2 layers65.4 × 68 mm
S3-27-epaper touch
Uspizig/WifiWallSwitch
A WallSwitch with a clever EINK Display that measures your Air Quality, measures Temperature, detects movement, measures Light Conditions... and many more.
159 parts4
2 layers38 × 38 mm
Syldra
ambraglow/syldra1- Size
- 38 × 38 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 87
- Nets
- 107
- Pads
- 309
- Tracks, vias
- 594, 177
- Pours
- 15
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 5 Nov 2025
- Updated
- 27 Jan 2026
Overview
Syldra is an open-source printed circuit board by ambraglow, from the ambraglow/syldra repository on GitHub, published under the CERN-OHL-W-2.0 licence. It is a 2-layer board of 38 × 38 mm with 87 parts on 107 nets, routed with 594 tracks and 177 vias.
It is built around the NRF52840-QIAA-R, BME280 and NPM1300-QEAA-R7, with the MBR0530, GCQ1555C1HR80WB01D and AC0402FR-070RL among its other parts. Its parts include 41 capacitors, 7 inductors, 6 resistors, 6 diodes and 3 ICs. It belongs with the nRF52 and nRF5x boards of this library.
Main components
12
NRF52840-QIAA-R
AQFN-73-EP(7x7)-95dBm 1.7V~5.5V 2.4GHz 2.4GHz~2.4835GHz 2Mbps 4.82mA 6.26mA 8dBm SPI、USB、UART、ADC、I2S、PWM ZigBee、Bluetooth、LoRa、ISM transceiver AQFN-73-EP(7x7) RF Transceiver ICs ROHSNORDICRF Transceiver ICs
BME280
LGA-8(2.5x2.5)-40℃~+85℃ 0%RH~100%RH 1.71V~3.6V 1.8uA 16bit I2C、SPI ±0.5℃ ±3%RH LGA-8(2.5x2.5) Temperature and Humidity Sensor ROHSBoschTemperature And Humidity SensorNPM1300-QEAA-R7
QFN-32-EP(5x5)Adjustable current limiting、Light-load high efficiency mode、Output discharge QFN-32-EP(5x5) Power Management - Specialized ROHSNordic SemiconPower Management - Specialized
MBR0530
SOD-1231 Independent 30V 5.5A 500mA 550mV@500mA 80uA@30V SOD-123 Schottky Diodes ROHSJiangsu Changjing Electronics Technology (CJ)Schottky Diodes
GCQ1555C1HR80WB01D
04020.8pF 50V C0G 0402 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSMurataMultilayer Ceramic Capacitors MLCC - SMD/SMT
AC0402FR-070RL
0402-55℃~+155℃ 0Ω 50V 62.5mW Thick Film Resistor ±1% 0402 Chip Resistor - Surface Mount ROHSYAGEOChip Resistor - Surface Mount
KLZ1608MHR100WTD25
06031.365Ω 10uH 250mA 90mA ±20% 0603 Inductors (SMD) ROHSTDKInductors (SMD)
MLK1005S15NJTD25
040215nH 300mA 4GHz 500mΩ 7@100MHz ±5% 0402 Inductors (SMD) ROHSTDKInductors (SMD)
ECS-.327-9-12QS-TR
SMD2012-2P-40℃~+125℃ 32.768kHz 90kΩ 9pF ±20ppm SMD2012-2P Crystals ROHSECSCrystals
CX2016DB32000D0WZRC1
SMD2016-4P-25℃~+75℃ 32MHz 60Ω 8pF ±25ppm ±40ppm SMD2016-4P Crystals ROHSKyocera AVXCrystals
AFC24-S24FIC-00
SMD,P=0.5mm,卧贴0.3mm 0.5mm 24P 2mm Copper alloy Double-Sided Contacts, Top and Bottom Entry Hinged Lid Surface Mount, Right Angle Tin SMD,P=0.5mm,卧贴 FFC, FPC (Flat Flexible) Connector Assemblies ROHSJSFFC, FPC (Flat Flexible) Connector Assemblies
SI1308EDL
SC-70-3-55℃~+150℃ 1 N-channel 1.4nC@10V 1.5A 1.5V 105pF 11pF 132mΩ@10V 23pF 30V 400mW N-Channel SOT-323 MOSFETs ROHSVishay IntertechnologyMOSFETs
README
README.mdSyldra
A room thermostat with home-assistant support, with a cute E-Ink screen for displaying data, a knob for setting target temperature and sensors for periodic measurements.
Firmware currently W.I.P.
Parts
87| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | TestPoint | TestPoint:TestPoint_Pad_D1.0mm | TP1, TP2, TP4, TP5, TP6, TP7, TP8, TP9 |
| 7 | 100nF | Capacitor_SMD:C_0402_1005Metric | C5, C7, C8, C12, C21, C22, C30 |
| 7 | 10uF | Capacitor_SMD:C_0603_1608Metric | C23, C24, C25, C26, C27, C33, C34 |
| 7 | 1uF | Capacitor_SMD:C_0402_1005Metric | C37, C38, C39, C40, C41, C42, C43 |
| 4 | 12pF | Capacitor_SMD:C_0402_1005Metric | C1, C2, C16, C17 |
| 3 | 4.7uF | Capacitor_SMD:C_0603_1608Metric | C6, C19, C20 |
| 3 | LED_Small_Filled | LED_SMD:LED_0603_1608Metric | D1, D2, D3 |
| 3 | MBR0530 | Diode_SMD:D_SOD-123 | D4, D5, D6 |
| 3 | MountingHole_Pad | MountingHole:MountingHole_2.1mm | H1, H2, H3 |
| 2 | 1.0uF | Capacitor_SMD:C_0603_1608Metric | C13, C14 |
| 2 | 10k | Resistor_SMD:R_0402_1005Metric | R5, R6 |
| 2 | 1uF | Capacitor_SMD:C_0603_1608Metric | C28, C29 |
| 2 | 2.2uH | nonorf:L0806 | L5, L6 |
| 2 | 4.7uF | Capacitor_SMD:C_0402_1005Metric | C35, C36 |
| 2 | Jumper_2_Small_Bridged | nonorf:R0402_bridged | JP1, JP2 |
| 2 | LOGO | LOGO | G***, G*** |
| 1 | 0.5pF | Capacitor_SMD:C_0402_1005Metric | C18 |
| 1 | 0.8pF | Capacitor_SMD:C_0402_1005Metric | C4 |
| 1 | 0Ω | Inductor_SMD:L_0402_1005Metric | L2 |
| 1 | 1.5pF | Capacitor_SMD:C_0402_1005Metric | C3 |
| 1 | 100pF | Capacitor_SMD:C_0402_1005Metric | C11 |
| 1 | 10uH | Inductor_SMD:L_0603_1608Metric | L3 |
| 1 | 15nH | Inductor_SMD:L_0402_1005Metric | L4 |
| 1 | 1M | Resistor_SMD:R_0402_1005Metric | R9 |
| 1 | 1nF | Capacitor_SMD:C_0402_1005Metric | C9 |
| 1 | 2.2ohm | Resistor_SMD:R_0603_1608Metric | R8 |
| 1 | 3.9nH | Inductor_SMD:L_0402_1005Metric | L1 |
| 1 | 32.768kHz | Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm | Y2 |
| 1 | 32MHz | Crystal:Crystal_SMD_2016-4Pin_2.0x1.6mm | Y1 |
| 1 | 470k | Resistor_SMD:R_0402_1005Metric | R3 |
| 1 | 47k | Resistor_SMD:R_0402_1005Metric | R4 |
| 1 | 47nF | Capacitor_SMD:C_0603_1608Metric | C15 |
| 1 | 47uH | Inductor_SMD:L_Taiyo-Yuden_MD-4040 | L7 |
| 1 | AFC24-S24FIC-00 | nonorf:FPC-SMD_P0.50-24P_QCHF-SM-H2.0 | FPC1 |
| 1 | Antenna | nonorf:2.4GHz-meander_antenna | AE2 |
| 1 | BME280 | Package_LGA:Bosch_LGA-8_2.5x2.5mm_P0.65mm_ClockwisePinNumbering | U3 |
| 1 | Conn_01x02 | Connector_JST:JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | J3 |
| 1 | Conn_01x03 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J2 |
| 1 | N.C. | Capacitor_SMD:C_0402_1005Metric | C10 |
| 1 | NPM1300-QEAA-R7 | nonorf:QFN-32_L5.0-W5.0-P0.50-TL-EP3.5 | U2 |
| 1 | Si1308EDL | Package_TO_SOT_SMD:SOT-323_SC-70 | Q1 |
| 1 | TestPoint | TestPoint:TestPoint_Pad_D1.5mm | TP3 |
| 1 | USB_C_Receptacle | nonorf:USB-C-SMD_HANELECTRICITY_161N-4XVS11 | J1 |
| 1 | nRF52840-QIAA-R | Package_DFN_QFN:Nordic_AQFN-73-1EP_7x7mm_P0.5mm | U1 |
Questions
How big is the Syldra PCB?
It measures 38 × 38 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Syldra use?
87 parts, built around the NRF52840-QIAA-R, BME280, NPM1300-QEAA-R7 and MBR0530. 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 Syldra KiCad files?
From the ambraglow/syldra repository on GitHub, at the commit this page was made from: the board is syldra.kicad_pcb and its schematic syldra.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Syldra design in my own project?
Its repository publishes it under the CERN-OHL-W-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
Similar boards
- 4 layers60 × 90 mm
- 4 layers70.2 × 71 mm
C3-27-epaper touch
martinberlin/bistable-smart-switch
An epaper switch project with 2 PCBs, controller+touch, and 220AC to 3DC with Relay (Latch or solid-state)
64 parts32Apache-2.0 - 4 layers50.3 × 33 mm
- 4 layers83.4 × 42.1 mm
H C3-ulp29
martinberlin/H-C3-029-eink
This is a joint project between Larry Bank and Fasani Corp with the purpouse to make an easy and unexpensive nRF52 BLE badge with a SPI 2.9", a QWIIC connector, and on board RTC
54 parts5MIT - 4 layers53.5 × 33 mm
H C6-ulp
martinberlin/H-C6-ulp
ESP32C6 in a very low power design with a 24 pin FPC for a small SPI Epaper
82 parts4GPL-3.0 - 6 layers43 × 82.4 mm
Cmd z5
befinitiv/cmd-z5-pager
Replacement PCB & Software to turn Sony CMD-Z5 into a Meshtastic/Lorawan pager
120 parts - 2 layers91 × 77 mm
