7 |
| 1 | 50 (place at FPGA) | Resistor_SMD:R_0402_1005Metric | R50 |
| 1 | 74LVC1G17 | Package_TO_SOT_SMD:SOT-23-5 | U14 |
| 1 | 82n 0805HP 2% | Inductor_SMD:L_0805_2012Metric | L7 |
| 1 | AD9649BCPZ-80 | Package_CSP:LFCSP-32-1EP_5x5mm_P0.5mm_EP3.5x3.5mm_ThermalVias | U8 |
| 1 | ADT4-6T+ | RF_Mini-Circuits:Mini-Circuits_CD637_H5.23mm | T1 |
| 1 | AO3401A | Package_TO_SOT_SMD:SOT-23 | Q10 |
| 1 | BAV99 | Package_TO_SOT_SMD:SOT-23 | D10 |
| 1 | FT601Q-B-T | Package_DFN_QFN:QFN-76-1EP_9x9mm_P0.4mm_EP5.81x6.31mm | U11 |
| 1 | LFE5U-25F-6BG256C | Package_BGA:BGA-256_14.0x14.0mm_Layout16x16_P0.8mm_Ball0.45mm_Pad0.32mm_NSMD | U12 |
| 1 | LMK61E2-100M00SIAR | usb3sdr:TI_SIA0008B_QFM-8_7x5mm | U9 |
| 1 | PHA-13LN+ | Package_TO_SOT_SMD:SOT-89-3 | U13 |
| 1 | PMOD0 | Connector_PinHeader_2.54mm:PinHeader_2x06_P2.54mm_Horizontal | J5 |
| 1 | PMOD1 | Connector_PinHeader_2.54mm:PinHeader_2x06_P2.54mm_Horizontal | J6 |
| 1 | SMA 10MHz REF | Connector_Coaxial:SMA_Amphenol_132289_EdgeMount | J4 |
| 1 | SMA RF IN | Connector_Coaxial:SMA_Amphenol_132289_EdgeMount | J2 |
| 1 | SMF5.0A | Diode_SMD:D_SOD-123F | D1 |
| 1 | TC2050 JTAG | Connector:Tag-Connect_TC2050-IDC-NL_2x05_P1.27mm_Vertical | J3 |
| 1 | TLV75525PDBVR | Package_TO_SOT_SMD:SOT-23-5 | U4 |
| 1 | TPS22918DBVR | Package_TO_SOT_SMD:SOT-23-6 | U1 |
| 1 | TPS62A02ADRLR | Package_TO_SOT_SMD:SOT-563 | U2 |
| 1 | TPS62A02ADRLR (forced PWM) | Package_TO_SOT_SMD:SOT-563 | U3 |
| 1 | TPS7A2033PDBVR | Package_TO_SOT_SMD:SOT-23-5 | U6 |
| 1 | USB3 Micro-B | Connector_USB:USB3_Micro-B_Connfly_DS1104-01 | J1 |
The 230 most common of 231 parts.
Questions
How big is the Work after r3 PCB?
It measures 100 × 60 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Work after r3 use?
231 parts, built around the LFE5U-25F-6BG256C, 74LVC1G17Z, PHA-13LN+ and AD9649BCPZ-80. 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 Work after r3 KiCad files?
From the cfbird/usb3-sdr repository on GitHub, at the commit this page was made from: the board is kicad/deeppcb/work_after_r3.kicad_pcb and its schematic kicad/adc_clk.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Work after r3 design in my own project?
Its repository states no licence, so its author keeps all rights: ask cfbird before reusing the design.
Similar boards
- 4 layers66 × 46 mm
Radar1
HearnChristian/k-band-fmcw-radar
24 GHz FMCW radar front-end in KiCad (WIP): ADF4159 chirp synth, BGT24LTR11 transceiver, custom Marki AMM-8211PSM driver-amp symbol/footprint, OPA1656 IF, ADS8353 ADC, FT2232H USB.
99 parts3 - 4 layers100 × 85 mm
- 4 layers117.6 × 83 mm
Nile test chip pcb
Ash-tronix/nile_test_chip_pcb
KiCad PCB design files to support the Ashtronix® Nile test chip.
177 parts - 4 layers100 × 75 mm
- 8 layers230 × 145.3 mm
OptiLogic-16-Pro
HexFud/OptiLogic-16-Pro
A logic analyzer with 16 channels that can also watch two fiber network links at the same time
342 parts - 2 layers55 × 100 mm
ScoutAM
RADARC/Scout-Radio
Si4732 and Raspberry Pi Pico Radio device for Scouts to build and use to gain badges
92 parts6GPL-3.0 - 4 layers72.4 × 69.8 mm
