How to use 16f877A instead of 18F452 in LedMatrix

[supra_56]

you have common cathode? so that means your row is cathode?

you can download my project here..

https://www.edaboard.com/threads/199151/

im using 74hc154 in my rows.. and i dont know what transistors to use to sink up my rows current.. i have 7x40 led matrix which is 7 cathode rows and 40 anode columns.. in my columns, i am using 74hc595 and what resistor or transistor should i add up to sink my columns? need help on a real hardware design.. because i want to implement this with less errors.. thanks!

No! My rows is anode and columns for cathode. Because i'm using bi-colour common cathode only. Or if I used 8x8(w/out bi-colour), I would prefer common cathode all times.

The transistor can be used any transistors such as NPN2N2222 or 2N3904 or general transistor.

For resistor, every dot matrix will come with 20mA limited for red led only. U will have known that dot matrix and also voltage is 5V. To calculated ohms law voltage/mA= +/-resistor with 1/4 or 1/8 watts. I used 220 ohms with 1/4watts. It is up to u, so u can use range 180-330 ohms.

Btw, I'm using mikroBasic pro.

 

[cuber18]

No! My rows is anode and columns for cathode. Because i'm using bi-colour common cathode only. Or if I used 8x8(w/out bi-colour), I would prefer common cathode all times.

The transistor can be used any transistors such as NPN2N2222 or 2N3904 or general transistor.

For resistor, every dot matrix will come with 20mA limited for red led only. U will have known that dot matrix and also voltage is 5V. To calculated ohms law voltage/mA= +/-resistor with 1/4 or 1/8 watts. I used 220 ohms with 1/4watts. It is up to u, so u can use range 180-330 ohms.

Btw, I'm using mikroBasic pro.

so for example if your'e using 74hc154 in your rows and 74hc595 in your columns, so that mean your columns should be in anode and your rows will be cathode?

 

[supra_56]

so for example if your'e using 74hc154 in your rows and 74hc595 in your columns, so that mean your columns should be in anode and your rows will be cathode?

Absoultely! I still have 74HC154 on seperate board

 

[cuber18]

Absoultely! I still have 74HC154 on seperate board

me also.. heheh.. uve seen my simulatioN?

 

[Abdul Razak]

Can somebody help me i keep getting this errors,even when i try to use 74Hc595 for a different project.Please i need the solution ergently.

 

[supra_56]

View attachment 64400
Can somebody help me i keep getting this errors,even when i try to use 74Hc595 for a different project.Please i need the solution ergently.

What language do u used?

 

[Abdul Razak]

am using PICC for compiling

 

[adelair]

Re: pic16F887

@supra
do you have a schematic diagram in proteus for this code?

 

[adelair]

Re: 16f877a dot ledmatrix 8x8

@supra
i try your code and the scem but it doesnt work

 

[jaga jeevan]

Re: 18f452 external oscillator

hai,

can u inform me the power supply part all matrix led's. and i need to display the big character how can i do. kindly give some idea's.

 

[jaga jeevan]

hi,

i want to display double row of 8x8 matrix. how can i do?. kindly reply.

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hi,

i want to display double row of 8x8 matrix. how can i do?. kindly reply.

 

[md mostofa kamal]

Re: 16f877 use

helpe me ?

 

[jean12]

Re: pic16F887

can you please post the circuit of your project,it can be helpful to many peoples.

Thanks

 

[hasan_kme85]

thanks try to do it

 

[kabeer02]

very nice project