4017 decade counter

[Arthur]

I want to count to 16 in ttl ish logic!

 

I can count to 10 using a 4017 decade counter, can I cascade another 4017 to count to 20 or will it count the tens.

 

Does anyone have a favourite way of counting to 12+ as SIMPLY and accurately as possible.

 

Source will be a 555 timer or a press switch - single shot or chase.

 

Precision timing is unimportant say +/- 10% BUT there may be no misfires. It's for a pyro sequencer.

[GalFisk]

4514 will decode a 4 bit binary singnal to 1 of 16 outputs. You can feed it with a 4029 counter in binary mode.

Remember to debounce the manual switch.

[lja]

With two 4017s you can count to 100. Just use one to count to ten and the other to switch the grounds after every ten pulses of the first one.

[Arthur]

What I really want is to count to 20, so I want to count through the first 4017 then enable and count through the second 4017.

[lja]

Use a T type flip-flop to toggle the clock signal back and forth between the clock inputs on the 4017s. Have the last output of each 4017 trigger the flip flop to toggle (use a small diode from each 4017 output or you'll trigger output 10 on the other one).

 

The output of the flip flop can go to the enable pin of the 4017s.

[Boomer]

Are all of you over 50?

 

Use a 50-Cent microcontroller, and you can make it count to whatever you want, decode it and show it in Latin, Russian, Chinese and Greek letters on a LCD display.

 

All while it reads out the numbers aloud with a synthetic voice of course!

[lja]

I know, I know, boomers right, I use PIC microcontrollers all the time.

 

The problem is, for a beginer at least, you need the device, a programmer, a development environment and you also need to learn to program it. Never mind the transistor drivers to provide enough current for an e-match.

 

None of this is a big deal, you can build a programmer and download an IDE. You can even get free samples of a lot of controllers from the manufacturer. But if you're still learning how to sequence two johnson counters this is probably a little beyond you yet.

[Arthur]

I was looking for a simple chaser to incorporate into a pyro controller. I'm not confident that my PIC programming would be perfect nor dioI want to buy a programmer for the occasional PIC I may never use again.