4 bit digital electronic clock chip DIY

4 bit digital electronic clock chip DIY View larger

JOMYFT_clock_kit

New product

12 Items

3,33€ Tax excluded

Delivery: 1-5 days

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Features

Special red digital clock for display;
AT89C2051 master chip;
1.2mm thick PCB made from FR-4 board;
time error range -1 to +1 seconds every 24 hours.
Supply with 5V

Functions

Second corrections
Iterface: hours/minutes or minutes/seconds
ON/OFF alarm sound
Two alarm settings (you can turn off the alarm function)

Components

 

Name

Specification

Quantity

Identifier

0.25w resistance

4.7K

5

R1.R3-R6

Exclusion

470*9

1

R2

electrolytic capacitor

10uf

1

C1

 

100UF

1

C4

ceramic capacitor

30p

2

C2, C3

 

104

1

C5

diode

IN4007

2

D1, D2

Nixie tube

0.4"

1

DS1

crystal oscillator

12HMz

1

T1

key switch

6*6

2

S1, S2

audion

8550

1

Q1

singlechip

AT89C2051

1

V1

socket

DIP20

1

 

buzzer

5V

1

V2

terminal

KF126-2P

1

J1

circuit board

 

1

 

Schematic diagram

QIUx1lcdR6FLLypp0rhhsVeIUZoVTHkKcpt0NvsQ

You can find in "Download" section the instructions manual. Regarding to assembly, you have footprints of components on PCB.

Grade 
02/03/2020

ceas

Este super, consuma putin , cu o baterie 18650 Li-ion ceasul functioneaza aproape 48 ore. se monteaza foarte usor.

  • 1 out of 1 people found this review useful.
Grade 
05/18/2019

un produs care merita banii

simplu si eficace, programarea e putin mai complicata, trebuie descarcat manualul pentru a te descurca; atentie, chime (beep-ul din ora in ora e destul de zgomotos si ar trebui dezactivat, de fapt sunt 3 beep-uri), buzerul e un soi necunoscut pt. mine, nu are rezistenta ci doar capacitate, sa nu credeti ca e defect, era util sa se vada pe punctele afisajului ca alarmele sunt active

  • 2 out of 2 people found this review useful.

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4 bit digital electronic clock chip DIY

4 bit digital electronic clock chip DIY

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