8051 problem-lamps are controlled based on the output

[adamarul]

8051 regs

hi all,
I am involved in a project with 8051 where the lamps are controlled based on the output.i.e., if the output is 0x01, one lamp should glow...similarly if the output is 0xff,all 256 lamps should glow.
give me some ideas for the implementation.

 

[sau_sol]

Re: 8051-reg

look for 8 to 256 bit decoder
or use two 4 to 128 decoder

 

[CMOS]

Re: 8051-reg

look for 8 to 256 bit decoder
or use two 4 to 128 decoder

You mean two 7 to 128 decoders []

 

[sau_sol]

Re: 8051-reg

Sorry

 

[mfarooq1]

8051-reg

Hi,
Its so simple. Use serial to parallel shift registers. Build our own logic for values and connect the registers in series as many as you need.
I have used (256) lamps.