4 layers99 × 84 mm
Robotic arm controller
bejaouihamza/robotic_arm_controller
Traditional servo controllers simply send PWM signals. This board goes further:
140 parts
4 layers72 × 44 mm
Picflash board
nthclrd/picflash1Programmeur PIC open source en Rust : remplace MPLAB IPE/XC8 pour les PIC16, pilote les PICkit 4/5/Basic ou une carte RP2040 maison (KiCad)
- Size
- 72 × 44 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 115
- Nets
- 75
- Pads
- 364
- Tracks, vias
- 899, 214
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 15 Oct 2026
- Updated
- 15 Oct 2026
Overview
Picflash board is an open-source printed circuit board by nthclrd, from the nthclrd/picflash repository on GitHub, published under the MIT licence. It is a 4-layer board of 72 × 44 mm with 115 parts on 75 nets, routed with 899 tracks and 214 vias.
It is built around the RP2040, MT3608 and W25Q16JVSSIQ, with the SN74LVC1T45DBV, AP2112K-3.3 and TLV75801PDBV among its other parts. Its parts include 45 resistors, 37 capacitors, 12 ICs, 5 diodes and 3 transistors. It belongs with the RP2040 boards of this library.
Main components
10
RP2040
LQFN-56(7x7)12bit 133MHz 30 LQFN-56(7x7) Microcontrollers (MCU/MPU/SOC) ROHSRaspberry PiMicrocontrollers (MCU/MPU/SOC)
MT3608
SOT-23-6-40℃~+85℃ 1 1.2MHz 100uA、1.6mA 2A 2V~24V Adjustable Boost Boost Built-in No SOT-23-6 DC-DC Converters ROHS西安航天民芯DC-DC Converters
W25Q16JVSSIQ
SOIC-8-208mil-40℃~+85℃ 100,000 cycles 10uA 133MHz 16Mbit 2.7V~3.6V 20 Years 3ms SPI SOIC-8-208mil NOR FLASH ROHSWinbondNOR FLASHSN74LVC1T45DBV
SOT-23-6-40℃~+85℃ 1 1 1.65V~5.5V 1.65V~5.5V 420Mbps Bidirectional Tri-State SOT-23-6 Translators, Level Shifters ROHSTexas InstrumentsTranslators, Level Shifters
AP2112K-3.3
SOT253.3V 600mA CMOS Low Dropout Linear Regulator with EnableDiodes IncorporatedUncategorisedTLV75801PDBV
SOT-23-5-40℃~+125℃@(Tj) 1 130mV@(500mA) 25uA 30uVrms 500mA 50dB@(1kHz) 550mV~5.5V 6V Adjustable Positive Under Voltage Lockout、Soft Start、Short Circuit Protection、Thermal Shutdown SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTexas InstrumentsVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsUSBLC6-2SC6
SOT-23-60.35pF、0.8pF 100nA 150W@8/20us 15V 2 5V 6A@8/20us 6V ESD SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSUMWESD And Surge Protection (TVS/ESD)
AO3401A
SOT-231 P-Channel 14nC@10V 30V 47mΩ@10V、60mΩ@4.5V、85mΩ@2.5V 4A 55pF 645pF 80pF 900mV SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs
BAT54WS
SOD-3231 Independent 100mA 1V@100mA 2uA@25V 30V 600mA SOD-323 Schottky Diodes ROHSDiodes IncorporatedSchottky Diodes
SS34
SMA(DO-214AC)-55℃~+125℃ 3A 40V 500uA@40V 550mV@3A Independent SMA(DO-214AC) Schottky Diodes ROHSMDDSchottky Diodes
README
hardware/README.mdCarte picflash (RP2040)
Design original tiré des datasheets publiques (RP2040, MT3608, TLV758, SN74LVC1T45). Non testé, à relire avant fabrication.
Générer
Le schéma et le PCB sont générés par les scripts de tools/ : la netlist
Python (tools/gen_schematic.py) est la source de vérité.
make all FREEROUTING=/chemin/freerouting-2.4.1.jarÉtapes : schéma généré et vérifié net par net, placement, routage automatique
(Freerouting), plans de masse, ERC/DRC (0 erreur), puis fab/ : Gerber,
perçages, BOM et CPL au format JLCPCB. Chaque pièce de la BOM a un numéro LCSC
(stock vérifié le 15/10/2026, à revérifier à la commande).
Carte 72 × 44 mm, 4 couches (In1 masse, In2 +3,3 V), composants sur une face.
Blocs
| Bloc | Composants | Rôle |
|---|---|---|
| USB | J1 USB-C, U2 USBLC6, F1 | alimentation 5 V, données protégées |
| 3,3 V | U3 AP2112K | logique |
| MCU | U1 RP2040, U4 flash, Y1 12 MHz | |
| Lignes ICSP | U5-U9 SN74LVC1T45 | adaptation 1,65-5,5 V, haute impédance au démarrage |
| VPP | U11 MT3608 | 6,7-13,9 V, réglé par PWM, mesuré sur ADC1 |
| VDD cible | U12 TLV75801 | 1,5-4,86 V, réglé par PWM, mesuré sur ADC0 |
| MCLR | Q1, U10 + D5, Q3 | VPP, niveau VDD ou masse |
| Connecteur | J2 8 broches | brochage PICkit 4/5 |
Brochage GPIO : firmware/src/hw_board.rs.
Règles pour le firmware
- Ne jamais activer VPP_ON et MCLR_PD en même temps.
- PWM à 0 = tension max (13,9 V pour VPP) : fixer le PWM avant d'activer le régulateur.
- Avant d'alimenter la cible, vérifier sur ADC0 qu'aucune alimentation externe n'est présente.
Avant de commander
- Relire le routage automatique : masse sous l'USB, boucle du MT3608, pistes VPP/MCLR.
- Vérifier les rotations du CPL dans l'aperçu JLCPCB.
- Valeurs à valider sur la première carte : self 22 µH, stabilité des régulateurs avec l'injection PWM.
- J2 est traversant : assemblage THT ou soudure à la main.
Parts
115| Qty | Value | Footprint | References |
|---|---|---|---|
| 24 | 100n | Capacitor_SMD:C_0603_1608Metric | C10, C11, C12, C13, C16, C17, C20, C21, C22, C23, C24, C25, C26, C27, C28, C29 +8 |
| 15 | 10k | Resistor_SMD:R_0603_1608Metric | R5, R6, R9, R21, R23, R25, R27, R29, R31, R41, R43, R48, R49, R61, R63 |
| 7 | 100k | Resistor_SMD:R_0603_1608Metric | R30, R44, R46, R50, R51, R64, R65 |
| 7 | 1u | Capacitor_SMD:C_0603_1608Metric | C1, C14, C15, C41, C50, C51, C52 |
| 6 | 100 | Resistor_SMD:R_0603_1608Metric | R20, R22, R24, R26, R28, R52 |
| 6 | SN74LVC1T45DBV | Package_TO_SOT_SMD:SOT-23-6 | U5, U6, U7, U8, U9, U10 |
| 3 | 330 | Resistor_SMD:R_0603_1608Metric | R10, R11, R12 |
| 2 | 10u | Capacitor_SMD:C_0805_2012Metric | C2, C43 |
| 2 | 15p | Capacitor_SMD:C_0603_1608Metric | C4, C5 |
| 2 | 1k | Resistor_SMD:R_0603_1608Metric | R7, R8 |
| 2 | 27 | Resistor_SMD:R_0603_1608Metric | R3, R4 |
| 2 | 2N7002 | Package_TO_SOT_SMD:SOT-23 | Q2, Q3 |
| 2 | 5.1k | Resistor_SMD:R_0603_1608Metric | R1, R2 |
| 1 | 12MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | 15k | Resistor_SMD:R_0603_1608Metric | R62 |
| 1 | 200k | Resistor_SMD:R_0603_1608Metric | R40 |
| 1 | 220 | Resistor_SMD:R_0603_1608Metric | R53 |
| 1 | 22k | Resistor_SMD:R_0603_1608Metric | R47 |
| 1 | 22u 10V | Capacitor_SMD:C_0805_2012Metric | C3 |
| 1 | 22u 25V | Capacitor_SMD:C_1206_3216Metric | C40 |
| 1 | 22uH | Inductor_SMD:L_Cenker_CKCS4030 | L1 |
| 1 | 47k | Resistor_SMD:R_0603_1608Metric | R45 |
| 1 | 500mA | Fuse:Fuse_1206_3216Metric | F1 |
| 1 | 56k | Resistor_SMD:R_0603_1608Metric | R60 |
| 1 | 68k | Resistor_SMD:R_0603_1608Metric | R66 |
| 1 | 82k | Resistor_SMD:R_0603_1608Metric | R42 |
| 1 | AO3401A | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | AP2112K-3.3 | Package_TO_SOT_SMD:SOT-23-5 | U3 |
| 1 | BAT54WS | Diode_SMD:D_SOD-323 | D5 |
| 1 | BOOTSEL | Button_Switch_SMD:SW_SPST_PTS810 | SW1 |
| 1 | DBG_RX | TestPoint:TestPoint_Pad_D1.0mm | TP2 |
| 1 | DBG_TX | TestPoint:TestPoint_Pad_D1.0mm | TP1 |
| 1 | GND | TestPoint:TestPoint_Pad_D1.0mm | TP5 |
| 1 | ICSP | Connector_PinSocket_2.54mm:PinSocket_1x08_P2.54mm_Horizontal | J2 |
| 1 | MT3608 | Package_TO_SOT_SMD:SOT-23-6 | U11 |
| 1 | RESET | Button_Switch_SMD:SW_SPST_PTS810 | SW2 |
| 1 | RP2040 | Package_DFN_QFN:QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm | U1 |
| 1 | SS34 | Diode_SMD:D_SMA | D1 |
| 1 | SWD | Connector_PinHeader_1.27mm:PinHeader_1x03_P1.27mm_Vertical | J3 |
| 1 | TLV75801PDBV | Package_TO_SOT_SMD:SOT-23-5 | U12 |
| 1 | TVDD | TestPoint:TestPoint_Pad_D1.0mm | TP4 |
| 1 | USB-C | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1 |
| 1 | USBLC6-2SC6 | Package_TO_SOT_SMD:SOT-23-6 | U2 |
| 1 | VPP_RAW | TestPoint:TestPoint_Pad_D1.0mm | TP3 |
| 1 | W25Q16JVSSIQ | Package_SO:SOIC-8_5.3x5.3mm_P1.27mm | U4 |
| 1 | green | LED_SMD:LED_0603_1608Metric | D2 |
| 1 | red | LED_SMD:LED_0603_1608Metric | D4 |
| 1 | yellow | LED_SMD:LED_0603_1608Metric | D3 |
Questions
How big is the Picflash board PCB?
It measures 72 × 44 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Picflash board use?
115 parts, built around the RP2040, MT3608, W25Q16JVSSIQ and SN74LVC1T45DBV. 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 Picflash board KiCad files?
From the nthclrd/picflash repository on GitHub, at the commit this page was made from: the board is hardware/picflash-board.kicad_pcb and its schematic hardware/picflash-board.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Picflash board 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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