gerif
Junior Member
Posts: 53
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Post by gerif on Dec 27, 2023 10:47:22 GMT
I had an idea for a simple module with dual gang slider potentiometer for confortable operation of stereo audio espacially.
Now I have the specification (Wiki), the diagram and the PCB at the first step!
Attachments:FADER Diagram.pdf (76.94 KB)
FADER Wiki.pdf (591.04 KB)
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Post by robertlanger on Dec 29, 2023 11:34:13 GMT
Great! We cannot have enough variety of modules!
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Post by rockysmalls on Dec 30, 2023 10:47:14 GMT
I had an idea for a simple module with dual gang slider potentiometer for confortable operation of stereo audio espacially.
Now I have the specification (Wiki), the diagram and the PCB at the first step!
fabulous,, be great if the second output could be the inverse of the first... of course you can do that with a couple of the other modules but would be more convenient if , say, the very bottom output 2 pin was inverse? |
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gerif
Junior Member
Posts: 53
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Post by gerif on Dec 30, 2023 20:23:33 GMT
I understand: Inversion can be used for cross fads!
I will put an additional switch DPDT to change begin and end of the second gang of the potentiometer (down: full, up: zero)!
This will work with the linear and log characteristics!
Surely an op-amp for inverting make sense, but for my first project I don't want use SMD and so there is very less space!
I do not really know if I need the voltage followers at the inputs.
With log characteristics and full position the poti and the resistant are in parallel which means around 15k instead of 100k.
Currently I have not AE Modular to make some test!
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Post by rockysmalls on Dec 30, 2023 22:51:58 GMT
i hope an AE turns up for you very soon.
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gerif
Junior Member
Posts: 53
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Post by gerif on Jan 6, 2024 0:29:51 GMT
One additional idea for a module which fits to the fader module! Look at the attachments!
On braed board it is working!
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gerif
Junior Member
Posts: 53
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Post by gerif on Feb 27, 2024 20:58:22 GMT
Hello!
My first DIY module is reality and is working 
Or to provide manual CVs
There are different slider potentiometer and switches with different footprints on the market. Before ordering a PCB you should have the material available to check the footprints!
One open issue are the front panel and the knob for the slider! The switches has quite short levers. I hope they can be used with front panel.
Design with EasyEDA and print from JLCPCB, material from Aliexpress and Mouser! The database of EasyEDA needs some attention to get correct and useful symbols and footprints. The automatic routing is working really well and is very useful!
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gerif
Junior Member
Posts: 53
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Post by gerif on Feb 27, 2024 23:12:07 GMT
It is quite similar to 2ATT/CV but with 4 attuniators and the possibility to distribute one input to 4 outputs with different levels.
The example put output 1 to a first filters at the left channel and output 2 to a second filter at the right channel. Output 3 modulates one ocsillator. All three are from the same LFO connected to the input.
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Post by keurslagerkurt on Mar 5, 2024 15:51:09 GMT
Super cool stuff! I love faders  very smart idea with the switch for the log 'trick' to place a resistor in parallel. Simple but super effective, the best kind of ideas! |
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gerif
Junior Member
Posts: 53
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Post by gerif on Mar 5, 2024 20:50:24 GMT
The switch (OUT2 / INV) which is changing the ends of the second potentiometer channel are making the stereo fader to a cross fader/balance. With the fader in the middle position, you can cahnge the function during a session. Fad in with both channels to middle - change to position INV and move between IN1 and IN2!
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gerif
Junior Member
Posts: 53
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Post by gerif on Mar 19, 2024 22:19:44 GMT
I use my AE Modular with the SEQ8 but also with a keyboard. Thats means I have to change CV and Gate between the sequencer and the internal bus. At the starter racks the number of MULT is quite low, so there is an idea for a new DIY project: MULT.pdf (584.57 KB) |
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Post by leethargo on Mar 20, 2024 7:25:32 GMT
Oh, I like the idea of combining manual push-buttons with mults and think I will breadboard this :-)
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Post by feijai on Mar 20, 2024 11:48:40 GMT
I am looking at your diagram and I have a few suggestions.
1. You have IN1 switches on one side and IN2 on the other side. This is confusing because, if you have two inputs, I would imagine that 95% of the time they would be used for a crossfader application. Thus LOW of IN1 would be HIGH of IN2. Instead, I suggest putting IN1 switches at the TOP on both sides and IN2 switches at the BOTTOM on both sides.
2. Because crossfader is a likely application, I would urge you to have a crossfader output! OUT1, OUT2, and MIX. I understand that this is more circuitry. But it would be worth it.
3. I would also suggest using 8-pin sockets on each side even though you are not using them all. You could reserve some socket pins as MULTS. I'd just have one IN1 and one IN2, and six MULTs on the left side, and perhaps two OUT1 and 2 OUT2 and 4 MULTS on the right side.
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gerif
Junior Member
Posts: 53
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Post by gerif on Mar 20, 2024 18:58:20 GMT
I am looking at your diagram and I have a few suggestions.
1. You have IN1 switches on one side and IN2 on the other side. This is confusing because, if you have two inputs, I would imagine that 95% of the time they would be used for a crossfader application. Thus LOW of IN1 would be HIGH of IN2. Instead, I suggest putting IN1 switches at the TOP on both sides and IN2 switches at the BOTTOM on both sides.
2. Because crossfader is a likely application, I would urge you to have a crossfader output! OUT1, OUT2, and MIX. I understand that this is more circuitry. But it would be worth it.
3. I would also suggest using 8-pin sockets on each side even though you are not using them all. You could reserve some socket pins as MULTS. I'd just have one IN1 and one IN2, and six MULTs on the left side, and perhaps two OUT1 and 2 OUT2 and 4 MULTS on the right side.
Hi Feijai, thanks for your suggestions!
From the beginning the idea was to have a stereo master fader for AE Modular. Now it is a little bit more!
Ad 1: The fader module have 2 switches for the IN1/OUT1 and 3 switches for IN2/OUT2. Depending of the position of the OUT2/INV switch the function is a simple stereo fader (OUT2) or a cross fader (INV).
Ad 2: Output OUT1 always is 0% at the bottom and and 100% at top position Output OUT2 is doing the same with switch at position OUT2, but with position INV OUT2 is 100% at bottom and 0% at the top! The OUT2/INV switch is to change between stereo fader and cross fad.
There always is less space for devices; therefore the module is passive without any op amp. Therefore there is no mix output.
Ad 3: The slider potentiometer has a 60mm travel which means it would reach up between 8-pin sockets - therefore only 4-pins sockets. The advantage to have 2 pins for each I/O is you can route a coming wire to a going wire to create a bar over more modules without an extra MULT.
Since I use the module there is the idea to have an additional MUTE switch!
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very smart idea with the switch for the log 'trick' to place a resistor in parallel. Simple but super effective, the best kind of ideas!
