Introduction: Arduino 7 Segment Clock
This instructable will show you how to make the Arduino 7 segment clock.
accuracy sucks though!
so I just made this for programming and for fun.
if you want to make a serious clock you can use rtc module which will keep a record of the time.
you can use premade 4 seven-segment display if you not comfortable with complex wiring which can significantly reduce the chance of loose connection and improper display output.
one push button is to increase the hour and another one is to increase minute by one.
4 seven-segment display
2 push button
4 one-Kohm resistor
one current limiting resistor (220ohm)
some hookup wire
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Step 1: Multiplexing 4 Seven-segment Display
connect all corresponding pin of each 7-seg to each other to multiplex the display in the given order in above images.
Step 2: Connecting 7 Segment Display to Arduino
Connect all terminals of the 7-segment display to the digital pin of Arduino according to this scheme.
A –digital pin 2
B – digital pin 3
C –digital pin 4
D –digital pin 5
E – digital pin 6
F –digital pin 7
G –digital pin 8
DP –digital pin 9.
Connect all common pin to digital pin of Arduino through 1K ohm resistor
D1 –digital pin 10
D2 –digital pin 11
D3 –digital pin 12
D4 – digital pin 13
Step 3: Connecting Seconds Led and Adjust Button
Ground one terminal of push-button and cathode of the LED.
Connect the adjacent terminal to A0 and A1 respectively.
LED anode to A3.
Step 4: Code
Download 7 segment display library first from the link given below from Github and extracrt it into Arduino ide library folder
upload code to your Arduino
you can alter the code according to yourselves.