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4 layers30 × 60 mmPot fleur, the printed circuit board in 3D

Ouvrir potfleur.kicadpro. Le schéma racine potfleur.kicadsch réunit les feuilles RAK3172, capteur SHT40 et alimentation BQ25570.

Size
30 × 60 mm
Copper layers
4
Thickness
0.8 mm
Parts
50
Nets
45
Pads
169
Tracks, vias
749, 75
Pours
4
Routed
Yes
KiCad
KiCad 10.0 (file 20260206)
Created
5 Oct 2026
Updated
4 Nov 2026

Overview

Pot fleur is an open-source printed circuit board by MaxBarbe, from the MaxBarbe/SmartPot_RAK3172 repository on GitHub. It is a 4-layer board of 30 × 60 mm with 50 parts on 45 nets, routed with 749 tracks and 75 vias.

It is built around the SHT40-AD1B-R2 and B3U-1000P. Its parts include 9 connectors, 7 capacitors, 5 resistors, 3 ICs and 2 switches.

Main components

2

README

old/pot_fleur/README.md

Électronique SmartPot — projet KiCad actif

Ouvrir pot_fleur.kicad_pro. Le schéma racine pot_fleur.kicad_sch réunit les feuilles RAK3172, capteur SHT40 et alimentation BQ25570.

PCB actuel

Carte préliminaire de 30 × 60 mm sur quatre couches, 48 empreintes présentes et 12 non montées, broches sur les côtés. C22 est volontairement non monté. R6/C6/L1 sont en 0603 ; ce boîtier est une contrainte du projet.

L’antenne CST finale remplace maintenant l’ancienne antenne TI sur A1. La géométrie a été légèrement ajustée pour conserver le PCB 30 × 60 mm, et un raccord RF physique a été ajouté. Voir la fiche d’intégration et l’aperçu. Une resimulation est nécessaire ; les captures CST originales ne valident pas encore cette adaptation.

Les valeurs ROK1=4,12 MΩ, ROK2=7,87 MΩ et ROK3=1,02 MΩ donnent les seuils nominaux étudiés d'environ 3,52 / 3,82 V ; le réseau de surtension reste ROV1=7,15 MΩ et ROV2=8,66 MΩ. Ces valeurs ne remplacent pas une vérification des tolérances et du fonctionnement réel.

Les bibliothèques d'empreintes et de symboles locales sont déclarées dans fp-lib-table et sym-lib-table. Les chemins utilisent ${KIPRJMOD} ; conserver les dossiers footprints, symbols et 3dmodels avec le projet. Les ressources pédagogiques ont été déplacées dans references/EDU_RAK_2026.

Les rapports sans erreur ne valident pas la performance RF ou l'alimentation. Le placement de CREF1, CBYP1, CIN2 et LBUCK1 doit être revu autour de U3. L'empilage quatre couches reste à confirmer avec le fabricant.

Export mécanique et visualisation 3D

Carte assemblée STEP, carte nue STEP, vues 3D et références des modèles. Les modèles manquants de RAK3172, BQ25570, SHT40 et LBOOST1 ont été complétés sans modification du routage. Les modèles DNP sont exclus du STEP assemblé.

Parts

50
QtyValueFootprintReferences
7RResistor_SMD:R_0603_1608MetricROK1B1, ROK2B1, ROK3B1, ROUT1B1, ROUT2B1, ROV1B1, ROV2B1
5100nFCapacitor_SMD:C_0603_1608MetricC3, C4, C5, CBYP1, CIN1
4Conn_01x04_PinConnector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_VerticalJ1, J2, J4, J7
20Resistor_SMD:R_0603_1608MetricR4, R6
222uFCapacitor_SMD:C_0603_1608MetricCOUT1, CSTOR1
24,7kResistor_SMD:R_0603_1608MetricR8, R9
2B3U-1000PButton_Switch_SMD:SW_SPST_B3U-1000PSW1, SW2
2Conn_01x02_PinConnector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_VerticalJ5, J6
2MountingHole_3mmMountingHole_3mmH1, H2
11.02MResistor_SMD:R_0603_1608MetricROK3
1100kResistor_SMD:R_0603_1608MetricR3
1100uFCapacitor_SMD:C_0603_1608MetricC22
110nFCapacitor_SMD:C_0603_1608MetricCREF1
110uHInductor_SMD:L_1008_2520MetricLBUCK1
122uHLBOOST:IND_LPS4018-223MRCLBOOST1
14.12MResistor_SMD:R_0603_1608MetricROK1
14.64MResistor_SMD:R_0603_1608MetricROUT1
14.7uFCapacitor_SMD:C_0603_1608MetricCIN2
17.15MResistor_SMD:R_0603_1608MetricROV1
17.87MResistor_SMD:R_0603_1608MetricROK2
18.25MResistor_SMD:R_0603_1608MetricROUT2
18.66MResistor_SMD:R_0603_1608MetricROV2
1BQ25570Package_DFN_QFN:QFN-20-1EP_3.5x3.5mm_P0.5mm_EP2x2mmU3
1Conn_01x02_SocketConnector_PinSocket_2.54mm:PinSocket_1x02_P2.54mm_VerticalJ19
1Conn_Coaxial_SmallConnector_Coaxial:U.FL_Hirose_U.FL-R-SMT-1_VerticalJ3
1DNPInductor_SMD:L_0603_1608MetricL1
1DNPCapacitor_SMD:C_0603_1608MetricC6
1P-MFCTerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-3-2-5.08_1x02_P5.08mm_HorizontalJ10
1PCB_868MHz_CST_IFASmartPot_RF:CST_IFA_868MHz_SmartPotA1
1RAK3172-xx-8-SM-xIRF_Module:RAK3172U1
1SHT40-AD1B-R2SHT40:SHT4XU4

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Questions

How big is the Pot fleur PCB?

It measures 30 × 60 mm and has 4 copper layers, 0.8 mm thick.

What parts does the Pot fleur use?

50 parts, built around the SHT40-AD1B-R2 and B3U-1000P. 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 Pot fleur KiCad files?

From the MaxBarbe/SmartPot_RAK3172 repository on GitHub, at the commit this page was made from: the board is old/pot_fleur/pot_fleur.kicad_pcb and its schematic old/pot_fleur/BQ25570.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Pot fleur design in my own project?

Its repository states no licence, so its author keeps all rights: ask MaxBarbe before reusing the design.