Digital Clock using Arduino.

DIGITAL CLOCK USING ARDUINO

Component List :-
1. Atmega328p / Atmega8A
2.16Mhz Crystal
3. 22PF x2 Capecitors
4. 28 Pin Ic Base
5. Led (I Am Using 116 LEDs)
6. Zero PCB
7. Slide On Off switch
8. Push On-Off Switch (1 Pcs)
9. Push Button Switch  (2 Pcs)
10. Resistors 100 Ohm (8 Pcs)

Additional Items
1. 3.7 Volt Li-Ion Battery
2. Li Ion Battery Charger


Step 1- Make Single Seven Segment - each line of seven segment is made with 4 LEDs connected in parallel connection, Cathode of all the LEDs are connected together and Anode of 4 LEDs of a group are connected with each other.




Step 2- Make 4 Such Seven Segments, and keep the Cathode of each seven segment saperate and connect then to a male header as shown in the fig below.


Step 3- Connect A segment of all the four Digits together and further connect them with male pin header as shown in the figure.similarly connect B segment of all the 4 Digits together as do it for all the A to G segments.

LED display board using Arduino.

LED Display Board using Arduino.


 LED Display Board using P10 LED Matrix Display and Arduino
Display advertising plays a very importing role in marketing and there are several advertisement methods like newspapers, posters, glow signboards, etc. but digital LED display boards are getting popular nowadays because of their reliability and advantages. Although they are a little bit expensive still they are durable and customizable, like the advertising text can be changed easily whenever needed and they can also be used as Digital Notice Board at any public place. We previously used an 8x8 LED matrix with many boards to control the text displayed over it, today we will use the P10 display with Arduino.
          we are going to use a 32x16 LED dot Matrix display module which is also known as P10 LED Display Module to display a scrolling text by using ArduinoUNO.
          P10 modules can be cascaded to build any size of the advertising board.
Required Components
1. Arduino UNO-1
2. 32*16 P10 LED display module-1
3. 16 Pin FRC connector-1
4. 5V DC,3 AMP SMPS
5. Connectors
     Working of a P10 LED Matrix Module

A  P10 LED Display Module is the most suitable for designing any size of outdoor or indoor LED display advertisement board. This panel has a total of 512 high brightness LEDs mounted on a plastic housing designed for best display results. Any number of such panels can be combined in any row and column structures to design an attractive LED signboard.
The 32*16 module size means that there are 32 LEDs in each row and 16 LEDs in each column. So there is a total of 512 numbers of LEDs present in each module unit.
Features of a P10 LED Matrix Module:
1. Brightness: 3500-4500nits
2. Max Power Consumption: 20W
3. Voltage Input: DC 5V
4. IP65 Waterproof
5. 1W Pixel Configuration
6. High Viewing Angle
7. High Contrast Ratio
          Pin description of P10 display module:

 Enable: This pin is used to control the brightness of the LED panel, by giving a PWM pulse to it.
 A, B: These are called multiplex select pins. They take digital input to select any multiplex rows.
 Shift clock (CLK), Store clock (SCLK) and Data: These are the normal shift register control pins. Here a shift register 74HC595 is used.

Circuit Diagram
Complete circuit diagram for P10 module with Arduino is given below:

Arduino UNO and P10 display modules are interconnected as per the pin mapping are shown below:
P10 LED Module Arduino UNO
ENABLE .......9
A..............6
B .......7
CLK .....13
SCLK...... 8
DATA..... 11
GND...... GND


Note: Connect the Power terminal of the P10 module to 5V DC SMPS separately. It is recommended to connect a 5V, 3 Amp DC power supply to a single unit of P10 LED module. If you are planning to connect more numbers of the module, then increase your SMPS rating accordingly.
P10 LED Module programming with Arduino
After the successful completion of the hardware setup, now it’s time to program Arduino. Complete code for this 10 Led Display Arduino along with the video is given at the end of this tutorial. The stepwise description of the code is given below.
First of all, include all the dependent librariesin the program. Here we are using “DMD.h”Library for P10 led operations, download this library from here and install it in Arduino IDE. After that include the library for “TimerOne.h” which will be used for interrupt tasks. This library can be downloaded

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