Yusynth random gates & clock dividers

[Skrog Productions]

Hi

i have re-designed a panel i made a couple of years ago to incorporate the random gate circuit i've always wanted to build , i'm intending to up the dividers to 4 of and just have one clock input as that's the config i use most , both circuits on stripboard , hope to have it finished and running for the summer equinox with Epicyclus

here's a jpeg save from corel draw 12 that i use for the panel designs.

i may change the rotary numbers to divison markings ,

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Random gate blue.jpg
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[Skrog Productions]

All wired now & attatched to the panel , very pleased .
Dividers worked after a hair thin bit of solder found between tracks , working great now .
The random gates have a hiccup , but im on the case , i managed to source a SCL4006 chip , working on 1 & 3 not the rest, when i accidentally touched the 4006 pins the led's all flashed randomly then settled back to 1 & 3 , i've done the circuit on strip board , i'll re check everything before trying cricklewood uk for a CD4006.

still a couple of air bubbles to press out on the front .

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Random gate - quad dividers.JPG
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[yusynth]

Are you using scotchmark for your front panel ?

[Skrog Productions]

Hi Yves

i get my panels done at my local sign makers workshop , lazer printed blue onto sticky back white vinyl , using soapy water to de-activate the adhesive till it lines up with the drill holes and left to dry , the bubbles are fast contracting , almost flat finish now its had a few days to stick.

going to de-bug the random gates , i think it may be the SCL4006 chip ,


Dave..

[yusynth]

[Skrog Productions]

Latest version , going to have another look today.

Dave.

[Skrog Productions]

hurrah !!! , working now , fault caused by a rubber chip from ebay , date marked 1984 made in Tiwan , got a couple of chips from Crickelwood date marked 1979 and it's working like a dream now .
Chuffed to bits

Dave.

[ricoloverde]

Hi I cant get my Random Gates to work, Ive been over it a 100 times and cannot for the life me fig it out. My one concern is im using a HEF4006 when a cd4006 is required? think thats my issue?

EDIT: JUST SAW THAT THE HEF4006 IS A LISTED ALTERNATIVE. NOW IM REALLY STUMPED.

[yusynth]

[ricoloverde]

im using the newest board from Bridechamber

edit: thanks Yves, somehow I missed that on your page for it. I swear Im slectively blind sometimes...will try that now.

[ricoloverde]

just to be sure, are those mods for the boards Bridechamber has? Im using one of those and the HEF4006

[yusynth]

Because I am no native English speaker I am not sure that my previous message was clear.

If you have the latest PCB from Bridechamber then it is perfectly suitable for use with the HEF4006. There is no modification to apply.
The mods shown at the bottom of the module's page only concern the very first version of the PCB that was never provided by Bridechamber.

Can you describe what is not working with your module ?

[ricoloverde]

Hi Yves, thanks for the help. So far it wont really do anything. No life at all really. Im powering it off a synth.com power supply. I can see im getting power to each ic

I am getting 15v on pin 14 of the 4006, 15v on pin 16 for the 4051. Also on the 4051 i get 0v on C, 15v on B, and 0v on A

Ive gone thru every component, checked for shorts, and swapped out the ics for new ones

[yusynth]

Are you clocking it ? Have you plugged a LFO for example in the clock input ?

[ricoloverde]

yes, i took those measurements while a gate out from a MFOS Sequencer was plug into it

[ricoloverde]

Posted: Sat Feb 12, 2011 2:27 pm Post subject:
so i measured all the pins of the 4051 with a gate signal being fed in from a sequencer. gate switch set to legato. measuring from ground to each pin.

pins.
1 - 1.4
2 - 1
3 - 15
4 - 1.33
5 - 1.22
6 - 15
7 - 0
8 - 0
9 - 0
10 - 0
11 - 0
12 - 1.4
13 - 1.4
14 - 1.2
15 - 1.4
16 - 15

[yusynth]

Check with your voltmeter the voltage at pin 3 of the 4006 or pin 11 of the 4070 when clocking it at a 60BPM rate , you should measure 0V and 15V at a frequency of 1Hz , if not the problem is coming either from the 4070 or either from Q1,D1,R3,R4,R5. You can also check on the collector of Q1 (or pin 12 of the 4070).

[ricoloverde]

will try that today. question for u about the resistor networks. i couldnt find any 9 pin (1 common + 8 legs) i have 10 pin (1 common + 9 legs) can I cut the last leg off as long as it isnt the common?

thanx Yves.

[yusynth]