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I used 8x8 ready made LED Matrix and The circuit was assembled on the Breadboard. My power supply current is 2A. When the circuit is connected to the power supply, all LEDs are lit simultaneously. Sometimes few LEDs or all LEDs are half dimmed.
The attached circuit diagram and hex file I received from my friend. It works well with the Proteus. But when practically created, it does not work. Anyone can guess what is the reason for it. I have only the circuit and the hex file.
Thank you for your opinion. But many PIC numbers are difficult to find in my country and some of the PICs are very expensive here. 18F4520 is also a pic number like that. So I think use of external EEPROM is a much easy way, they are not expensive as well.
This LED Scrolling messages display code is introduced by supra_56 (link below) and for it I did some changes. It worked fine with proteus.
//***********************rows **********************************
#define PIN_ST_CP PORTC.F1 // RCLK ----> Pin 12 ST_CP
#define PIN_SH_CP...
I changed the code as below
/*
'*******************************************************************************
' Configurations
' Oscillator: INTOSC:I/O
' Watchdog Timer: OFF
' Power up Timer: Disabled
' Master Clear Enable: Enabled...
I changed the code according to your reply. But now all LEDs are on simultaneously. No any effect. This is changed code
/*
'*******************************************************************************
' Configurations
' Oscillator: INTOSC:I/O
' Watchdog Timer...
Thank you for your reply.
I changed the code according to your instructions. But LEDs display very unusual pattern.
That is all LEDs lit random order without any order or delay.
Can you clarify what is the error?
Hi,
I am newbie to PIC. I want to build a PWM LED sequencer with tail effect like below.
start LED1 > small delay > start LED2 > small delay > start LED3 > ...............
I wrote this by PIC C for 16F628A.
// LED connections
sbit LED1 at RB0_bit;
sbit LED2 at RB1_bit;
sbit LED3 at RB2_bit...
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