2 layers
4 layers100 × 100 mm
Smart pillow
Proiect-Krontech/ProiectKrontech- Size
- 100 × 100 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 34
- Nets
- 72
- Pads
- 228
- Tracks, vias
- 414, 111
- Pours
- 5
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 21 Apr 2026
- Updated
- 17 May 2026
Overview
Smart pillow is an open-source printed circuit board by Proiect-Krontech, from the Proiect-Krontech/ProiectKrontech repository on GitHub. It is a 4-layer board of 100 × 100 mm with 34 parts on 72 nets, routed with 414 tracks and 111 vias.
It is built around the HX711, TXS0104ED and AMS1117-3.3, with the ESP32-MINI-1, TYPE-C 6P(073) and 2N2222A among its other parts. Its parts include 11 capacitors, 9 ICs, 4 resistors and 1 transistor. It belongs with the ESP32 boards of this library.
Main components
6
HX711
SOP-16-40℃~+85℃ 1.4mA 10Hz、80Hz 1MHz~20MHz、11.0592MHz 2 2.6V~5.5V 20mV、40mV、80mV 24 Built-in External、Built-in SPI Support Yes SOP-16 Analog to Digital Converters (ADC) ROHSAvia SemiconAnalog To Digital Converters (ADC)
TXS0104ED
SOIC-14-40℃~+85℃ 1 1.65V~3.6V 2.3V~5.5V 24Mbps 4 Auto Direction Detection Bidirectional Push-Pull、Open-drain SOIC-14 Translators, Level Shifters ROHSTexas InstrumentsTranslators, Level Shifters
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsESP32-MINI-1
SMDSMD New Arrivals ROHSEspressif SystemsUncategorised
TYPE-C 6P(073)
SMD-30℃~+80℃ 1 10 thousand cycles 3A 5V 6.8mm 6P Black Female Surface Mount, Right Angle Type-C SMD USB Connectors ROHSSHOU HANUSB Connectors
2N2222A
TO-92-55℃~+150℃ 1 NPN 100MHz 100nA 400 40V 5V 600mA 600mV 625mW NPN TO-92 Bipolar (BJT) ROHSSlkorBipolar (BJT)
Parts
34| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | ~ | Connector_Wire:SolderWire-0.5sqmm_1x03_P4.8mm_D0.9mm_OD2.3mm | Load_cell1, Load_cell2, Load_cell3, Load_cell4, Load_cell5, Load_cell6, Load_cell7, Load_cell8 |
| 6 | 10uF | Capacitor_SMD:C_0805_2012Metric | C1, C2, C5, C7, C9, C11 |
| 4 | 0.1uF | Capacitor_SMD:C_0805_2012Metric | C4, C6, C8, C10 |
| 4 | HX711 | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U2, U3, U4, U10 |
| 2 | 5.1k | Resistor_SMD:R_0805_2012Metric | R1, R2 |
| 2 | TXS0104ED | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U8, U9 |
| 1 | 10k | Resistor_SMD:R_0805_2012Metric | R4 |
| 1 | 1k | Resistor_SMD:R_0805_2012Metric | R3 |
| 1 | 1uF | Capacitor_SMD:C_0805_2012Metric | C3 |
| 1 | 2N2222A | 2N2222A:TO127P584H533-3 | Q2 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U7 |
| 1 | Buzzer | Buzzer_Beeper:Buzzer_12x9.5RM7.6 | BZ2 |
| 1 | ESP32-MINI-1 | PCM_Espressif:ESP32-MINI-1 | U1 |
| 1 | TYPE-C_6P(073) | footprint:TYPE-C-SMD_TYPE-C-6P-073 | U6 |
Questions
How big is the Smart pillow PCB?
It measures 100 × 100 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Smart pillow use?
34 parts, built around the HX711, TXS0104ED, AMS1117-3.3 and ESP32-MINI-1. 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 Smart pillow KiCad files?
From the Proiect-Krontech/ProiectKrontech repository on GitHub, at the commit this page was made from: the board is hardware/future direction/smart_pillow/smart_pillow/smart_pillow.kicad_pcb and its schematic hardware/future direction/smart_pillow/smart_pillow/smart_pillow.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Smart pillow design in my own project?
Its repository states no licence, so its author keeps all rights: ask Proiect-Krontech before reusing the design.
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