555 and Counter HELP

216

02:52:42

So I made the 555 clock and am trying to figure out this counter... but hardly anywhere does it say on datasheets or pinouts of most counters I've looked up..

Up, down, 1 2 4 8, load, carry, reset, borrow..... A B C D...

What does all of this mean any help would be much appreciated..

Basically explaining how the counter works and why its pinouts are labeled so odd is all I'm asking..

published 2 years ago

wyoelk

2 years ago

Maybe these can help a bit a couple 555 basic circuits, http://everycircuit.com/circuit/5997908791656448 and http://everycircuit.com/circuit/5212107531091968 And basic counter http://everycircuit.com/circuit/5871471181955072

yereon

2 years ago

I appreciate it but I was really more wondering what the pins that aren't being used are for.. it's just the labels EC has on this counter, looking on datasheets and pinouts there were some things there.. but nothing that really covered the up, down, 1 2 4 8, load, carry, reset, borrow..... A B C D... I understand the 1 2 4 8 and ABCD being inputs and outputs I guess? Thats what I was getting at

592azy2circuitdude

2 years ago

This topic was brought up before: https://everycircuit.com/circuit/5751367114948608. Basically, pins A, B, C, and D are output pins holding the binary number of the counter (A is LSB and D is MSB). The RESET input pin sets the output pins to 0000. The UP input pin increments binary number. The DOWN input pin decrements binary number. If the binary number exceeds 1111, the CARRY output pin goes high. If the binary number goes below 0000, the BORROW output pin goes high. Pins 1, 2, 4, 8, and LOAD are used to set the binary number. A high on the LOAD pin pushes the logic levels on pins 1, 2, 4, 8 to output pins A, B, C, D. Good luck!

yereon

2 years ago

Awesome! Exactly what I was looking for, thank you both.

JoDaGi

2 years ago

https://everycircuit.com/circuit/6505570240299008 shows how to use I think, hope this helps.

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