Free Project - 245 LED Display

[Luciano]

Hi Magu,

During our test we have complitely tested the 245 LEDs, 42 Transistors,
and all the ICs listed below and all their connections.

IC3 (complitely tested)
IC4 (complitely tested)
IC5 (complitely tested)
IC6 (complitely tested)
IC7 (complitely tested)
IC9 (complitely tested)

We have also tested these pins and connections of IC1:

RA2 (PIN1) ---- ROW1
RA3 (PIN2) ---- ROW2
RB4 (PIN10) ---- ROW3
RB3 (PIN9) ---- ROW4
RB0 (PIN6) ---- ROW5
RB2 (PIN8) ---- ROW6
RB1 (PIN7) ---- ROW7

RB5 (PIN 11) ---- CD4017 RESET


The rest of the circuit can be tesetd in five minutes with an ohmmeter.

* * *

What about the 12V power supply?

What is the current of the used 12V power supply?
Is the 12V power supply a DC power supply?
Can you post a picture of the 12V power supply?
Can you post a picture of the 5V voltage regulator circuit? (The board).

* * *

Originally Posted by magu:
have realize when do i connect the the power wire without the serial
wire, i press the program button, the led stay lit, but in 5-6 sec stops, and
then again stay lit and on the led display the fisrt led on first ROW and
seond ROW are lit. something is wrong.... but i don`t know what...

This is not possible. With the serial cable disconnected, after you have
briefly pushed the program button, the LED 1 will be lit (ON) forever.
This is because in the program, the PicBasic Pro SERIN command will wait
the character "a" forever. (Note that no timeout is used in SERIN, therefore
the program will wait forever).

This is the line of code that will make the program wait the character "a" forever:

SERIN PORTB.7, N2400, ["a"], DataBuffer

In the program, before the SERIN line, the LED 1 is lit by the following code,
where first the pin is set as output and then the pin is set to LOW.
(Note tha the RA4 sinks current so this is why "0" will lit the LED).

OUTPUT PORTA.4
ActivityLED = 0

* * *

Download the PicBasic Pro demo and write a program that makes the LED 1 blink.
Program the PIC with the HEX file, remove all the ICs from the board and
see if the LED 1 blinks. If you do that, then you will know that the 10 MHz crystal oscillator
works, that your programmer works and that the FUSE bits are correctly set.

The PicBasic Pro demo is limited to 31 lines of source code.
With 31 lines of code you can write a program that will make the LED 1 blink
and you can also write a program that will test any single LED of the board.
If you do that, make sure you use the seven 180 ohm resistors.

Here you can download the demo:
http://www.melabs.com/pbpdemo.htm

Best regards,

Luciano