Search found 10 matches

Hi,
I am designing a ten step sequencer, mostly inspired from MFOS's Ten Step Sequencer and Moritz Kleins' design. Diffrent from those, my design is using a 556. Half of it is the clock (in astable m ...

I tried various caps and 680p was the best (this is far beyond 47p). Lowering the cap increased the ripple. The ripple is gone but as the frequency increases amplitude goes down. Not a perfect solutio ...

It is actually audible at the high end. I will check the cap. Thank you my friend.

Hi there,
Previously I built the Simple VCA and Wavefolder module from YuSynth and I am very happy with them. Recently, I built the YuSynth VCO module. Everything is OK except for one thing. I tried ...

Thanks. Actually, I realized that the schematics says it is 3300ppm. But on the website it is written as 3500ppm. Maybe a typo ... I used the 3300 and it works great. Now it is time to add the saw con ...

I was not around for a while and haven't seen your reply. Now I am back and thank you so much for the schematic. I will add this improvement.

Another question is that:
The tempco on the original s ...

Hi there,
I have 2 of Thomas Henry's VCO-1 in my modular and I am very happy with those guys. The only thing missing is a sawtooth output. Is it possible to improve this circuit by adding sawtooth ou ...

The ota you are using, 3080 or 13700?

It's a 3080, but note sure if it is fake or not. I will check. The same ones work on my VCO-1s without any problem.

I’d try swapping that after gettting t ...

I figured out that:

1- TL071 is getting very hot and frying some time later. Even if I remove the TL071 from its socket, circuit keeps working in its abnormal behaviour. 071 has no function in my c ...

Hi all,

As many of you, I stepped into the fantastic world of modular synthesizers and the first module I built was the TH's VCO-1. It works perfectly and I already built the second one.

Nex ...

Author	Message
Topic: Analog step sequencer design
Arda Eden Replies: 1 Views: 1444	Posted: Thu Apr 27, 2023 1:55 am Subject: Analog step sequencer design Subject description: How to gate first step before incrementing the counter (4017) Forum: DIY Hardware and Software » Developers' Corner
Arda Eden Replies: 1 Views: 1444	Hi, I am designing a ten step sequencer, mostly inspired from MFOS's Ten Step Sequencer and Moritz Kleins' design. Diffrent from those, my design is using a 556. Half of it is the clock (in astable m ...
Topic: VCO Strange Waveshaper Behaviour
Arda Eden Replies: 3 Views: 2649	Posted: Mon Dec 20, 2021 12:54 pm Subject: VCO Strange Waveshaper Behaviour Forum: DIY Hardware and Software » YuSynth
Arda Eden Replies: 3 Views: 2649	I tried various caps and 680p was the best (this is far beyond 47p). Lowering the cap increased the ripple. The ripple is gone but as the frequency increases amplitude goes down. Not a perfect solutio ...
Topic: VCO Strange Waveshaper Behaviour
Arda Eden Replies: 3 Views: 2649	Posted: Mon Dec 20, 2021 11:12 am Subject: VCO Strange Waveshaper Behaviour Forum: DIY Hardware and Software » YuSynth
Arda Eden Replies: 3 Views: 2649	It is actually audible at the high end. I will check the cap. Thank you my friend.
Topic: VCO Strange Waveshaper Behaviour
Arda Eden Replies: 3 Views: 2649	Posted: Sun Dec 19, 2021 7:45 am Subject: VCO Strange Waveshaper Behaviour Forum: DIY Hardware and Software » YuSynth
Arda Eden Replies: 3 Views: 2649	Hi there, Previously I built the Simple VCA and Wavefolder module from YuSynth and I am very happy with them. Recently, I built the YuSynth VCO module. Everything is OK except for one thing. I tried ...
Topic: Improving VCO-1
Arda Eden Replies: 6 Views: 6032	Posted: Fri Nov 19, 2021 11:06 am Subject: Improving VCO-1 Forum: DIY Hardware and Software » Thomas Henry designs
Arda Eden Replies: 6 Views: 6032	Thanks. Actually, I realized that the schematics says it is 3300ppm. But on the website it is written as 3500ppm. Maybe a typo ... I used the 3300 and it works great. Now it is time to add the saw con ...
Topic: Improving VCO-1
Arda Eden Replies: 6 Views: 6032	Posted: Sat Nov 13, 2021 12:01 am Subject: Improving VCO-1 Forum: DIY Hardware and Software » Thomas Henry designs
Arda Eden Replies: 6 Views: 6032	I was not around for a while and haven't seen your reply. Now I am back and thank you so much for the schematic. I will add this improvement. Another question is that: The tempco on the original s ...
Topic: Improving VCO-1
Arda Eden Replies: 6 Views: 6032	Posted: Mon Dec 14, 2020 6:40 am Subject: Improving VCO-1 Subject description: Possibility of adding sawtooth output to VCO-1 Forum: DIY Hardware and Software » Thomas Henry designs
Arda Eden Replies: 6 Views: 6032	Hi there, I have 2 of Thomas Henry's VCO-1 in my modular and I am very happy with those guys. The only thing missing is a sawtooth output. Is it possible to improve this circuit by adding sawtooth ou ...
Topic: About VCA-1
Arda Eden Replies: 4 Views: 3690	Posted: Sun Nov 15, 2020 8:05 am Subject: About VCA-1 Forum: DIY Hardware and Software » Thomas Henry designs
Arda Eden Replies: 4 Views: 3690	The ota you are using, 3080 or 13700? It's a 3080, but note sure if it is fake or not. I will check. The same ones work on my VCO-1s without any problem. I’d try swapping that after gettting t ...
Topic: About VCA-1
Arda Eden Replies: 4 Views: 3690	Posted: Sat Nov 14, 2020 1:21 pm Subject: Update Forum: DIY Hardware and Software » Thomas Henry designs
Arda Eden Replies: 4 Views: 3690	I figured out that: 1- TL071 is getting very hot and frying some time later. Even if I remove the TL071 from its socket, circuit keeps working in its abnormal behaviour. 071 has no function in my c ...
Topic: About VCA-1
Arda Eden Replies: 4 Views: 3690	Posted: Sat Nov 14, 2020 8:44 am Subject: About VCA-1 Subject description: Strange Behaviour of my built VCA-1 Forum: DIY Hardware and Software » Thomas Henry designs
Arda Eden Replies: 4 Views: 3690	Hi all, As many of you, I stepped into the fantastic world of modular synthesizers and the first module I built was the TH's VCO-1. It works perfectly and I already built the second one. Nex ...