2 layers65.5 × 63 mm
PUTrain
knspektrum/putrain-pcb
kolaboracja między PUTrain a spektrum - PCB na nadajniki/repeatery/odbiorniki lora
14 parts
2 layers70 × 75 mm
PUTrain repeater
knspektrum/putrain-pcbkolaboracja między PUTrain a spektrum - PCB na nadajniki/repeatery/odbiorniki lora
- Size
- 70 × 75 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 40
- Nets
- 71
- Pads
- 154
- Tracks, vias
- 274, 19
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 11 Mar 2026
- Updated
- 4 Jun 2026
Overview
PUTrain repeater is an open-source printed circuit board by knspektrum, from the knspektrum/putrain-pcb repository on GitHub. It is a 2-layer board of 70 × 75 mm with 40 parts on 71 nets, routed with 274 tracks and 19 vias.
It is built around the ESP32-S3-DEVKITC-1-N8R8, LDL1117S33R and AO3401A, with the SS14 among its other parts. Its parts include 11 resistors, 7 capacitors, 6 ICs, 5 diodes and 3 connectors. It belongs with the ESP32 boards of this library.
Main components
4
ESP32-S3-DEVKITC-1-N8R8
-- WiFi Modules ROHSEspressif SystemsWiFi Modules
LDL1117S33R
SOT-223-4-40℃~+125℃@(Tj) 1 1.2A 18V 3.3V 500uA 600mV@(1.2A) 60uVrms 87dB@(120Hz) Fixed Over Current Protection、Thermal Shutdown Positive SOT-223-4 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSSTMicroelectronicsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
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
SS14
SMA(DO-214AC)-55℃~+150℃ 1A 25A 300uA@40V 40V 550mV@1A Independent SMA(DO-214AC) Schottky Diodes ROHSMDDSchottky Diodes
Parts
40| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 100 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3, R6, R7 |
| 3 | 4.7u | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1, C2, C5 |
| 2 | 100k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R10, R11 |
| 2 | 100n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3, C6 |
| 2 | 5k1 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R2 |
| 2 | AO3401A | Package_TO_SOT_SMD:SOT-23 | Q1, Q2 |
| 2 | LED | LED_THT:LED_D1.8mm_W1.8mm_H2.4mm_Horizontal_O1.27mm_Z8.2mm | D2, D5 |
| 2 | SS14 | Diode_SMD:D_SMA | D3, D4 |
| 1 | 1.5A | Fuse:Fuse_1812_4532Metric_Pad1.30x3.40mm_HandSolder | F1 |
| 1 | 1u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C4 |
| 1 | 22u | Capacitor_SMD:C_1210_3225Metric_Pad1.33x2.70mm_HandSolder | C7 |
| 1 | 2k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4 |
| 1 | 2k7 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R9 |
| 1 | 330 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R8 |
| 1 | 470 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5 |
| 1 | AP9101CK6 | Package_TO_SOT_SMD:SOT-23-6 | U4 |
| 1 | Ai-Thinker-Ra-02 | RF_Module:Ai-Thinker-Ra-01-LoRa | U2 |
| 1 | Battery Pins | Connector_Wire:SolderWire-0.75sqmm_1x02_P4.8mm_D1.25mm_OD2.3mm | J2 |
| 1 | ESP32-S3-DEVKITC-1-N8R8 | ESP32-S3-DEVKITC-1-N8R8 (1):ESP32-S3-DEVKITC-1-N8R8 | U1 |
| 1 | FerriteBead_Small | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | FB1 |
| 1 | LDL1117S33R | Package_TO_SOT_SMD:SOT-223 | U6 |
| 1 | MCP73832-2-OT | Package_TO_SOT_SMD:SOT-23-5 | U3 |
| 1 | SD05_SOD323 | Diode_SMD:D_SOD-323 | D1 |
| 1 | Switch I/O/II | Connector_Wire:SolderWire-0.75sqmm_1x03_P4.8mm_D1.25mm_OD2.3mm | J3 |
| 1 | To USB-C | Connector_JST:JST_PH_B6B-PH-K_1x06_P2.00mm_Vertical | J5 |
| 1 | WM02DN70A | Package_SO:TSSOP-8_4.4x3mm_P0.65mm | U5 |
The 36 most common of 40 parts.
More from knspektrum/putrain-pcb
2- 2 layers90 × 75 mm
Put train
knspektrum/putrain-pcb
kolaboracja między PUTrain a spektrum - PCB na nadajniki/repeatery/odbiorniki lora
5 parts
Similar boards
- 2 layers138 × 76 mm
- 2 layers102.5 × 71.1 mm
- 4 layers66 × 100 mm
- 2 layers31.8 × 55.9 mm
- 2 layers85 × 60 mm
Plytkamh
mhaftarc/pcb_project_mh
STM32F446 dev board designed in KiCad - 2-layer PCB with USB-C, BME280 and light sensor
57 parts - 4 layers70 × 100 mm
Indoor bike computer motherboard
Wh1teRabbitHU/indoor-bike-computer
It's a custom computer for indoor bikes to measure cadence, speed and power, store sessions, visualise ongoing statistics and replace non chargeable solutions
143 parts1GPL-3.0 - 4 layers95.9 × 90.2 mm
- 4 layers236.1 × 156.9 mm
Questions
How big is the PUTrain repeater PCB?
It measures 70 × 75 mm and has 2 copper layers, 1.6 mm thick.
What parts does the PUTrain repeater use?
40 parts, built around the ESP32-S3-DEVKITC-1-N8R8, LDL1117S33R, AO3401A and SS14. 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 PUTrain repeater KiCad files?
From the knspektrum/putrain-pcb repository on GitHub, at the commit this page was made from: the board is PUTrain/PUTrain_repeater/PUTrain_repeater.kicad_pcb and its schematic PUTrain/PUTrain.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the PUTrain repeater design in my own project?
Its repository states no licence, so its author keeps all rights: ask knspektrum before reusing the design.