Free Project - 245 LED Display

[Luciano]

Hi Magu,

For now use the seven 180 ohm resistors while testing.
You will replace these resistors with the original 18 ohm
resistors when the system works.

While testing with the 180 ohm resistors:

Once the LEDs are driven by the PIC it might be that, in order
to see the LEDs, you will have to reduce the light in the room
where you are testing. This will not be necessary once you replace
the 180 ohm resistors with the original 18 ohm resistors.

* * *

Modify your PCB, connect the pin 15 of IC3 to the
pin 10 of IC7 via the 100k series resistor which is already
present on the schematic.

Place a 100nF capacitor close to each IC present on the circuit.
This capacitor is connected to the pins VDD and GND of the IC.
This capacitor must be close to the ICs. (Max. 10mm).

Program the microcontroller with the HEX file posted by Trent in
the first post of this thread.

Plug all the ICs in their sockets. Follow the instructions posted
by Trent. Power on the board and the circuit should work.


Best regards,

Luciano

[magu]

Hi Magu,

For now use the seven 180 ohm resistors while testing.
You will replace these resistors with the original 18 ohm
resistors when the system works.

While testing with the 180 ohm resistors:

Once the LEDs are driven by the PIC it might be that, in order
to see the LEDs, you will have to reduce the light in the room
where you are testing. This will not be necessary once you replace
the 180 ohm resistors with the original 18 ohm resistors.

* * *

Modify your PCB, connect the pin 15 of IC3 to the
pin 10 of IC7 via the 100k series resistor which is already
present on the schematic.

Place a 100nF capacitor close to each IC present on the circuit.
This capacitor is connected to the pins VDD and GND of the IC.
This capacitor must be close to the ICs. (Max. 10mm).

Program the microcontroller with the HEX file posted by Trent in
the first post of this thread.

Plug all the ICs in their sockets. Follow the instructions posted
by Trent. Power on the board and the circuit should work.


Best regards,

Luciano

it dosen`t work. i program the pic with ICPROG (plug the programer in serial port, open hex file, -> PRogram all)
. these is a picture of the board with all the components included the caps. http://www.zamfirelu.org/led/board.jpg

[Luciano]

Hi Magu,

Remove the jumper "program". Do not use a jumper, use a push button.

Best regards,

Luciano

[magu]

Hi Magu,

Remove the jumper "program". Do not use a jumper, use a push button.

Best regards,

Luciano

i remove the jumper i i use a push button but doesen`t work. when i push the button the led light but doesen`t remain lighting.

[T.Jackson]

What config fuses do you have set?

[magu]

What config fuses do you have set?

OSCILATOR : XT , FUses: wdt, pwrt, mclr, boden.

[Luciano]

Hi Magu,

Disconnect the serial cable from the board.

The RX LED1 must stay ON after you release the push button "Program".
If the LED1 does not stay ON after you release the push button "Program",
then the program is not running in the PIC.

Note that when the serial cable is connected to the board, and you press
the "Program" push button, the LED will stay ON until the first 4 bytes are
received. (Until you press the button "Program Message To The Display EEPROM"
in the VB Application). After that the first 4 bytes are received, the LED is
toggled and will be toggled again after the next 4 bytes are received continuing
in the same way until the last byte of the message is received. So the LED is
blinking while receiving the data from the PC.

Again, with the serial cable disconnected, the RX LED1 must stay ON after you
release the push button "Program". If not, then the program is not running in the PIC.

Trent, can you please confirm my last sentence?

Best regards,

Luciano