Counter Circuit

[Reloadron]

Did you get tired of this thread? You are starting another thread based on the same thing.
Ron

 

[redrick17]

yeah! can you give me mate ..BCD and output will drive to the display .. my display is 3 digit seven segment display.. do you have circuits for that ??

 

[redrick17]

Did you get tired of this thread? You are starting another thread based on the same thing.
Ron

no mate .. i only ask for an IC i can use .. im still interested in the circuit you gave to me .. i just heard that there is a counter ic ..

 

[redrick17]

i'm sorry RON .. my apologize i just need to finish this in 2 week from now .. i really need help here..i want to learn and read your opinions about this .. thanks!

 

[Reloadron]

Doing what you want to do is not a problem. How you choose to go about it is up to you. Both Carl and myself have made a few suggestions. You will have to do a little research on this. OK, two weeks so I assume a school project of sorts? These are typical school assignment projects with a focus on logic and connters. How do you plan to build this? Breadboard? I would start by looking at the availability of some of the chips we have mentioned.

 

[redrick17]

in two weeks it have to be in PCB .. and by month it should be finished . i'm searching everynight mate .. i talk to my prof. and present the whole thing i learned to you guys and all of my research .. he just mentioned about the counter IC .. that i can use to simpler the circuit .. now i'm searching for those IC's that i can be used ..by tomorrow i'll be searching the availability of the chips you mentioned .. thanks mate ..

 

[redrick17]

Yes, there are many.
Do you want a BCD or binary count?
Do you want the output to drive a display?

do you have mate ?? can you give it tome .. thanks !

 

[ericgibbs]

do you have mate ?? can you give it tome .. thanks !

hi,
This link has a number of BCD Up/Down counters circuits.
https://www.electro-tech-online.com...asic-3-digit-led-decade-up-down-counter1.html

 

[redrick17]

thanks eric! D

 

[redrick17]

eric in the circuit you gave to me can i use sensor to know if it's up or down ? where should i put it ? i'm using a 3 seven segment display ..thanks!

 

[ericgibbs]

hi,
Which one of those circuits are you considering.?

 

[redrick17]

http:www.electro-tech-online.com/blogs/e...ecade-up-down-counter1-3decadeupdowncntr1.gif
this one mate ..

 

[ericgibbs]

hi,
I have combined the 3 decade counter with the manual input switches on this circuit.

When you say U/D sensor, do you mean an LED.? if not what type of sensor.?

 

[redrick17]

i'm going to use LDR or Photodiodes mate .. .

 

[ericgibbs]

i'm going to use LDR or Photodiodes mate .. .

To use LDR's or PD's for detection you require a comparator circuit, say a dual LM393, that will produce an Up or Down pulse when the light path from a light source is blocked. The comparators would replace the push switches and the inverter IC on the clock pins.

We would need to know the resistance of the LDR when illuminated and when dark.????

 

[redrick17]

reload gave me a circuit of people counter .. can you look to it the previous page of this conversation .. yah i'm going to replace push switches with sensor .. one sensor for enter and one sensor in exit ..

 

[redrick17]

mate ..what do you mean in 4K7 ?? 47K , 47 or other ?? thanks !

 

[redrick17]

what can i use in the up,down and clear button ?? is tact switch can ?? or what do you refer ?? thanks !

 

[redrick17]

and what do you mean dp ? in the seven segment display .. where do i connect that .. D thanks mate ..

 

[ericgibbs]

mate ..what do you mean in 4K7 ?? 47K , 47 or other ?? thanks !

I dont know which resistor you are asking about.??