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DIY clock divider
MUFF WIGGLER Forum Index -> Music Tech DIY Goto page 1, 2  Next [all]
Author DIY clock divider
techstar
I want to build a clock divider and was wondering what the best IC would be for this project? Am I correct in thinking the 4040 counter would work well?

Also does anyone have any schematics for a good clock divider?

Thanks for your help guys thumbs up
Jarno
Fonik has a schematic of simple clockdivider on his website, I built on a piece of perf, works like a charm.
techstar
Awesome, thanks Jarno, I will check it out.
astroschnautzer
check out also 4ms rotating clock divider,$22 pcb + chip : http://www.4mspedals.com/kits.php#clocker
russma
Yusynth has a DIY divider. CGS too.
elmegil
I recently built a couple stages of the Yusynth divider, and it works well. It uses the 4017. I need to go back and check that putitng in the 5V limiting zeners was the right thing to do though....
nikmis
I am pretty happy with the cgs36 pulse divider.
http://www.cgs.synth.net/modules/cgs36_pulse_divider.html
jonbstevens
I have CGS36 as well, v1.3. It's always worked great and was easy to build. CGS project documentation makes it a joy.
rowman
4017, wire a rotary switch to all the outputs and the common switch terminal to the reset. square wave goes into the clock input pin, output comes from output pin 1 (pin 3 on the chip).

Comparator on the input, buffer on the output, and that's pretty much it!

The 4040 will give you HUGE divisions if that's what you want, like /2048.
fonik
the main difference between 4017 and 4024/4040 is that with a 4017 you could achieve odd divisions.
so you will have to think about what you want/need.
sneak-thief
John Blacet once posted this schematic for a slightly earlier version of his Frequency Divider:



It's pretty close to this, only without the level and mix:

hexinverter
One thing to keep in mind is that if you can do weird divisions (ie: /96) you can take raw DINSync/24ppqn MIDI clock and convert it to useful musical divisions for clocking analogue sequencers with.
raveboyy
Hi guys,

I would like to build myself simple clock divider.

1 input and several divided outputs...only jacks, no switches etc.

Any suggestions for a simple circuit?

I know the 4MS, Yusynth, CGS, Doepfer (not DIY)...but is there anything even simpler??

Thanks
Jarno
I built the divider fonik has on his website:
http://www.modular.fonik.de/Page49.html

Works like a charm!
raveboyy
Jarno wrote:
I built the divider fonik has on his website:
http://www.modular.fonik.de/Page49.html

Works like a charm!


This looks exactly like one i was looking for. Must check it deeper.

Thanks Jarno thumbs up
raveboyy
OK, this one doesn`t look too complicated.

Do you know if it runs at +-12V eurorack standard with no modifications?
...as the schematic is done for +-15V

Thanks
sneak-thief
I see no reason why that schematic wouldn't work with +/-12V.

4001, 4013, 4050 and 4040 all run on up to 15V. The schematic is missing the voltage inputs for the 4013 and 4001 - so just use the PDF datasheets to find out which pins are power and ground.
airfrankenstein
I'd like to adapt the yusynth divider to eurorack. where should I cut the pcb
to make it multi-tiered?

http://yusynth.net/Modular/Commun/DIVIDER/ClockDivider-LAYOUT.jpg
horstronic
airfrankenstein wrote:
I'd like to adapt the yusynth divider to eurorack. where should I cut the pcb
to make it multi-tiered?

http://yusynth.net/Modular/Commun/DIVIDER/ClockDivider-LAYOUT.jpg


I don't think that's a good idea. You can't just do a straight cut and you will have to rewire a lot of traces after that.
I would rather build it on stripboard or make a new design. Stripboard shouldn't be too hard as it is pretty much just 3x the same circuit plus a bit of filtering and the reset circuit. I would build one divider first, check if it works and then just do it the same way for the other two ones.
raveboyy
Jarno wrote:
I built the divider fonik has on his website:
http://www.modular.fonik.de/Page49.html

Works like a charm!


Guys please what transistors did you use?
The schematic says BC850..I found these in a shop only as SMD.
Is there any equivalent I can use for this divider in TO92 package?

Thanks a lot
sicpaul
raveboyy wrote:
Jarno wrote:
I built the divider fonik has on his website:
http://www.modular.fonik.de/Page49.html

Works like a charm!


Guys please what transistors did you use?
The schematic says BC850..I found these in a shop only as SMD.
Is there any equivalent I can use for this divider in TO92 package?

Thanks a lot

When I started DIY again, i also struggled over this lovely circuit and asked Fonik for a substitute of BC850. He was so kind to advise me using BC547. 2N3904 with reversed pinout to BC547 can also be used. So 3 years ago i started having an excellent working divider. 1000 Thanks to Fonik!
raveboyy
Quote:
When I started DIY again, i also struggled over this lovely circuit and asked Fonik for a substitute of BC850. He was so kind to advise me using BC547. 2N3904 with reversed pinout to BC547 can also be used. So 3 years ago i started having an excellent working divider. 1000 Thanks to Fonik!


Excellent! Thanks Sicpaul & Fonik smile

I have one more question about the reset button...

Is it allways connected to +15/+12V? The `reset` happens if the button is pressed and the connection breaks up (no current goes through the button)? Seems a little bit odd to me...

Thank you a hundredmiliontimes
elmegil
I would breadboard it with 2N3904's and see if it works. I don't see any obvious reason that it wouldn't.
raveboyy
Could please somebody advise??

On this schematic http://www.modular.fonik.de/pdf/SimpleDividerSCH.pdf

the reset happens when the connection from +15V is broke up by pressing the button?? So I need a ´Push-to-break´ type button??

Thank you
roglok
raveboyy wrote:
Could please somebody advise??

On this schematic http://www.modular.fonik.de/pdf/SimpleDividerSCH.pdf

the reset happens when the connection from +15V is broke up by pressing the button?? So I need a ´Push-to-break´ type button??

Thank you


no, the button is a "normally open" or "push to close" type.
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