2 layers89 × 107.5 mm
2 layers89 × 107.5 mm
Protosync
r8bx/protosync- Size
- 89 × 107.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 57
- Nets
- 61
- Pads
- 219
- Tracks, vias
- 426, 65
- Pours
- 243
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 21 May 2026
- Updated
- 22 May 2026
Overview
Protosync is an open-source printed circuit board by r8bx, from the r8bx/protosync repository on GitHub. It is a 2-layer board of 89 × 107.5 mm with 57 parts on 61 nets, routed with 426 tracks and 65 vias.
It is built around the SN74LVC3G17DCTR, ADS1015IDGS and CAT24C256LI, with the H11L1 among its other parts. Its parts include 16 resistors, 12 capacitors, 9 connectors, 6 ICs and 3 switches.
Main components
4
SN74LVC3G17DCTR
MSOP-8-2.8mm-40℃~+85℃ 1.65V~5.5V 10uA 3 3 32mA 32mA 5.4ns@3.3V,50pF 74LVC Push-pull Schmitt trigger Unidirectional MSOP-8-2.8mm Buffers, Drivers, Receivers, Transceivers ROHSTexas InstrumentsBuffers, Drivers, Receivers, Transceivers
ADS1015IDGS
VSSOP-10-0.5mm-40℃~+125℃ 0.5LSB 12 128Hz、250Hz、490Hz、920Hz、1.6kHz、2.4kHz、3.3kHz 1MHz 2 2V~5.5V 2uA 3.3kHz 5ppm/℃ 6.144V Built-in Built-in I2C Sigma-Delta Support Yes VSSOP-10-0.5mm Analog to Digital Converters (ADC) ROHSTexas InstrumentsAnalog To Digital Converters (ADC)
CAT24C256LI
PDIP-81,000,000 cycles 1.8V~5.5V 100 Years 256Kbit 400kHz 5ms Hardware write protection function、Noise suppression function、Built-in power-on reset (POR) I2C PDIP-8 EEPROM ROHSonsemiEEPROM
H11L1
DIP-6-55℃~+100℃ 1 1.6mA 1Mbit/s 250mW 3V~15V 5kV DC DIP-6 Logic Output Optoisolators ROHSEverlight ElectronicsLogic Output Optoisolators
Parts
57| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 1n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C5, C6, C7, C10, C11, C12 |
| 5 | 0.1u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2, C3, C4, C9 |
| 5 | AudioJack3 | footprints_global:SJ13513SMTTR | J2, J3, J4, J5, J6 |
| 4 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5, R6, R7, R13 |
| 4 | 1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R8, R9, R10, R14 |
| 4 | 1k@100 MHz | Inductor_SMD:L_0805_2012Metric_Pad1.15x1.40mm_HandSolder | FB1, FB2, FB3, FB4 |
| 4 | 3.9k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R11, R12, R15, R16 |
| 4 | MountingHole_2.7mm_M2.5 | MountingHole:MountingHole_2.7mm_M2.5 | MH1, MH2, MH3, MH4 |
| 3 | SW_Push | footprints_global:SW_Cherry_MX_PCB | SW1, SW2, SW3 |
| 2 | Conn_01x02_Pin | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J8, J9 |
| 2 | SN74LVC3G17DCTR | footprints_global:SOP65P400X130-8N | IC1, IC2 |
| 1 | 100n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C8 |
| 1 | 10R | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4 |
| 1 | 1N914 | Diode_SMD:D_MiniMELF_Handsoldering | D1 |
| 1 | 220R | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2 |
| 1 | 33R | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3 |
| 1 | 470R | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 1 | ADS1015IDGS | Package_SO:VSSOP-10_3x3mm_P0.5mm | U3 |
| 1 | CAT24C256 | Package_SO:TSSOP-8_4.4x3mm_P0.65mm | U2 |
| 1 | Conn_01x03_Pin | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J7 |
| 1 | GPIO | Connector_PinSocket_2.54mm:PinSocket_2x20_P2.54mm_Vertical | J1 |
| 1 | H11L1 | Package_DIP:DIP-6_W8.89mm_SMDSocket_LongPads | U1 |
| 1 | ID_WP | Jumper:SolderJumper-2_P1.3mm_Open_Pad1.0x1.5mm | JP1 |
| 1 | lib_RV142FPF | footprints_global:RV142FPF40B120K0B10K004 | RV1 |
| 1 | ~ | footprints_global:Waveshare_2inch_LCD Module | U4 |
Questions
How big is the Protosync PCB?
It measures 89 × 107.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Protosync use?
57 parts, built around the SN74LVC3G17DCTR, ADS1015IDGS, CAT24C256LI and H11L1. 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 Protosync KiCad files?
From the r8bx/protosync repository on GitHub, at the commit this page was made from: the board is protosync-hardware/protosync.kicad_pcb and its schematic protosync-hardware/buttons.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Protosync design in my own project?
Its repository states no licence, so its author keeps all rights: ask r8bx before reusing the design.
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