Hello guys my name is John Paul, do guys have any idea how to make a 0-99 up/down counter with a common cathode display?
also can you tell me guys where to put a schmitt trigger to prevent button bouncing?


i cant find a 0-99 counter using IC 4510 and 4511 or IC 7490 and 7447
i want it to count up and down using a button
and i cant find any simple schmitt trigger circuit

Any Help would be very Appreciated

 

Googled "0-99 bcd counter", first image shows what you need..

Well, at least counting one way..

 

Add an cmos TLC555 set to the monostable to be the debounce component, the delay time setup as 50mS, the pin 3 connect to the clock input of CD4510.

 

Oops 7448 ic is not available in the store

 

Add an cmos TLC555 set to the monostable to be the debounce component, the delay time setup as 50mS, the pin 3 connect to the clock input of CD4510.

Thanks for the reply but i am finding easier ways for a debounce circuit

 

Googled "0-99 bcd counter", first image shows what you need..

Well, at least counting one way..

How about using ic 4510 and ic 4511? (Sorry if im bugging you =) )

 

I found this link:

http://www.electronics-tutorials.ws/counter/bcd-counter-circuit.html

But i dont know or can it count up and down using a button

 

How about using ic 4510 and ic 4511?

Similar circuit. TI datasheet has examples for synchronous and ripple clocking.

 

But i dont know or can it count up and down using a button

Only counts up.

Just design your own using whatever up/down counter you buy. Not that difficult and most datasheets will have application suggestions.

 

Hello guys my name is John Paul, do guys have any idea how to make a 0-99 up/down counter with a common cathode display?
also can you tell me guys where to put a schmitt trigger to prevent button bouncing?


i cant find a 0-99 counter using IC 4510 and 4511 or IC 7490 and 7447
i want it to count up and down using a button
and i cant find any simple schmitt trigger circuit

Any Help would be very Appreciated

Something like this? I haven't built it yet but it should work.

 

Something like this? I haven't built it yet but it should work.

Exactly! i will just wait for you to test it

 

Only counts up.

Just design your own using whatever up/down counter you buy. Not that difficult and most datasheets will have application suggestions.

Ok, Thanks

 

Something like this? I haven't built it yet but it should work.

Wait a minute. Did your circuit say to use the 4510 IC to be schmitt trigger?
If 4510 ic is the schmitt trigger then how do i connect it?
Show the pic of ur design on breadboard


I forgot to say im a 10 yr old kid lol

 

Wait a minute. Did your circuit say to use the 4510 IC to be schmitt trigger?
If 4510 ic is the schmitt trigger then how do i connect it?
Show the pic of ur design on breadboard


I forgot to say im a 10 yr old kid lol

UPDATE: it was a cd40106 ic (my eyes betrayed me) when i looked at its datasheet it was made out of schmitt symbols (schmitt trigger?) but i found another ic called 74hc14....so maybe i can subsitute the CD40106 with a 74HC14?
Even if one of them is an inverted schmitt trigger

 

How wonderful a 10 years old kid joined the forum, really welcome...
And you preferred the 14 pins ic then a 8 pin cmos TLC555, you like big size?

 

I forgot to say im a 10 yr old kid lol

Didn't realize you were only 10; not many children can read schematics and datasheets

Here's a schematic using CD4510 and CD4511. I just drew it and haven't tested, but it should work.

Post here if you have issues or questions.

 

so maybe i can subsitute the CD40106 with a 74HC14? Even if one of them is an inverted schmitt trigger

They're both schmitt inverters and logically equivalent, but CD parts can operate from 3-15V while 74HC operate from 2-6V.

There are many different 74 series hex schmitt inverters: 7414, 74LS14, 74HC14, 74HCT14, 74AC14, 74ACT, ... They differ in supply voltage, speed, fanout, input/out characteristics.

 

How wonderful a 10 years old kid joined the forum, really welcome...
And you preferred the 14 pins ic then a 8 pin cmos TLC555, you like big size?

Tlc555 is not available in the store so i chose the other one
EDIT: Im gonna use the NE555 timer instead of the tlc555 is that ok?

 

They're both schmitt inverters and logically equivalent, but CD parts can operate from 3-15V while 74HC operate from 2-6V.

There are many different 74 series hex schmitt inverters: 7414, 74LS14, 74HC14, 74HCT14, 74AC14, 74ACT, ... They differ in supply voltage, speed, fanout, input/out characteristics.

Oh ok then i will choose cd40106 tnx

 

Guys if i use a ne555 timer how do i make it count at the normal speed and only up to 24? (Like a shot clock)