Fugu2
About the Fugu2 PCB
Fugu2 is an open source ESP32 PCB design by fl4p, published on GitHub. It is a 2-layer board measuring 50 × 88 mm, with 100 components from 50 distinct parts.
Its main chip is the ESP32-S3-WROOM-1-N4, from the ESP32 family. Other key parts include the UCC21330BQDRQ1, INA226AIDGSR and AP3012KTR-G1. By type, the board carries 35 resistors, 27 capacitors, 13 diodes, 9 transistors, 4 ICs and 4 connectors.
It belongs with the power & battery designs in this gallery.
From the project
Links: git | kicanvas | cadlab | docs | pdf schematics | IBOM (TODO) | firmware | additional docs & resources
Links: git | kicanvas | cadlab | docs | pdf schematics | IBOM (TODO) | firmware | additional docs & resources
Solar input voltage: 12 ~ 80V (higher voltage configurations possible, please create an issue if you need help with component selection) Battery output voltage: 12 ~ 60V (LiFePo4 4s ~ 16s) Max output current: 32 A Boost operation with input and output terminals swapped Efficiency Measurements Vin=72 Vout=27 Iout=32A: 98.17% (measured with INA228 & Riedon SSA-100, smart-shunt) * Vin=71.5 Vout=27.1 Iout=29.1A: 98.12% (measured with INA228, Riedon RSN20-50, DCCT DS200ID, details)
Main components on the Fugu2
Fugu2 bill of materials (BOM)
100 components, 50 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | DNP UCC21330BQDRQ1 | SOIC-16_3.9x9.9mm_P1.27mm | U1 |
| 1 | ESP32-S3-WROOM-1-N4 | ESP32-S3-WROOM-1-noPIN15 | U2 |
| 1 | INA226AIDGSR INA226 | VSSOP-10_3x3mm_P0.5mm | U3 |
| 1 | AP3012KTR-G1 AP3012 | SOT-23-5 | U5 |
| 2 | DNP IPA050N10NM5S | TO-220-3_Horizontal_BottomHeatsink_SmallHole | Q1, Q3 |
| 1 | DNP IPP022N12NM6 | TO-220-3_Horizontal_BottomHeatsink_NoHole | Q2 |
| 2 | BSS123-7-F BSS123 Diodes Incorporated | SOT-23 | Q4, Q9 |
| 3 | TPH1R306PL,L1Q TPH1R306PL,L1Q or NTMFS5C612NLT1G | Infineon_PG-TDSON-8_FL | Q5, Q6, Q7 |
| 1 | GT800N10D3 or SP010N90NJ GT800N10D3 | VSON-8_3.3x3.3mm_P0.65mm_NexFET | Q8 |
| 1 | DNP 3.3V PSU | PinHeader_1x03_P2.54mm_Vertical | J7 |
| 2 | DNP 691256610002 | TerminalBlock_WR-TBL_2566_1x02_P10.16mm | J9, J10 |
| 1 | SHOU HAN TYPE-C 16P QTGM027 QTGM027 | USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | P2 |
| 1 | SM2T3V3A ST | D_Powermite_KA | DZ1 |
| 1 | BZT52C16 or BZT52C13-TP BZT52C13-TP | D_SOD-123 | DZ2 |
| 2 | DNP 40A | Fuse_Blade_ATO_directSolderThin | F1, F3 |
| 1 | SMD1206B010TF/60 SMD1206B010TF/60 or 500mA fast, 50A EATON | Fuse_1206_3216Metric_Pad1.42x1.75mm_HandSolder | F2 |
| 1 | XUNPU TS-1088-AR02016 SW_Push | SW_Push_SPST_NO_Alps_SKRK | SW1 |
| 1 | NCP18XH103F03RB | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | TH1 |
| 2 | MSS1P4-M3/89A | D_MicroSMP_AK | D1, D17 |
| 1 | XINGLIGHT XL-5050RGBC-2812B-S WS2812B | LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm | D2 |
Show 30 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | LESD5D5.0CT1G | D_SOD-523 | D3, D4 |
| 5 | DSS310 SS310 Slkor | D_SOD-123 | D7, D8, D10, D11, D12 |
| 1 | DNP SMAJ85A | D_SMA | D13 |
| 1 | DNP ST15100S SMC | TO-277B_ThermalVias | D16 |
| 1 | BZX84C62LT1G 62V | SOT-23-3 | D18 |
| 1 | MLZ2012M100WT000 10uH | L_0805_2012Metric_Pad1.15x1.40mm_HandSolder | L2 |
| 5 | 100nF, X7R, 25V | C_0805_2012Metric | C2, C4, C6, C7, C25 |
| 3 | 1uF, 10V, X7S | C_0805_2012Metric | C3, C23, C30 |
| 1 | C0805C222K2GEC7800 2.2nF, 200V, X7S | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C8 |
| 4 | HMK212BC7105KGHTE 1uF, 100V, X7S | C_0805_2012Metric | C9, C14, C16, C27 |
| 2 | DNP 470uF, 100V | CP_Radial_D18.0mm_P7.50mm | C10, C12 |
| 1 | DNP 470uF, 100V | CP_Radial_D16.0mm_P7.50mm | C11 |
| 1 | HMK325C7475KN-TE 4.7uF, 100V | C_1210_3225Metric_Pad1.33x2.70mm_HandSolder | C13 |
| 4 | 10nF, 100V | C_0805_2012Metric | C15, C20, C24, C31 |
| 2 | HMK107C7224KAHTE 220nF, 100V, X7S | C_0603_1608Metric | C17, C18 |
| 2 | 10uF, 16V | C_0805_2012Metric | C19, C28 |
| 2 | GRM32EC72A106KE05L 10uF, 100V, X7S | C_1210_3225Metric_Pad1.33x2.70mm_HandSolder | C21, C22 |
| 1 | 20k | R_0805_2012Metric | R1 |
| 10 | 10k | R_0805_2012Metric | R2, R3, R8, R9, R13, R14, R15, R16 +2 |
| 3 | 4.7, 1% | R_0805_2012Metric | R4, R6, R10 |
| 2 | 2.2, 1% | R_0805_2012Metric | R5, R7 |
| 1 | 7.5 | R_1206_3216Metric | R11 |
| 5 | 200k | R_0805_2012Metric | R17, R18, R21, R43, R44 |
| 3 | 22 | R_0805_2012Metric | R19, R25, R27 |
| 1 | 7.5k | R_0805_2012Metric | R20 |
| 3 | 47k, 1% | R_0805_2012Metric | R22, R28, R29 |
| 1 | 1M | R_0805_2012Metric | R24 |
| 1 | LR2512D-3W-0.5mR-1% 0.0005 | R_2512_6332Metric_Pad2.72x3.40mm_HandSolder | R26 |
| 3 | 5.1k 1% | R_0402_1005Metric | R35, R36, R38 |
| 1 | 33k | R_0805_2012Metric | R37 |
Fugu2 design files
The KiCad project lives in the fl4p/Fugu2 repository on GitHub; these links point at the commit this page was built from.
Fugu2: common questions
What microcontroller does the Fugu2 use?
The Fugu2 is built around the ESP32-S3-WROOM-1-N4, from the ESP32 family.
How big is the Fugu2 PCB?
The Fugu2 measures 50 × 88 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Fugu2?
100 components, from 50 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 Fugu2 design files?
From the fl4p/Fugu2 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 Fugu2 design in my own project?
The repository has no license, so all rights stay with fl4p. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Fugu2 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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