Digitálne Hodinky s Alarmom

flux

Áno, bude to fungovať – stačí opraviť tieto chyby. Nižšie máš jednoduchý návod „A -> B“ a odkazy na diely z Techfun. Opravy sú krátke.
Čo teraz hlási kontrola v projekte
  • Chýba napájanie pre MCU, U1, RTC.
  • Net SCL má len jeden pin (SCL z RTC nie je pripojený na MCU).
  • Generické súčiastky bez MPN: R1, R2, R3, R4, C1.
Ako opraviť (jednoduché kroky)
  1. Napájanie 3× AA
  • bat -> D1 Anóda.
  • D1 Katóda -> SW1 stredný pin.
  • SW1 výstupný pin -> Net „VCC“ (u teba je to RTC).
  • bat- -> Ground.
  • C1 10uF: P1 -> VCC, P2 -> Ground.
  • Pozn.: Schottky dióda je OK kvôli ochrane polarity.
  1. I2C SCL chýba
  • MCU PC5 (SCL) -> RTC SCL.
  • MCU PC4 (SDA) už ide -> RTC SDA (nechaj).
  • Pull‑upy:
    • R1 4.7k: P1 -> SDA, P2 -> VCC.
    • R2 4.7k: P1 -> SCL, P2 -> VCC.
  • Tip pre batérie: môžeš dať 10k namiesto 4.7k (nižší trvalý odber). Limit kapacity zbernice je 400 pF.
  1. Decoupling (100 nF)
  • C2 100nF: P1 -> VCC MCU, P2 -> Ground. Umiestni blízko pinov.
  • C3 100nF: P1 -> VCC RTC, P2 -> Ground.
  • C4: nechaj AREF -> Ground (je OK).
  1. Tlačidlá (použiješ 3 kusy)
  • SW2 -> MODE: Pin1 -> Ground, Pin2 -> MCU PB0.
  • SW5 -> +1: Pin1 -> Ground, Pin2 -> MCU PB1.
  • SW6 -> −1: Pin1 -> Ground, Pin2 -> MCU PB2.
  • V MCU zapni interné pull‑upy na PB0, PB1, PB2.
  1. Displej TM1637
  • U1 VCC -> VCC. GND -> Ground.
  • U1 DIO -> MCU PD4.
  • U1 CLK -> MCU PD3.
  1. Vymeň „Generic“ diely za reálne (zmiznú MPN chyby)
Nakúpiš na Techfun (čo potrebné reálne nájdeš)
Voliteľné zapojenie bzučiaka (ak ho pridáš)
  • Buzzer „+“ -> VCC.
  • Buzzer „−“ -> Kolektor 2N2222.
  • 2N2222 Emitter -> Ground.
  • MCU pin -> 1k -> Báza 2N2222.
  • 10k -> Báza 2N2222 -> Ground.
  • (Ak pasívny magnetický buzzer) dióda paralelne cez buzzer: Katóda -> „+“, Anóda -> „−“.
Po tomto by mali zmiznúť chyby
  • „Missing Power“ zmizne po pripojení [+bat] a [bat-] tak, ako je hore.
  • „Single pin net“ zmizne po spojení PC5 (SCL) -> SCL [RTC].
  • „Manufacturer Part Number“ zmizne po výmene [R1]–[R4] a [C1] za reálne diely z knižnice.
Chceš, aby som tieto úpravy spravil priamo v projekte (pripojiť SCL, dopojiť napájanie, nastaviť pull‑upy a nahradiť generiky za diely s MPN)? Stačí napísať „Áno“ a idem na to.
Chcem opraviť napájanie
Chcem pridať I2C pull-upy
Chcem vyriešiť generické diely
Skontroluj DS3231 napájanie
Upresním batériový držiak
MCU
Not Recommended for New Designs
C1
Capacitance
10uF
  • Generic Inductor
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  • Generic Capacitor
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Spare Indigo Power Laces

Spare Indigo Power Laces thumbnail
digital clock

Properties

Properties describe core aspects of the project.

Pricing & Availability

Distributor

Qty 1

Arrow

$10.27–$17.26

Digi-Key

$21.23–$27.12

LCSC

$17.05–$18.75

Mouser

$27.07–$27.13

TME

$3.53

Verical

$9.96–$20.19

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