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Lab-Elec
Joined: Apr 03, 2020
Posts: 5
Location: Belgium
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 Posted: Fri Apr 03, 2020 12:39 pm Post subject:
Lab-Synth |
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Hello!
I'm new in the field of DIY Synth with a background in physics, electronics and mechanics.
I would like to share my recent (quarantine was an opportunity to start this original project for me) developments to obtain advices, criticisms... This forum was a source of inspiration. Therefore, you have certainly a lot of feedback to help me.
 [/url]
https://youtu.be/QOc9lXzoiaw
You will find a some pages under construction to present the project in this website: http://lab-elec.com/LabSynth/ |
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htor
Joined: Mar 25, 2020
Posts: 2
Location: Leipzig
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| Posted: Fri May 01, 2020 2:20 am Post subject:
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cool! impressive project and documentation.
did you design all circuits from scratch yourself?
i see you have a similar power rail input configuration in your circuits. i'm wondering, do you use the diodes (D7 + D6) to protect the circuit in case you mix up GND, V-, V+ inputs leads? i assume you don't use a pin socket for supply?
and why do you have decoupling C2 + C3 in addition to C5 and C6? do they serve different purposes?
looking forward to see more LS modules!
cheers
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144 Time(s) |
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Lab-Elec
Joined: Apr 03, 2020
Posts: 5
Location: Belgium
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| Posted: Sat May 16, 2020 2:32 am Post subject:
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| htor wrote: | cool! impressive project and documentation.
did you design all circuits from scratch yourself? |
Thanks htor. Yes these are personal design but of course taking inspiration from many other projects.
| htor wrote: | | i see you have a similar power rail input configuration in your circuits. i'm wondering, do you use the diodes (D7 + D6) to protect the circuit in case you mix up GND, V-, V+ inputs leads? i assume you don't use a pin socket for supply? |
Yes the diode are to protect the circuit and also the supply in case of cabling error. In this configuration of the diode, we need resistances (R26,R27) to limit the current. These resistances are also playing the role of filter associated with capacitors C5 to C8. An other configuration could be the diodes in series but we will have a drop of 0.7V (less with scottky diodes).
I'm updating the PCBs to have the Eurorack supply socket and also to 3.5mm jacks instead of 6.35mm.
| htor wrote: | | and why do you have decoupling C2 + C3 in addition to C5 and C6? do they serve different purposes? |
It is a good practice to add systematically decoupling capacitors close to each IC.
| htor wrote: | | looking forward to see more LS modules! cheers |
I'm working now on LFO, Noise generator and improved sequencer. I will try to keep you informed.
In addition to my website, information are posted on https://www.muffwiggler.com/forum/topic-229013.html
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Lab-Synth website |
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Lab-Elec
Joined: Apr 03, 2020
Posts: 5
Location: Belgium
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