toy sequencer

[stuff_and_that]

hey, Ive only been playing with electronics for a few months and I wanted to
create a really simple seqence of beeps that are controllable. I have abunch of
555's ( ho ho ) So i decided to try and actually lay one out based on little tutorials ive done before.
I know i should try it myself on a breadboard ( which i am about to do )
but i was wondering if anyone could spot any mistakes or give me pointers
 on how to improve the circuit or maybee upgrade it.

is there better/different alternatives to the 4016 4017? these are the only ones ive tred before
is there and IC that combines 2x4016? these IC;s
are quite flexable in power supply arnt they?
will just simple wiring them up together like this be ok?
and also I only have a cheap dc adapter ( 9v 800ma max )would it work or is it dangerous?

Im not really aiming for anything amazing or musically accurate ( although it would be nice if it points somewhere in that direction )

http://img213.imageshack.us/img213/8639/beeper9zk.gif

[polyconnect]

I was about to build something like that month ago when i started with electronic. It is a very good project as it covers logical operation and sound generation.

I didn't took time to build it as my electronic skill's where going on and it didn't make sens to build something as simple. Now I regret it as I look at my first transistor organ (4 note synth) with great joy.

anyway, if you want something more usable try to combine a 4029 and a 4067 for your sequencer. You'll be able to upgrade it later to deal with muche greater stuff.

I'll post a pic with a schematic soon, it is in french right now so it need translation...[/img]

[dnny]

is there better/different alternatives to the 4016 4017? these are the only ones ive tred before
is there and IC that combines 2x4016? these IC;s
are quite flexable in power supply arnt they?
will just simple wiring them up together like this be ok?
and also I only have a cheap dc adapter ( 9v 800ma max )would it work or is it dangerous?

i don´t know what you mean whit "better" but there are other counters
from CMOS 4000-series like :
4020 -  14-stage binary ripple counter
4024 - 7-stage binary counter
4029 - 4-stage synchronous binary/decade up/down counter
4040 - 12-stage binary counter
and there is 4066 that equals whit 4016

and many others - google for cmos 4000-series

i have run those whit 9V battery, but i think there should be no problem using adapter.

i have made a similar sequencer but  instead of holding oscillators in it self, it is for CV-applications and is has also Gate option
CV-sequencer NOTE - that sequencer does not have working gate - (all the diodes and the base of transistor sould not hit ground) here you will find up to date shematics READ ALL the posts this link goes directly to page 2.


i think that on your 555 circuit the potentiometer is too heavy - if you don´t want to wait for minutes for the steps to count - i have use one of 100K and for the capacitor one of 100uF/16V

it should be nice to hear some samples of the your 4 osc sequencer - when you got it ready..

if someone knows some "easy"way to cascade two or more 4017s in chain - that would be great.

daniel

---
don´t lick frozen metals
     "trad. Finnish wisdom"

[stuff_and_that]

yeh ive read some idea on how to cascade 4017's and it looks hard , i loooked at the 4029 and a 4067 how does a multiplexer work? there wasnt much info about. i think i need to start to actually read my didital electronics book rather than looking at pictures

yeh i didnt mean better i meant, alternative ic's ill have a look into them, some of the counters loook cool you can reverse them and stuff.

im using 1uf capacitors so i fond it a little fast

[expanoncolin]

That's a really cool circuit, dnny...  have you experimented with making it "glide" a bit via a capacitor or integrator or anything?

-Colin

[dnny]

That's a really cool circuit, dnny...  have you experimented with making it "glide" a bit via a capacitor or integrator or anything?

-Colin

no i have´t yet but i sure will - thanks for the tip

 right now im trying to maka a deasent PCB for this thing


daniel

---
don´t lick frozen metals
"trad. Finnish wisdom"

[polyconnect]

the 4029 4067 combinaison looks like this. Components on the 4067's outputs are just there as examples... but you can connect them to 16 different capacitor value of your 555 tone generator, and it makes a cooool 16 step monophonic sequenced little synth.

Note the 555 on the left, used just as a clock generator

[expanoncolin]

the 4029 4067 combinaison looks like this. Components on the 4067's outputs are just there as examples... but you can connect them to 16 different capacitor value of your 555 tone generator, and it makes a cooool 16 step monophonic sequenced little synth.

Entreé sortie?

Seize sorties?

What do those mean?

Note everyone that you can use a 7555 (CMOS 555) in place of a 555 for more stable operation.

-Colin

[polyconnect]

well, the PIN1 (entrée sortie) is used when you use the 4067 as a multiplexer/demultiplexer. It can be used as a "1 input / 16 output" or a "1 output / 16 input" device...

In this case when you send a LOW signal (0) to pin 1, all outputs of 4067 will be high BUT the one actually sequenced. (which is not interesting for us as an audio sequencer)


Seize sortie means you have 16 outputs... (quite easy)

[stuff_and_that]

hi ive been looking at other sequencer diagrams a bit like dnnys and they put the LED in parralel to negative rather than putting it in series, why is this ? is it to do with the amount of power they use?

[dnny]

this is just showing of i know. but i had the chance to use my friends photographic studio so here is a photo of my Sequencer prototype.


the leds running in the bottom row indicates the steps.
the last led on bottom row is the clock rate led and above it it the clock rate pot.
the leds on upper row are gate on indicators and the switches are for gate on/off.
reset on step switches are inside the box.
manual step fw button inside the box.
the box is old wrist watch box
sound source is toy sound chip that makes sound of breaking glass


sound samples are soon to come

thanks. Janne W. for the photo

dnny

[expanoncolin]

Cool box and all... can't wait for clips...

Stuff_and_that: In parallel to negative?  What are you referring to?

-Colin

[dnny]

Cool box and all... can't wait for clips...

here are some clips :
first attempt

second attempt

here is also a link to topic on elecro-music.com about it

[expanoncolin]

Can you change the tempo on the fly?

-Colin

[stuff_and_that]

you can, just by changeing the speed of the clock with the pot