4 layers158.5 × 81.5 mm
2 layers81.2 × 81.2 mm
View base
PROJECT-BIRO/Biro-11- Size
- 81.2 × 81.2 mm
- Copper layers
- 2
- Thickness
- 1.2 mm
- Parts
- 107
- Nets
- 90
- Pads
- 334
- Tracks, vias
- 834, 174
- Pours
- 10
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 12 Feb 2025
- Updated
- 15 Apr 2026
Overview
View base is an open-source printed circuit board by PROJECT-BIRO, from the PROJECT-BIRO/Biro-1 repository on GitHub, published under the MIT licence. It is a 2-layer board of 81.2 × 81.2 mm with 107 parts on 90 nets, routed with 834 tracks and 174 vias.
It is built around the CH340C, SN74LV1T34DBV and HX711, with the MT6701CT-STD, TMC6300-LA and VEML7700-TT among its other parts. Its parts include 29 capacitors, 21 resistors, 9 ICs, 8 diodes and 5 connectors.
Main components
11
CH340C
SOP-16-20℃~+70℃ 2Mbps 3.3V、5V 50uA 7mA Transceiver USB 2.0 SOP-16 USB Converters ROHSWCH (Nanjing Qinheng Microelectronics)USB Converters
SN74LV1T34DBV
SOT-23-5-40℃~+125℃ 1 1 1.6V~5.5V 10uA 5.5ns@5V,15pF 74LV 8mA 8mA Level shifting Push-pull Unidirectional SOT-23-5 Buffers, Drivers, Receivers, Transceivers ROHSTexas InstrumentsBuffers, Drivers, Receivers, TransceiversHX711
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)
MT6701CT-STD
SOP-8-40℃~+125℃ 0°~360° 1.75mm 10mA 3.3V~5V 3.9mm 5mm I2C、SSI Magnetic rotary position sensor No Programmable transmission、Zero position programming、Multi-axis magnetic field detection SOP-8 Position Sensors ROHSNOVOSENSEPosition SensorsTMC6300-LA
QFN-20(3x3)-40℃~+125℃ 2A 2A 2V~5.25V 3 30nA Interleaved conduction protection Three Phase Yes QFN-20(3x3) Brushless DC (BLDC) Motor Driver ROHSTRINAMIC Motion Control GmbHBrushless DC (BLDC) Motor Driver
VEML7700-TT
SMD-4P-25℃~+85℃ 120klx 16bit 2.35mm 2.5V~3.6V 3mm 6.8mm I2C Light Intensity Low power/sleep mode、Spectral correction/filtering、High dynamic range measurement、Adjustable gain control、Interrupt/event trigger、Built-in temperature compensation SMD-4P Ambient Light Sensors ROHSVishay IntertechnologyAmbient Light SensorsT-MICRO32_PLUS
COMM-SMDCOMM-SMD New Arrivals ROHSLILYGOUncategorised
TS1117BCW33 RPG
SOT-223-40℃~+125℃@(Ta) 1 1.5V@(1A) 12V 1A 3.3V 5mA 60dB@(120Hz) Fixed Over Current Protection、Over Temperature Protection、Thermal Shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTaiwan SemiconductorVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
SK6812SIDE-A
SMD-4P,4x1.6mm-40℃~+85℃ 0.6mA 1.6mm 120° 160mcd~320mcd 1kHz 2000V 240mcd~450mcd 2mm 3.7V~5.5V 460nm~470nm 4mm 520nm~535nm 620nm~625nm 697.5mcd~1162.5mcd 800Kbit/s Built-in power-on reset circuit Translucent Frosted Lens SMD-4P,4x1.6mm RGB LEDs(Built-in IC) ROHSOPSCO OptoelectronicsRGB LEDs(Built-In IC)
MMBT4403
SOT-23-55℃~+150℃ 1 PNP 100 100nA 200MHz 300mW 400mV 40V 5V 600mA PNP SOT-23 Bipolar (BJT) ROHShongjiachengBipolar (BJT)
UMH3N
SOT-363-55℃~+150℃ 0.5uA 100 100mA 150mW 2 NPN (Pre-Biased) 250MHz 300mV 50V 5V 6.11kΩ NPN SOT-363 Digital Transistors ROHSJiangsu Changjing Electronics Technology (CJ)Digital Transistors
README
README.mdBiro-1
A custom media controller for computers, allowing you to easily change volume, play/pause, skip/rewind, and launch favourite applications. Currently being developed!
Parts
107| Qty | Value | Footprint | References |
|---|---|---|---|
| 21 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | C1, C2, C3, C11, C12, C14, C15, C17, C19, C20, C21, C22, C23, C25, C27, C29 +5 |
| 8 | 10k | Resistor_SMD:R_0603_1608Metric | R3, R7, R8, R9, R10, R11, R12, R17 |
| 8 | SK6812SIDE-A | sk6812:SK6812-SIDE-A | D1, D2, D3, D4, D5, D6, D7, D8 |
| 6 | 10uF | Capacitor_SMD:C_0805_2012Metric | C9, C10, C16, C18, C24, C26 |
| 4 | 2.2k | Resistor_SMD:R_0603_1608Metric | R13, R14, R15, R16 |
| 4 | 330 | Resistor_SMD:R_2512_6332Metric | R18, R19, R20, R21 |
| 4 | MountHole | Holes:MountingHole_2.2mm_M2_ISO7380_Pad_NonVirtual | H4, H5, H6, H7 |
| 3 | MotorHole | Holes:MountingHole_M1.6 | H1, H2, H3 |
| 3 | RotorScrew (BOM-only) | BOM_Only:bom_only_no_pin | Z6, Z7, Z8 |
| 2 | 100 | Resistor_SMD:R_0603_1608Metric | R5, R6 |
| 2 | 5.1k | Resistor_SMD:R_0603_1608Metric | R1, R2 |
| 2 | AlignmentHole | Holes:MountingHole_2.2mm_M2_ISO7380_Pad_NonVirtual | H8, H9 |
| 1 | 1uF | Capacitor_SMD:C_0603_1608Metric | C28 |
| 1 | 22uF | Capacitor_SMD:C_0805_2012Metric | C13 |
| 1 | 3.3uH | Inductor_SMD:L_0805_2012Metric | L1 |
| 1 | 3.3v | Modified:TestPoint_Pad_D2.0mm_ValueSilk | TP2 |
| 1 | 5V | Modified:TestPoint_Pad_D2.0mm_ValueSilk | TP1 |
| 1 | 8.2k | Resistor_SMD:R_0603_1608Metric | R4 |
| 1 | A | SolderPads:SolderPads_2mm_3_STRAIN | J4 |
| 1 | AP2114HA-3.3 | Modified:SOT-223-3_TabPin2_InGndOut | U6 |
| 1 | B | SolderPads:SolderPads_2mm_3_STRAIN | J5 |
| 1 | BLDC | Molex:532610371 | J1 |
| 1 | BLDCMotor | BOM_Only:bom_only_no_pin | Z10 |
| 1 | BOOT | Modified:TestPoint_Pad_D2.0mm_ValueSilk | TP14 |
| 1 | CH340C | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U3 |
| 1 | CLK | Modified:TestPoint_Pad_D2.0mm_ValueSilk | TP10 |
| 1 | CSN | Modified:TestPoint_Pad_D2.0mm_ValueSilk | TP9 |
| 1 | DO | Modified:TestPoint_Pad_D2.0mm_ValueSilk | TP11 |
| 1 | EN | Modified:TestPoint_Pad_D2.0mm_ValueSilk | TP13 |
| 1 | GND | Modified:TestPoint_Pad_D2.0mm_ValueSilk | TP3 |
| 1 | HX711 | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U4 |
| 1 | LCD | SolderPads:SolderPads_2mm_8 | J3 |
| 1 | LED | Modified:TestPoint_Pad_D2.0mm_ValueSilk | TP12 |
| 1 | MMBT4403 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | MT6701-CT | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U1 |
| 1 | NetTie_2 | NetTie:NetTie-2_SMD_Pad0.5mm | NT1 |
| 1 | RX | Modified:TestPoint_Pad_D2.0mm_ValueSilk | TP16 |
| 1 | SCL | Modified:TestPoint_Pad_D2.0mm_ValueSilk | TP5 |
| 1 | SDA | Modified:TestPoint_Pad_D2.0mm_ValueSilk | TP4 |
| 1 | SN74LV1T34DBV | Package_TO_SOT_SMD:SOT-23-5 | U7 |
| 1 | T-Micro32_Plus | lilygo_micro32:T-Micro32 | U2 |
| 1 | TMC6300 | Modified:QFN-20-1EP_3x3mm_P0.4mm_EP1.65x1.65mm_ThermalVias_LargerViaHoles | U5 |
| 1 | TS1117BCW33_RPG | Modified:SOT-223-3_TabPin2_GndOutIn | U9 |
| 1 | TX | Modified:TestPoint_Pad_D2.0mm_ValueSilk | TP15 |
| 1 | U | Modified:TestPoint_Pad_D2.0mm_ValueSilk | TP6 |
| 1 | UMH3N | Package_TO_SOT_SMD:SOT-363_SC-70-6 | Q2 |
| 1 | USB_C_Receptacle_USB2.0 | GCT_USB:USB4510_NoPaste | J2 |
| 1 | V | Modified:TestPoint_Pad_D2.0mm_ValueSilk | TP7 |
| 1 | VEML7700 | VEML7700:VEML7700-TOP | U8 |
| 1 | W | Modified:TestPoint_Pad_D2.0mm_ValueSilk | TP8 |
| 1 | WatchGlass39.5mm | BOM_Only:bom_only_no_pin | Z9 |
| 1 | dummy_keepouts | view_custom:ViewKeepouts3d | Z5 |
Questions
How big is the View base PCB?
It measures 81.2 × 81.2 mm and has 2 copper layers, 1.2 mm thick.
What parts does the View base use?
107 parts, built around the CH340C, SN74LV1T34DBV, HX711 and MT6701CT-STD. 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 View base KiCad files?
From the PROJECT-BIRO/Biro-1 repository on GitHub, at the commit this page was made from: the board is firmware/biro-project-1/electronics/view_base/view_base.kicad_pcb and its schematic board/biro-battery-schematic/biro-0.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the View base 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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