NoU3
About the NoU3 PCB
NoU3 is an open source ESP32 PCB design by AlfredoSystems, published on GitHub. It is a 4-layer board measuring 46 × 56 mm, with 113 components from 67 distinct parts.
Its main chip is the ESP32-S3FN8, from the ESP32 family. Other key parts include the HR8833, CRYSTAL_ESP32, SERVOPORTS_2X3, C2681588 and USBLC6-2P6. By type, the board carries 36 capacitors, 20 resistors, 19 connectors, 17 ICs, 11 test points and 5 diodes.
Main components on the NoU3
NoU3 bill of materials (BOM)
113 components, 67 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | HR8833 | HR8833 | U1, U4, U5 |
| 1 | ESP32-S3FN8 | QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm | U2 |
| 1 | CRYSTAL_ESP32 Crystal_ESP32 | Crystal_SMD_2016-4Pin_2.0x1.6mm | U3 |
| 1 | HR8833 | HR8833 | U6 |
| 3 | SERVOPORTS_2X3 ServoPorts_2x3 | ServoPorts_2x3 | U7, U18, U19 |
| 1 | C2681588 5.8 ZSPT | XKB5858-Z-75 | U8 |
| 1 | USBLC6-2P6 | SOT-666 | U9 |
| 1 | PCA9685BS | QFN-28-1EP_6x6mm_P0.65mm_EP4.25x4.25mm | U10 |
| 1 | QWIIC1 Qwiic1 | JST_SH_BM04B-SRSS-TB_1x04-1MP_P1.00mm_Vertical | U11 |
| 2 | SY8113BADC | TSOT-23-6 | U15, U16 |
| 1 | C165948 USB_C_Receptacle | USB_TYPE-C-31-M-12 | U17 |
| 1 | LSM6DS3TR-C | Bosch_LGA-14_3x2.5mm_P0.5mm | U26 |
| 1 | AO3401A | SOT-23-small | Q1 |
| 4 | C160392 JST SR/SZ | JST_SH_1x06_Vertical | J1, J4, J7, J17 |
| 6 | SCREW_TERMINAL_01X02 Screw_Terminal_01x02 | TerminalBlock_Ningbo_2P_5mm | J2, J3, J5, J6, J8, J9 |
| 3 | JST SR/SZ | JST_SH_1x06_Vertical | J10, J13, J19 |
| 2 | Screw_Terminal_01x02 | TerminalBlock_Ningbo_2P_5mm | J11, J12 |
| 1 | RFANT3216120A5T | C_1206_3216Metric | J14 |
| 1 | C84007 Barrel_Jack | DC-005C_1 | J15 |
| 1 | VIN | PinSocket_1x01_P2.54mm_Vertical | J16 |
Show 47 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | GND | PinSocket_1x01_P2.54mm_Vertical | J18 |
| 1 | C115357 reset | Button_SKRKAEE020 | SW1 |
| 1 | C115357 boot | Button_SKRKAEE020 | SW2 |
| 1 | RX0 | PogoPad1 | TP1 |
| 1 | TX0 | PogoPad1 | TP2 |
| 2 | GND | PogoPad1 | TP3, TP9 |
| 1 | ECLK | PogoPad1 | TP4 |
| 1 | LED0 | PogoPad1 | TP5 |
| 1 | SCL | PogoPad1 | TP6 |
| 1 | SDA | PogoPad1 | TP7 |
| 1 | MOE | PogoPad1 | TP8 |
| 1 | Svin | PogoPad1 | TP20 |
| 1 | Sver | PogoPad1 | TP21 |
| 1 | Z5V6 | D_SOD-323 | D1 |
| 1 | 1N5819 | D_SOD-323 | D2 |
| 1 | Z3V3 | D_SOD-323 | D3 |
| 1 | C2895474 LED_Blue | LED_0603_1608Metric | D5 |
| 1 | C2895476 LED_green | LED_0603_1608Metric | D6 |
| 2 | 4.7UH 4.7uH | LVF252A12 | L1, L2 |
| 7 | 100NF 100nF | C_0402_1005Metric | C1, C15, C25, C26, C28, C29, C30 |
| 2 | 10uF | C_0805_2012Metric | C2, C11 |
| 4 | 10NF 10nF | C_0402_1005Metric | C3, C6, C9, C34 |
| 3 | 2.2UF 2.2uF | C_0402_1005Metric | C4, C7, C10 |
| 2 | 10UF 10uF | C_0805_2012Metric | C5, C8 |
| 1 | 10nF | C_0402_1005Metric | C12 |
| 1 | 2.2uF | C_0402_1005Metric | C13 |
| 1 | 100PF 100pF | C_0402_1005Metric | C14 |
| 1 | C4747974 220uF | CP_Elec_6.3x7.7 | C16 |
| 1 | 220uF | CP_Elec_6.3x7.7 | C20 |
| 1 | 10UF 10uF | C_0402_1005Metric | C21 |
| 2 | C96446 10uF,25V | C_0603_1608Metric | C22, C23 |
| 3 | 1UF 1uF | C_0402_1005Metric | C24, C27, C31 |
| 4 | 10PF 10pF | C_0402_1005Metric | C32, C33, C37, C38 |
| 2 | C59461 22uF, 6V3 | C_0603_1608Metric | C35, C36 |
| 1 | 100nF | C_0402_1005Metric | C40 |
| 3 | 1K | R_0402_1005Metric | R5, R17, R18 |
| 1 | 10K | R_0402_1005Metric | R10 |
| 1 | 68K 100K | R_0402_1005Metric | R11 |
| 1 | 15K 22K1 | R_0402_1005Metric | R12 |
| 1 | 33K 100K | R_0402_1005Metric | R13 |
| 1 | 4K7 13K7 | R_0402_1005Metric | R14 |
| 2 | 5.1K | R_0402_1005Metric | R15, R16 |
| 6 | 10K | R_0402_1005Metric | R19, R20, R21, R22, R23, R24 |
| 1 | 15K | R_0402_1005Metric | R26 |
| 1 | 2K2 | R_0402_1005Metric | R27 |
| 1 | 5.1K | R_0402_1005Metric | R29 |
| 1 | 6K8 3K3 | R_0402_1005Metric | R30 |
NoU3 design files
The KiCad project lives in the AlfredoSystems/NoU3-Hardware repository on GitHub; these links point at the commit this page was built from.
- LayoutNoU3.kicad_pcb
- SchematicNoU3.kicad_sch
- BOMNoU3-Lite/production/bom.csv
NoU3: common questions
What microcontroller does the NoU3 use?
The NoU3 is built around the ESP32-S3FN8, from the ESP32 family.
How big is the NoU3 PCB?
The NoU3 measures 46 × 56 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the NoU3?
113 components, from 67 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 NoU3 design files?
From the AlfredoSystems/NoU3-Hardware 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 NoU3 design in my own project?
The repository has no license, so all rights stay with AlfredoSystems. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the NoU3 without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.
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