Free Project - 245 LED Display

[T.Jackson]

That's right. I normally start off with something roughly hand drawn, sometimes nothing on paper at all - working directly off the top of my head, build a prototype then proceed to document it.

[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.