Continue to Site

Welcome to our site!

Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Displaying numbers larger than 9

Status
Not open for further replies.

nitdgp

New Member
Dear friends,
This is my problem statement:
"I have to prepare a vehicle, which is going to follow a straight line yellow path. Now, the path has some black strips randomly arranged on it. I have to display the no of black strips after finishing path."

Now, I have used a color sensor circuit. then i am planning to use BCD counter to count no of strips and using BCD to 7 seven segment decoder to display number. But if the no is larger than 9, counter resets after 0 to 9 to 0 again. How do i display the number if has multiple digits(say 2 digits)? do i have to join 2 counters?
Any help is welcome!
 
Yes, there should be a pulse genetated by the counter when it resets, just connect the to the input of your second counter. There's probably even an example on the datasheet of the IC you're using.
 
74LS13X type chips have a carry and borrow output that can trigger a count on the next higher digit.
 
If you use TTL, which is the older technology, you put a jumper between output D from the 74LS90 (units counter) to input A from the next 7490 (decades counter).
These IC's will drive 74LS47 Ic's which drive the 7 segment displays.
With 2 cascaded together you can count up to 99.

Can't comment on the C MOS counter IC's because i have not built counters with them
 
What sort of ICs are you using?

Could you please post a schematic.?
 
Status
Not open for further replies.

Latest threads

New Articles From Microcontroller Tips

Back
Top