Search found 300 matches

by tardishead
Thu May 28, 2020 3:55 am
Forum: Modular Synth General Discussion
Topic: Strings and saw waves
Replies: 60
Views: 1054

Re: Strings and saw waves

perhaps a bit of portamento to model it as fretless ... Typical portamento-glide wil be backwards or missing correct relationship. Expo = slow to start building as 'distance' is covered, ending quickly. Linear = constant change rate. Neither is what actually happens. You need S-shaped transitions. ...
by tardishead
Fri May 15, 2020 4:45 am
Forum: Music Tech DIY
Topic: LED bar displays scanner
Replies: 2
Views: 101

LED bar displays scanner

I’m looking at options for LED bar displays for a scanner I’m building. Something like Knight Rider ha! I only have 8 stages I’ve seen the usual bars standard 2.54mm spacing with vertical mounted LEDs which are a bit small but there are wider ones with horizontal LEDs. Unfortunately I can’t find 8 s...
by tardishead
Sun Apr 26, 2020 12:50 pm
Forum: Music Tech DIY
Topic: CGS514
Replies: 47
Views: 1596

Re: CGS514

I’ve been building CGS stuff for 20 years Never had any issues with Ken’s stuff mainly because of the included schematic even though a lot of people moan about CGS stuff I bought a batch of about 10 new PCBs from Elby to see that they had all changed to “better” versions and none of the schematics w...
by tardishead
Sat Mar 28, 2020 5:06 pm
Forum: Music Tech DIY
Topic: Logic Toggle Latch
Replies: 43
Views: 627

Re: Logic Toggle Latch

Since tardishead still hasn't let us know his intent for the circuit this may matter. Umm I certainly tried to about 10 posts ago! To be able to turn on a continuous logic high to reverse a sequencer or switch a Serge BI DI SWITCH for example I guess if the slowness is audible that might cause prob...
by tardishead
Sat Mar 28, 2020 3:35 pm
Forum: Music Tech DIY
Topic: Logic Toggle Latch
Replies: 43
Views: 627

Re: Logic Toggle Latch

Is this what you're after? http://tinyurl.com/u2huwmp tardishead did you see my interactive example? Graham Hinton , curious to hear your thoughts on it. Yes absolutely It looks elegantly simple! I already have 2 discrete inverters in my modular I presume I canI replicate this with them?
by tardishead
Sat Mar 28, 2020 3:04 pm
Forum: Music Tech DIY
Topic: Logic Toggle Latch
Replies: 43
Views: 627

Re: Logic Toggle Latch

Yes absolutely
It looks elegantly simple!
I already have 2 discrete inverters in my modular
I presume I canI replicate this with them?
by tardishead
Sat Mar 28, 2020 12:35 pm
Forum: Music Tech DIY
Topic: Logic Toggle Latch
Replies: 43
Views: 627

Re: Logic Toggle Latch

msboude wrote:
Sat Mar 28, 2020 11:22 am
Yep yep! I guess I should have stated that the doepfer does a gate out that will stay high..
Really that’s interesting
I bet there aren’t many dividers out there that do that
by tardishead
Sat Mar 28, 2020 11:07 am
Forum: Music Tech DIY
Topic: Logic Toggle Latch
Replies: 43
Views: 627

Re: Logic Toggle Latch

A simple clock divider like the doepfer can be used as a toggle at its /2 output. Yeh I've got a CGS pulse divider but the output divisions are all the same pulse width as the clock they're dividing. Not a continuous high voltage like I need (until next trigger). Thats why I suggested the 4017 togg...
by tardishead
Sat Mar 28, 2020 10:40 am
Forum: Music Tech DIY
Topic: Logic Toggle Latch
Replies: 43
Views: 627

Re: Logic Toggle Latch

I see where you get your name.. you address someone giving you shit... but dont address the people that are actually helping you and drawing out circuits you dick. Ummm I do apologise! I really appreciate it. I am actually trying to learn and understand the options given by everyone. I answered the...
by tardishead
Sat Mar 28, 2020 3:47 am
Forum: Music Tech DIY
Topic: Logic Toggle Latch
Replies: 43
Views: 627

Re: Logic Toggle Latch

Better questions get better answers. What are you actually trying to do Ok sorry I thought I had explained this. I want to use a trigger to toggle between 2 states, a continuous high and continuous low. Certain functions require a continuous high voltage to turn on Reverse function on a sequencer A...
by tardishead
Fri Mar 27, 2020 1:09 pm
Forum: Music Tech DIY
Topic: Logic Toggle Latch
Replies: 43
Views: 627

Re: Logic Toggle Latch

Are you trying to toggle a signal or a switchbutton? There are differences. I want to use a trigger to toggle between 2 states, a continuous high and continuous low. 4017 is another way of doing it right? Just reset on the 3rd count so it toggles between 2 positions, take the output from one positi...
by tardishead
Fri Mar 27, 2020 5:32 am
Forum: Music Tech DIY
Topic: Logic Toggle Latch
Replies: 43
Views: 627

Re: Logic Toggle Latch

I found this circuit. Forgive my ignorance - it will turn on with a trigger but will it turn off with the next trigger?
Image
by tardishead
Thu Mar 26, 2020 4:24 pm
Forum: Music Tech DIY
Topic: Logic Toggle Latch
Replies: 43
Views: 627

Re: Logic Toggle Latch

EATyourGUITAR wrote:
Thu Mar 26, 2020 3:51 pm
CD4013 with the not Q connected to data input. clock input is your button or your input. Q OUT is your output. use the Set and Reset pins if you need a reset button in a specific state.
Great thanks
So I presume I should buffer the output with a transistor?
by tardishead
Thu Mar 26, 2020 12:59 pm
Forum: Music Tech DIY
Topic: Logic Toggle Latch
Replies: 43
Views: 627

Logic Toggle Latch

I need to build a simple toggle latch
What is the easiest way?
I thought use a 4027 JK Flip flop - short J and K inputs and connect clk to V+ if I don’t need it clocked?
by tardishead
Wed Mar 25, 2020 7:24 am
Forum: Music Tech DIY
Topic: Serge CGS 116 ADSR CV & Pots
Replies: 11
Views: 303

Re: Serge CGS 116 ADSR CV & Pots

I’ve just built the new Elby version which works The pots should be voltage dividers between +12v and GND Sounds like you may have connected to -12v by mistake I did not build mine with the matched transistors Can someone tell me if that might cause any issues - possibly inconsistent timing due to t...
by tardishead
Wed Mar 25, 2020 2:30 am
Forum: Music Tech DIY
Topic: 258r V3.0 with vintage resistors in waveshaper, expo FM
Replies: 6
Views: 333

Re: 258r V3.0 with vintage resistors in waveshaper, expo FM

wow thats about the most expensive DIY I've ever seen!
by tardishead
Tue Mar 24, 2020 5:20 am
Forum: Music Tech DIY
Topic: 258r V3.0 with vintage resistors in waveshaper, expo FM
Replies: 6
Views: 333

Re: 258r V3.0 with vintage resistors in waveshaper, expo FM

Peake wrote:
Fri Mar 20, 2020 7:43 pm
It was a build for a customer, already shipped. The waveforms looked as expected on the oscilloscope!
Are you selling these PCBs ?
If not where are they from?
by tardishead
Fri Mar 20, 2020 5:33 am
Forum: Modular Synth General Discussion
Topic: Self generating patches....tips and ideas ?
Replies: 820
Views: 110091

Re: Self generating patches....tips and ideas ?

It is a fascinating patch, but really fussy to adjust. That's why I prefer to do it in a Max patcher. It should be easy to build into a module, either as a Ornament & Crime app or a discrete circuit like this one: https://arxiv.org/pdf/nlin/0603025.pdf. Then you could design in a fine control for S...
by tardishead
Mon Mar 16, 2020 11:32 am
Forum: Modular Synth General Discussion
Topic: Seeking the Perfect CV Keyboard
Replies: 70
Views: 34633

Re: Seeking the Perfect CV Keyboard

talking to me?
by tardishead
Tue Mar 03, 2020 2:42 pm
Forum: Modular Synth General Discussion
Topic: Modular Synths and Jazz?
Replies: 47
Views: 3166

Re: Modular Synths and Jazz?

shockletit wrote:
Tue Mar 03, 2020 2:07 pm
If only Sun Ra were still around...
Some of those Crumar half synth half organ things were amazing
I tried to find one for ages.
by tardishead
Tue Mar 03, 2020 1:06 pm
Forum: Modular Synth General Discussion
Topic: Modular Synths and Jazz?
Replies: 47
Views: 3166

Re: Modular Synths and Jazz?

A lot of library music in the 70s featured modular synths coupled with some of the best players you’re ever likely to hear mostly coming from a jazz background Klaus Weiss did some huge sounding modular Moog jams that make Dr Dre sound like lift music umberto umiliani Lots of soundtracks. Rollerball...
by tardishead
Sun Mar 01, 2020 2:55 pm
Forum: Music Tech DIY
Topic: Flip/flop latch circuit
Replies: 4
Views: 208

Flip/flop latch circuit

In need of a SR flip flop latch circuit.
Can anybody point me to one?
I’m surprised to search these forums and not really find much in the way of this
by tardishead
Fri Feb 21, 2020 9:03 am
Forum: 5U Format Modules
Topic: I like my knobs...
Replies: 41
Views: 1622

Re: I like my knobs...

There's always a lot of talk about the influx of "crammed" modules - and distain from the traditionalists Personally if a module is "crammed" with features and has a lot of small knobs that don't need "wiggling" very much then whats the problem? This is an enhancement. But if the knobs are small and...
by tardishead
Mon Feb 17, 2020 6:16 pm
Forum: Music Tech DIY
Topic: Trapezoid VCO
Replies: 76
Views: 5957

Re: Trapezoid VCO

the BF245B has a variation in Idss of 6 to 15 mA and a forward transfer admittance of 3.0 to 6.5 mMhos. this means those resistors can span from 150 to 330 Ohms. so its possible that the JFET is fine, but rather that the resistors are off. When trimming for best shape I seem to end up taking the "s...
by tardishead
Mon Feb 17, 2020 6:03 pm
Forum: Music Tech DIY
Topic: Trapezoid VCO
Replies: 76
Views: 5957

Re: Trapezoid VCO

I thought you still use the BF256B as mentioned in your earlier post. So if you have the right FET check the resistor values. And have a look at the diodes and trimmers. Last resort is swapping the working FET against the not working so you can deduce that the FET is bad.. Right so I bought a new b...

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