Opensync
About the Opensync PCB
Opensync is an open source RP2040/RP2350 PCB design by ErichZimmer, published on GitHub under the CERN-OHL-S-2.0 license. It is a 4-layer board measuring 160 × 100 mm, with 220 components from 75 distinct parts.
Its main chip is the NCP1117-3.3_SOT223, from the RP2040/RP2350 family. Other key parts include the RP2354_80QFN, NXE2S0505MC, SN74LVC1G17DCKR, SN74LVC1T45DCKR and TPS2116DRL. By type, the board carries 76 resistors, 74 capacitors, 34 ICs, 15 connectors, 12 diodes and 5 inductors.
From the project
An open source synchronizer for velocimetry of fluids.
For a more detailed specification, please read the datasheet.
If successfull, no errors or warnings should be produced. Please note that all commands to and from opensync are terminated with CRLF. Additionally, all used output terminals should be validated on an osciliscope for peace-of-mind, allthough this is not strictly necessary.
- Software: All firmware and software components are covered by the GNU GPLv3 license. - Hardware: All hardware is covered by the CERN-OHL-S-v2 license.
Main components on the Opensync
Opensync bill of materials (BOM)
220 components, 75 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | NCP1117-3.3_SOT223 RP2354_80QFN | RP2350-QFN-80-1EP_10x10_P0.4mm_EP3.4x3.4mm_ThermalVias | U1 |
| 1 | RP2354_80QFN SN74LVC2T45DCUR | DCU8 | U2 |
| 1 | NXE2S0505MC TPS2116DRL | SOT-583-8 | U3 |
| 1 | SN74LVC1G17DCKR SN74LVC2T45DCUR | DCU8 | U4 |
| 2 | SN74LVC1T45DCKR TPS2116DRL | SOT-583-8 | U5, U7 |
| 2 | SN74LVC1T45DCKR SN74LVC2T45DCUR | DCU8 | U6, U8 |
| 6 | TPS2116DRL | SOT-583-8 | U9, U11, U13, U15, U17, U31 |
| 4 | SN74LVC2T45DCUR | DCU8 | U10, U12, U14, U16 |
| 10 | TPD1E05U06DYA | D_SOD-523 | U20, U21, U22, U23, U24, U25, U26, U27 +2 |
| 1 | TPS63802DLAR | DLA0010A | U32 |
| 2 | SN74LVC1G17DCKR | SOT65P210X110-5N | U33, U35 |
| 2 | 74LVC1G86 | SOT65P210X110-5N | U34, U36 |
| 1 | TPS62912 | Texas_RPU0010A_VQFN-HR-10_2x2mm_P0.5mm | U37 |
| 1 | ABM8-272-T3 | XTAL_ABM8-272-T3 | Y1 |
| 1 | 61400416121 SM03B-SRSS-TB | JST_SH_SM03B-SRSS-TB_1x03-1MP_P1.00mm_Horizontal | J1 |
| 5 | 61611042121502 705530001 | CONN_705530001_02_MOL | J2, J4, J5, J6, J7 |
| 4 | 705530001 | CONN_705530001_02_MOL | J3, J8, J9, J11 |
| 1 | SM03B-SRSS-TB 705530001 | CONN_705530001_02_MOL | J12 |
| 1 | 61611042121502 MUSBD11130 | USB_B_Amphenol_MUSBD11130 | J13 |
| 1 | Barrel_Jack_Switch | BarrelJack_Wuerth_6941xx301002 | J14 |
Show 55 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | Conn_01x02 | CONN-TH_705430001 | J15, J16 |
| 2 | SW_Push | SW_Push_1P1T_NO_Vertical_Wuerth_434133025816 | SW1, SW2 |
| 1 | 2-1825027-0 | SW2_1825027-G_TEC | SW3 |
| 11 | LED | LED-SMD_L4.0-W3.6_A67F-U2BA-1-3A4B-30-R33 | D2, D3, D4, D5, D6, D7, D8, D9 +3 |
| 1 | 824011 5V Wurth Elektronik | WE-TVS_SOT23-5L | D14 |
| 1 | 742792641 0603_W2.6_742792641 Wurth Elektronik | FB_Wurth_WE-CBF-0603_W2.6 | FB1 |
| 1 | 3.3U 3.3u | L_pol_2016 | L1 |
| 1 | 15U 470n | L_TDK_TMS252012ALM | L2 |
| 1 | 22U 2.2u | L_Wuerth_MAPI-4020 | L3 |
| 1 | Choke_Wurth_WE-CNSW_744232090 | L_CommonMode_Wurth_WE-CNSW-1206 | L4 |
| 3 | 4.7U 4.7u | C_0402_1005Metric_small_pads | C1, C4, C5 |
| 2 | 15P 15p | C_0402_1005Metric_small_pads | C2, C3 |
| 14 | 100N 100n | C_0402_1005Metric_small_pads | C6, C8, C9, C10, C11, C12, C13, C14 +6 |
| 2 | 4.7U 100n | C_0402_1005Metric_small_pads | C7, C20 |
| 2 | 10U 1u | C_0603_1608Metric | C18, C19 |
| 1 | 10U 22u | CP_Elec_4x5.4 | C21 |
| 1 | 10U 100n | C_0402_1005Metric_small_pads | C22 |
| 4 | 100N 1u | C_0603_1608Metric | C23, C24, C28, C29 |
| 2 | 100N 22u | CP_Elec_4x5.4 | C26, C31 |
| 16 | 100n | C_0402_1005Metric_small_pads | C32, C35, C37, C40, C42, C45, C47, C50 +8 |
| 12 | 1u | C_0603_1608Metric | C33, C34, C38, C39, C43, C44, C48, C49 +4 |
| 5 | 22u | CP_Elec_4x5.4 | C36, C41, C46, C51, C56 |
| 3 | 10u | C_0805_2012Metric | C69, C71, C72 |
| 5 | 22u | C_0805_2012Metric | C70, C74, C75, C76, C78 |
| 1 | 2.2n | C_0402_1005Metric_small_pads | C73 |
| 1 | 470n | C_0402_1005Metric_small_pads | C77 |
| 1 | 33 | R_0402_1005Metric | R1 |
| 3 | 1k | R_0402_1005Metric | R2, R3, R4 |
| 5 | 10K 10k | R_0402_1005Metric | R5, R6, R7, R17, R20 |
| 4 | 47K 10k | R_0402_1005Metric | R8, R27, R30, R32 |
| 1 | 169 10k | R_0402_1005Metric | R9 |
| 1 | 10K 27 | R_0402_1005Metric | R10 |
| 1 | 27 | R_0402_1005Metric | R11 |
| 14 | 10k | R_0402_1005Metric | R12, R15, R22, R25, R37, R40, R42, R45 +6 |
| 1 | 470 47k | R_0402_1005Metric | R13 |
| 1 | 100 39 | R_0603_1608Metric | R14 |
| 9 | 10k | R_0603_1608Metric | R16, R21, R26, R36, R41, R46, R51, R58 +1 |
| 1 | 10K 47k | R_0402_1005Metric | R18 |
| 1 | 10K 39 | R_0603_1608Metric | R19 |
| 4 | 47k | R_0402_1005Metric | R23, R38, R43, R48 |
| 4 | 39 | R_0603_1608Metric | R24, R39, R44, R49 |
| 1 | 47K 47k | R_0402_1005Metric | R28 |
| 1 | 49.9 39 | R_0603_1608Metric | R29 |
| 1 | 49.9 10k | R_0603_1608Metric | R31 |
| 1 | 49.9 47k | R_0402_1005Metric | R33 |
| 1 | 47K 39 | R_0603_1608Metric | R34 |
| 1 | 49.9 10k | R_0402_1005Metric | R35 |
| 2 | 100 | R_0603_1608Metric | R59, R60 |
| 11 | 470 | R_0603_1608Metric | R63, R64, R65, R66, R67, R68, R69, R70 +3 |
| 1 | 301k | R_0402_1005Metric | R75 |
| 1 | 100k | R_0402_1005Metric | R76 |
| 1 | 806k | R_0402_1005Metric | R77 |
| 1 | 91k | R_0402_1005Metric | R78 |
| 1 | 4.99k | R_0402_1005Metric | R79 |
| 1 | 15.6k | R_0402_1005Metric | R80 |
Opensync design files
The KiCad project lives in the ErichZimmer/OpenSync repository on GitHub; these links point at the commit this page was built from.
Opensync: common questions
What microcontroller does the Opensync use?
The Opensync is built around the NCP1117-3.3_SOT223, from the RP2040/RP2350 family.
How big is the Opensync PCB?
The Opensync measures 160 × 100 mm, has 4 copper layers and is 1.5842 mm thick.
How many components are on the Opensync?
220 components, from 75 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Opensync design files?
From the ErichZimmer/OpenSync repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Opensync design in my own project?
Yes, under the terms of its CERN-OHL-S-2.0 license, which ErichZimmer chose for the repository.
Can I test firmware for the Opensync without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.
More boards in OpenSync
RP2040/RP2350Opensync before chb h placement-20260915
160 × 100 mm233 parts2LCERN-OHL-S-2.04
RP2040/RP2350Final candidate
160 × 100 mm217 parts4LCERN-OHL-S-2.04
RP2040/RP2350Led stitched
160 × 100 mm217 parts4LCERN-OHL-S-2.04
RP2040/RP2350Agent entry vias
160 × 100 mm217 parts4LCERN-OHL-S-2.04
RP2040/RP2350Led draft
160 × 100 mm217 parts4LCERN-OHL-S-2.04
RP2040/RP2350Agent asc
160 × 100 mm217 parts4LCERN-OHL-S-2.04
RP2040/RP2350Candidate
160 × 100 mm217 parts4LCERN-OHL-S-2.04
RP2040/RP2350Before
160 × 100 mm217 parts4LCERN-OHL-S-2.04
RP2040/RP2350Opensync prototype
100 × 100 mm82 parts4LCERN-OHL-S-2.04
RP2040/RP2350Prototype eval
200 × 100 mm60 parts2LCERN-OHL-S-2.04
Opensync power supply eval
50 × 50 mm10 parts2LCERN-OHL-S-2.04
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