please i need to make circuit using microcontroller pic

this circuit derive voltage to different 32 channels but in serial manner like shift rgesiter .
i.e the first channel is go high (1) then go low(0) , some delay and the second channel go high then go low and so on until we reach 32 then we start again from channel 1 .

would you suggest which microcontroller i will use , i think about pic 16f84 but it has 9 port only ,how can i extend this ports ?

 

Look into serial to parallel converters. Using 4 converters will give you 32 lines. The converters will share Clock, Data, and Output Enable lines, and have individual Chip Select lines.

--Rich

 

thank you but can i use microcontroller because i need the time (on and off) to be programmed

 

You would use the uC for the clock, data, and enable lines, which would allow you to vary which lines are on when, and for how long. How critical is the timing?

 

Hi Wael_73,
This is an easy circuit. You can use 2 nos. of 1:16 multiplexers(74150) and a pic micro controller.
You can very well use pic16f84/16f84A and this Pic does not have 9 ports, rather it has 2 Ports(A and B) and 13 input/outputs. Port A having 5(pin17,18,1,2,3) input/outputs and Port B is having 8 input/output(pin6,7,8,9,10,11,12,13).

 

thank you fo replay i will read (god willing) datasheet of multiplexer ,try it