INK TIME SMARTWATCH

1. DIAGRAMA COMPONENTE Acesta este un proiect de ceas inteligent bazat pe arhitectura nRF52840, echipat cu un ecran e-Paper pentru consum redus și un sistem de alertă haptică.

2. Bill Of Materials

Qty	Value	Device	Package	Parts	Description	ARROW_PART_NUMBER	ARROW_PRICE-STOCK	AVAILABILITY	CHECK_PRICES	COPYRIGHT	DESCRIPTION	HEIGHT	JLCPCB	MANUFACTURER_NAME	MANUFACTURER_PART_NUMBER	MF	MFR_NAME	MOUSER_PART_NUMBER	MOUSER_PRICE-STOCK	MP	PACKAGE	POPULARITY	PRICE	PROD_ID	PURCHASE-URL	SNAPEDA_LINK	TP_SIGNAL_NAME	U1	VALUE
1	RT6160AWSC	RT6160AWSC_RT6160AWSC	RT6160AWSC_BGA15C40P3X5_140X230X60	IC9	Buck-Boost Regulator Positive Output Step-Up/Step-Down I2C DC-DC Controller IC 15-WL-CSP (BSC) (1.4x2.3)						Buck-Boost Regulator Positive Output Step-Up/Step-Down I2C DC-DC Controller IC 15-WL-CSP (BSC) (1.4x2.3)	0.6mm		RICHTEK	RT6160AWSC			835-RT6160AWSC	https://www.mouser.co.uk/ProductDetail/Richtek/RT6160AWSC?qs=amGC7iS6iy%2FLd9PSoixZXQ%3D%3D
1	SI1308EDL-T1-GE3	ESP32_C6_LIBRARY_6_SI1308EDL-T1-GE3	ESP32_C6_LIBRARY_6_SOT65P210X110-3N	Q3	MOSFET N-Ch 30V 1.5A TrenchFET SC70 Vishay Si1308EDL-T1-GE3 N-channel MOSFET Transistor, 1.5 A, 30 V, 3-Pin SC-70			In Stock	https://www.snapeda.com/parts/SI1308EDL-T1-GE3/Vishay+Siliconix/view-part/?ref=eda		Si1308EDL-T1-GE3 N-channel MOSFET Transistor	1.5 A	30 V	3-Pin SC-70	Siliconix / Vishay SI1308EDL-T1-GE3					Vishay Siliconix				SI1308EDL-T1-GE3	SOT-323 Vishay Semiconductor		None		https://www.snapeda.com/api/url_track_click_mouser/?unipart_id=274603&manufacturer=Vishay Siliconix&part_name=SI1308EDL-T1-GE3&search_term=None
1	TC2030-IDC	TC2030-IDC_TC2030-IDC	TC2030-IDC_TC2030IDC	J2	CABLE ADAPTER 6 POS						CABLE ADAPTER 6 POS	19mm		Tag Connect	TC2030-IDC
1	USBLC6-2SC6Y	ESP32_C6_LIBRARY_3_USBLC6-2SC6Y	ESP32_C6_LIBRARY_3_SOT95P280X145-6N	D3	Low Cap. ESD Protection Auto SOT-23-6 STMicroelectronics USBLC6-2SC6Y, Dual Uni-Directional TVS Diode Array, 6-Pin SOT-23			In Stock	https://www.snapeda.com/parts/USBLC6-2SC6Y/STMicroelectronics/view-part/?ref=eda		17V Clamp 5A (8/20µs) Ipp Tvs Diode Surface Mount SOT-23-6					STMicroelectronics				USBLC6-2SC6Y	SOT-23-6 STMicroelectronics		None			https://www.snapeda.com/parts/USBLC6-2SC6Y/STMicroelectronics/view-part/?ref=snap
1	0.1uF/50V	NORDIC_NRF_3_CAPACITOR_0201_L	NORDIC_NRF_3_RESC0201_L	EPD_C5	Generic chip capacitor
1	0.47	CPF0201D7K68C1_CPF0201D7K68C1	CPF0201D7K68C1_0201	R1_EP_DR	7.68k 0201 Thin Film Surface Mount Fixed Resistor +/-0.5% 0.031W CPF0201D7K68C1
1	1.0µF	NORDIC_NRF_3_CAPACITOR_0201_L	NORDIC_NRF_3_RESC0201_L	C15	Generic chip capacitor
5	100nF	NORDIC_NRF_3_CAPACITOR_0201_L	NORDIC_NRF_3_RESC0201_L	C5, C7, C8, C12, C19	Generic chip capacitor
1	100pF	NORDIC_NRF_3_CAPACITOR_0201_L	NORDIC_NRF_3_RESC0201_L	C11	Generic chip capacitor
4	0.1uF	GRM011R60J152KE01L_2_GRM011R60J152KE01L	GRM011R60J152KE01L_2_CAPC0201X13N	C23, C27, C34, C42	Check availability			In Stock	https://www.snapeda.com/parts/GRM011R60J152KE01L/Murata/view-part/?ref=eda		SMD Capacitor X5R(EIA) with Capacitance: 1500pF Tol. 10%. Rated Voltage: 6.3Vdc					Murata				GRM011R60J152KE01L	0201 Murata		None			https://www.snapeda.com/parts/GRM011R60J152KE01L/Murata/view-part/?ref=snap
3	10K	CPF0201D7K68C1_CPF0201D7K68C1	CPF0201D7K68C1_0201	R2_EP_DR, R9, R_PWR_EPD	7.68k 0201 Thin Film Surface Mount Fixed Resistor +/-0.5% 0.031W CPF0201D7K68C1
3	10K	ERA-1AEB3401C_CPF0201D7K68C1	ERA-1AEB3401C_0201	R5, R7, R8	7.68k 0201 Thin Film Surface Mount Fixed Resistor +/-0.5% 0.031W CPF0201D7K68C1
1	10uF	NORDIC_NRF_3_CAPACITOR_0201_L	NORDIC_NRF_3_RESC0201_L	C1-EP-DR	Generic chip capacitor
2	10uF	PERFECT_0402_CAP_0402	PERFECT_0402_0402	C24, C39	0402 (1005 Metric)
1		ESP32_C6_LIBRARY_7_JUMPER_SJ	ESP32_C6_LIBRARY_7_JUMPER_SJ	SJ1	SMD solder JUMPER																	3
3	0	CPF0201D7K68C1_CPF0201D7K68C1	CPF0201D7K68C1_0201	R2, R3, R4	7.68k 0201 Thin Film Surface Mount Fixed Resistor +/-0.5% 0.031W CPF0201D7K68C1
1	10µH	NORDIC_NRF_2_INDUCTOR_0402_L	NORDIC_NRF_2_RESC0402_L	L2	Generic chip inductor
4	12pF	NORDIC_NRF_3_CAPACITOR_0201_L	NORDIC_NRF_3_RESC0201_L	C1, C2, C17, C18	Generic chip capacitor
1	15nH	NORDIC_NRF_2_INDUCTOR_0402_L	NORDIC_NRF_2_RESC0402_L	L3	Generic chip inductor
2	1pF	NORDIC_NRF_3_CAPACITOR_0201_L	NORDIC_NRF_3_RESC0201_L	C3, C4	Generic chip capacitor
6	1uF	GRM011R60J152KE01L_2_GRM011R60J152KE01L	GRM011R60J152KE01L_2_CAPC0201X13N	C29, C30, C31, C32, C37, C38	Check availability			In Stock	https://www.snapeda.com/parts/GRM011R60J152KE01L/Murata/view-part/?ref=eda		SMD Capacitor X5R(EIA) with Capacitance: 1500pF Tol. 10%. Rated Voltage: 6.3Vdc					Murata				GRM011R60J152KE01L	0201 Murata		None			https://www.snapeda.com/parts/GRM011R60J152KE01L/Murata/view-part/?ref=snap
9	1uF/50V	NORDIC_NRF_3_CAPACITOR_0201_L	NORDIC_NRF_3_RESC0201_L	EPD_C1, EPD_C2, EPD_C6, EPD_C7, EPD_C8, EPD_C9, EPD_C10, EPD_C11, EPD_C12	Generic chip capacitor
1	2.2	CPF0201D7K68C1_CPF0201D7K68C1	CPF0201D7K68C1_0201	R_TYPE_SEL	7.68k 0201 Thin Film Surface Mount Fixed Resistor +/-0.5% 0.031W CPF0201D7K68C1
3	2025-10-22_07-23-44_LIBRARY_EVP-AKE31A	2025-10-22_07-23-44_LIBRARY_EVP-AKE31A	2025-10-22_07-23-44_LIBRARY_SW_EVP-AKE31A_PAN	SW_DN, SW_ENT, SW_UP
1	20V/4.2A/52mΩ/1.4W	ESP32_C6_LIBRARY_4_ESP32_WROVER_SPARKFUN-DISCRETESEMI_MOSFET_PCH-DMG2305UX-7	ESP32_C6_LIBRARY_4_ESP32_C6_LIBRARY_4_ESP32_C6_LIBRARY_4_ESP32_C6_LIBRARY_4_ESP32_WROVER_SPARKFUN-DISCRETESEMI_SOT23-3	Q1	P-channel MOSFETs																			TRAN-14388					20V/4.2A/52mΩ/1.4W
2	22uF	PERFECT_0402_CAP_0402	PERFECT_0402_0402	C25, C33	0402 (1005 Metric)
1	2450AT18B100E	2450AT18B100E_2450AT18B100E	2450AT18B100E_ANTC3216X140N	ANT1	Antennas 2.45GHz ANTENNA	2450AT18B100E	https://www.arrow.com/en/products/2450at18b100e/johanson-dielectrics?utm_currency=USD&region=nac				Antennas 2.45GHz ANTENNA	1.4mm		JOHANSON TECHNOLOGY	2450AT18B100E			609-2450AT18B100E	https://www.mouser.co.uk/ProductDetail/Johanson-Technology/2450AT18B100E?qs=yCnrNFeXz%252Bh5MFsFIXGZGA%3D%3D
1	3.9nH	NORDIC_NRF_2_INDUCTOR_0402_L	NORDIC_NRF_2_RESC0402_L	L1	Generic chip inductor
1	32.768kHz	NORDIC_NRF_1_XTAL_32KHZ	NORDIC_NRF_1_XTAL_3215_N	X2
1	32MHz	NORDIC_NRF_XTAL_32MHZ	NORDIC_NRF_BT-XTAL_2016_N	X1
2	3K3	CPF0201D7K68C1_CPF0201D7K68C1	CPF0201D7K68C1_0201	R17, R18	7.68k 0201 Thin Film Surface Mount Fixed Resistor +/-0.5% 0.031W CPF0201D7K68C1
1	4.7uF	NORDIC_NRF_3_CAPACITOR_0201_L	NORDIC_NRF_3_RESC0201_L	C43	Generic chip capacitor
1	4.7uF/25V	NORDIC_NRF_3_CAPACITOR_0201_L	NORDIC_NRF_3_RESC0201_L	C2-EP-DR	Generic chip capacitor
4	4.7µF	NORDIC_NRF_3_CAPACITOR_0201_L	NORDIC_NRF_3_RESC0201_L	C6, C14, C20, C21	Generic chip capacitor
1	47nF	NORDIC_NRF_3_CAPACITOR_0201_L	NORDIC_NRF_3_RESC0201_L	C16	Generic chip capacitor
1	503480-2400	503480-2400_503480-2400	503480-2400_5034802400	J1	FFC & FPC Connectors 0.5mm FPC RA SMT Dual Contact 24Ckt						FFC & FPC Connectors 0.5mm FPC RA SMT Dual Contact 24Ckt	1.87mm		Molex	503480-2400			538-503480-2400	https://www.mouser.co.uk/ProductDetail/Molex/503480-2400?qs=OAhjpuo3Vu7efIoxFh9AOw%3D%3D
2	5K1	CPF0201D7K68C1_CPF0201D7K68C1	CPF0201D7K68C1_0201	R1_USB, R2_USB	7.68k 0201 Thin Film Surface Mount Fixed Resistor +/-0.5% 0.031W CPF0201D7K68C1
1	68uH	ESP32_C6_LIBRARY_2_744043680IND_4828-WE-TPC_WRE	ESP32_C6_LIBRARY_2_IND_4828-WE-TPC_WRE	L5						Copyright (C) 2024 Ultra Librarian. All rights reserved.					744043680		Wurth Electronics
1	820pF N.C.	NORDIC_NRF_3_CAPACITOR_0201_L	NORDIC_NRF_3_RESC0201_L	C9	Generic chip capacitor
1	BMA421	BMA423_BMA423	BMA423_BMA423	IC3	Accelerometers Triaxial low-g 12bit Acceleration Sensor	BMA423	https://www.arrow.com/en/products/bma423/bosch				Accelerometers Triaxial low-g 12bit Acceleration Sensor	1mm		BOSCH	BMA423			262-BMA423	https://www.mouser.co.uk/ProductDetail/Bosch-Sensortec/BMA423?qs=HXFqYaX1Q2xC%252BSgeGoX3mg%3D%3D
1	BQ25180YBGR	BQ25180YBGR_BQ25180YBGR	BQ25180YBGR_BGA8C40P2X4_100X155X50	IC1	Charger IC Lithium Ion/Polymer, Lithium Iron Phosphate 8-DSBGA (1.6x1.1)	BQ25180YBGR	https://www.arrow.com/en/products/bq25180ybgr/texas-instruments?utm_currency=USD&region=nac				Charger IC Lithium Ion/Polymer	Lithium Iron Phosphate 8-DSBGA (1.6x1.1)	0.5mm		Texas Instruments	BQ25180YBGR			595-BQ25180YBGR	https://www.mouser.co.uk/ProductDetail/Texas-Instruments/BQ25180YBGR?qs=doiCPypUmgEWjAK%252BJAX6Tw%3D%3D
1	DRV2605YZFR	DRV2605YZFR_DRV2605YZFR	DRV2605YZFR_BGA9C50P3X3_144X144X62	IC2	Haptic Driver for ERM/LRA with Built-In Library and Smart Loop Architecture	DRV2605YZFR	https://www.arrow.com/en/products/drv2605yzfr/texas-instruments?region=nac				Haptic Driver for ERM/LRA with Built-In Library and Smart Loop Architecture	0.625mm		Texas Instruments	DRV2605YZFR
1	FTC252012SR47MBCA	MLP2016SR47MT0S1_FTC252012SR47MBCA	MLP2016SR47MT0S1_INDC2016X100N	L7	SMD / SMT Inductors (Coils), L=0.47?H, L x W x T :						SMD / SMT Inductors (Coils)	L=0.47?H	L x W x T :	1mm	https://jlcpcb.com/partdetail/6763488-FTC252012SR47MBCA/C5832368	TDK	FTC252012SR47MBCA
14	HECTOR_WATCH_1_TPTP20R	HECTOR_WATCH_1_TPTP20R	HECTOR_WATCH_1_TP20R	TP_3.3V, TP_3V3, TP_BAT_GND, TP_GND, TP_ON, TP_OP, TP_RESET, TP_SCL, TP_SDA, TP_SWDCLK, TP_SWDIO, TP_SWO, TP_VBAT, TP_VREG	Test pad																	2
1	KH-TYPE-C-16P	KH-TYPE-C-16P_KH-TYPE-C-16P	KH-TYPE-C-16P_KINGHELM_KH-TYPE-C-16P	J4	Check availability			Not in stock	https://www.snapeda.com/parts/KH-TYPE-C-16P/Kinghelm/view-part/?ref=eda							kinghelm				KH-TYPE-C-16P	None		None			https://www.snapeda.com/parts/KH-TYPE-C-16P/Kinghelm/view-part/?ref=snap
1	MAX17048G+T10	ESP32_C6_LIBRARY_MAX17048G+T10	ESP32_C6_LIBRARY_SON50P200X200X80-9N	U2	Check availability			In Stock	https://www.snapeda.com/parts/MAX17048G+T10/Analog+Devices/view-part/?ref=eda		3µA 1-Cell/2-Cell Fuel Gauge with ModelGauge					Analog Devices				MAX17048G+T10	TDFN-8 Maxim		None		https://www.snapeda.com/api/url_track_click_mouser/?unipart_id=329239&manufacturer=Analog Devices&part_name=MAX17048G+T10&search_term=None	https://www.snapeda.com/parts/MAX17048G+T10/Analog+Devices/view-part/?ref=snap
3	MBR0530	ESP32_C6_LIBRARY_5_MBR0530	ESP32_C6_LIBRARY_5_SOD3716X135N	D2, D4, D5	ON SEMICONDUCTOR - MBR0530 - DIODE, SCHOTTKY, 0.5A, 30V, SOD-123			In Stock	https://www.snapeda.com/parts/MBR0530/Onsemi/view-part/?ref=eda		Diode Schottky 30 V 500mA Surface Mount SOD-123					ON Semiconductor				MBR0530	SOD-123-2 ON Semiconductor		None		https://www.snapeda.com/api/url_track_click_mouser/?unipart_id=179458&manufacturer=ON Semiconductor&part_name=MBR0530&search_term=None	https://www.snapeda.com/parts/MBR0530/Onsemi/view-part/?ref=snap
3	N.C.	NORDIC_NRF_3_CAPACITOR_0201_L	NORDIC_NRF_3_RESC0201_L	C10, C13, C22	Generic chip capacitor
1	NRF52840 _QF	NORDIC_NRF_4_NRF52840_QF	NORDIC_NRF_4_AQFN50P700X700X85_HS-74N	U1	nRF52840																							NRF52840 _QF

3. DESCRIEREA FUNCTIONALITATII HARDWARE

Sistemul este construit in jurul SoC-ului nRF52840, fiind optimizat pentru un consum ultra-scazut de energie si securitate hardware.

Module si Componente Cheie: Microcontroller (nRF52840): Procesor ARM Cortex-M4F cu unitate de criptare hardware CryptoCell-310. Acesta gestioneaza stack-ul Bluetooth Low Energy (BLE) si coordoneaza toate perifericele.

Sistemul de Putere (Power Tree):

BQ25180: IC de incarcare cu Power Path. Permite incarcarea bateriei LiPo si alimentarea simultana a sistemului.

MAX17048: Fuel Gauge (indicator nivel baterie). Masoara precis starea de incarcare (SoC) si tensiunea bateriei, comunicand prin I2C.

RT6160: Regulator Buck-Boost care asigura o tensiune stabila de 3.3V indiferent de nivelul de descarcare al bateriei.

Senzor de Miscare (BMA421): Accelerometru triaxial de mica putere. Este folosit pentru pedometru (numararea pasilor) si detectarea gesturilor (ex: "tilt-to-wake").

Afisaj e-Paper (1.54"): Display de tip "Electronic Ink" care consuma curent doar la refresh. Include un circuit de protectie cu un PFET (SI2301CDS) pentru a opri complet alimentarea ecranului in standby, eliminand scurgerile de curent.

Driver Haptic (DRV2605L): Controleaza motorul de vibratii (Shaker) folosind librarii de efecte pre-programate pentru un feedback tactil premium.

Cristal 32 MHz (X1): Esențial pentru funcționarea blocului radio (Bluetooth). Acesta oferă referința de înaltă frecvență necesară pentru stabilitatea semnalului și procesarea rapidă a datelor.

Cristal 32.768 kHz (X2): Componentă critică pentru optimizarea consumului. Acesta permite funcționarea ceasului de timp real (RTC) în modurile de Deep Sleep, menținând precizia timpului cu un consum infim de energie, fără a fi nevoie de oscilatorul intern RC (care este mai puțin precis și consumă mai mult).

Antena: Sistemul utilizează o antenă de tip traseu pe cablaj (Trace Antenna), calculată pentru frecvența de 2.4 GHz (Bluetooth Low Energy).Pentru a asigura o rază de acțiune maximă, s-a respectat o zonă de "Keep-out" (fără cupru) pe toate straturile sub antenă, prevenind astfel atenuarea semnalului.

Interfete de Comunicatie: I2C (SDA/SCL): Magistrala principala de senzori unde sunt conectate: BMA421, DRV2605L, BQ25180 si MAX17048.

SPI: Interfata de mare viteza folosita exclusiv pentru ecranul e-Paper.

PWM: Folosit pentru controlul intensitatii vibratiilor shaker-ului.

Procesare si Energie: Procesare: Cipul ruleaza la 64MHz, dar sta majoritatea timpului in System ON Sleep mode (~3uA).

Consum: Bateria de 250mAh sustine o autonomie estimata de 30-45 zile, avand in vedere ca ecranul nu consuma energie intre update-uri si senzorii sunt configurati pe modul de consum minim cu intreruperi.

4. Configuratia Pinilor nRF52840

Componenta	Pin nRF52	Functie	Motivatie Tehnica
I2C SCL	P0.27	Clock	Pin dedicat pentru magistrala de senzori (I2C).
I2C SDA	P0.26	Data	Linie de date partajata intre BMA421, Gauge si Charger.
EPD SCK	P0.28	SPI Clock	Pin de mare viteza pentru refresh-ul ecranului.
EPD MOSI	P0.29	SPI Data	Transferul buffer-ului de imagine catre display.
EPD CS	P0.30	Chip Select	Activarea comunicatiei cu ecranul.
EPD DC	P0.31	Data/Cmd	Pin necesar pentru protocolul e-Paper (comenzi vs date).
EPD BUSY	P0.04	Input	Monitorizeaza cand ecranul a terminat actualizarea.
Shaker	P0.02	PWM/EN	Pin capabil de PWM pentru controlul driverului haptic.
Buton UP	P1.00	GPIO	Pin cu intrerupere pentru navigare meniu (sus).
Buton DN	P1.01	GPIO	Pin cu intrerupere pentru navigare meniu (jos).
Buton ENT	P1.02	GPIO	Pin cu intrerupere pentru selectie/confirmare.
LED 1/2	P0.13, P0.14	Output	LED-uri de stare pentru notificari vizuale rapide.

IMAGINI