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DIY Effects


JackLondon

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3 hours ago, disssa said:

zerofive audio LowRider clone

I did wonder with the EQP sticker if it was Pultec related and the lowrider is

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stompbox version of a legendary studio EQ, the Pultec EQP-1A,

Nice. Does it do the trick?

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On 15/03/2024 at 19:11, disssa said:

From big to small:

Equinox_vergleich.jpg.5aba4df014557613d2a90ca85de6dac8.jpg

I was thinking of building one of these pultec pedals to go in front of a Noble preamp build...

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Peavey Standard 260 Series Preamp:

standard260.jpg.0d0e6568142d2c9d5c393a5f2b9fe3e9.jpg

 

standard260_open.jpg.9eefe28d4774464879061a2af3b19c1c.jpg

 

2-Channel Preamp: Channel 1 "Effects" and Channel 2 "Normal". A rotary switch can be used to choose channel 1 or 2, or channel 1 and 2 parallel or in series

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Don't know if anyone has the the Fuzzdog Logical thread that I did  recently. Someone is building it me. Anyway, in it I said I'm gonna do the bazz fuzz as my first build.

 

 

I'm going to order it today. Does anyone have any experience of spray painting the enclosure?

 

Is it just the same as spraying a guitar but using auto paint instead? 

 

It's more the prep I need to know.

 

Do you sand enclosure to 320 grit?

 

Do you sand between coats?

 

Do you polish the clear coat at the end?

 

Cheers

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People do it lots of different ways, my general method -

 

Drill first

Sand with 400 grit

Coat of primer, dry

Coat of paint, dry

2nd coat, dry

Apply label graphics

Coat of clear coat, dry

2nd coat of clear coat, dry

Sometimes 3rd coat of clear coat

 

The clear coat I use is good but it takes a.while to dry properly, in summer I stick them outside under a pyrex bowl to get the benefit of UV - I've toyed with getting a UV lamp.

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4 minutes ago, bobbass4k said:

People do it lots of different ways, my general method -

 

Drill first

Sand with 400 grit

Coat of primer, dry

Coat of paint, dry

2nd coat, dry

Apply label graphics

Coat of clear coat, dry

2nd coat of clear coat, dry

Sometimes 3rd coat of clear coat

 

The clear coat I use is good but it takes a.while to dry properly, in summer I stick them outside under a pyrex bowl to get the benefit of UV - I've toyed with getting a UV lamp.

Cheers,

 

So no sanding between coats and you don't have to polish the clearcoat.

 

Thanks a lot 

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  • 3 weeks later...
1 hour ago, lidl e said:

I took the plunge with my first kit.

 

Let's see if i can figure this out. 

 

It's a HPF/LPF clone kit from das musikding

 

IMG-20240416-WA0000.thumb.jpeg.861b62360a7101014c6bff6438727028.jpeg

 

 

 

Ooooh nice, I’ll be watching with interest as I was looking at the vong filterung a few weeks ago. Is that the same kit or a different one?

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12 minutes ago, Bassybert said:

Ooooh nice, I’ll be watching with interest as I was looking at the vong filterung a few weeks ago. Is that the same kit or a different one?

that's the PedalPCB version of a Broughton High Pass/Low pass

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2 hours ago, lidl e said:

I took the plunge with my first kit.

 

Let's see if i can figure this out. 

 

It's a HPF/LPF clone kit from das musikding

 

IMG-20240416-WA0000.thumb.jpeg.861b62360a7101014c6bff6438727028.jpeg

 

 

 

 

I made one of those recently. All came together quite easily, although I had some sort of brain fade when doing the drilling and put the hole for the LED on a direct line between the two upper pots, so had to stick a screw in that hole and drill a higher one. Must get round to putting some labels on it.

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1 hour ago, Bassybert said:

Ooooh nice, I’ll be watching with interest as I was looking at the vong filterung a few weeks ago. Is that the same kit or a different one?

See below.

 

Hopefully there will be something to follow along. I'll either really get into it or it will be sitting in it's box for months waiting!

1 hour ago, LukeFRC said:

that's the PedalPCB version of a Broughton High Pass/Low pass

Recommended to me by your fine self! 

20 minutes ago, tauzero said:

 

I made one of those recently. All came together quite easily, although I had some sort of brain fade when doing the drilling and put the hole for the LED on a direct line between the two upper pots, so had to stick a screw in that hole and drill a higher one. Must get round to putting some labels on it.

I ordered a predrilled enclosure!

 

Made it easy on myself first time...

 

Is a kit considered DIY? I suppose it is.

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2 minutes ago, lidl e said:

I ordered a predrilled enclosure!

 

Made it easy on myself first time...

 

Is a kit considered DIY? I suppose it is.

 

Well, you're going from a completely disassembled state to a completely assembled one, and doing it yourself, so yes. The next step is to be @disssa, deconstruct an existing design, design your own PCB, and build that. Next stage from that is to get a copy of Horowitz and Hill and any relevant IC design documents and design your own effect from the ground up. I suspect that even the most dedicated purist would stop short of manufacturing their own components, so that's about as DIY as you could get.

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3 hours ago, tauzero said:

 

Well, you're going from a completely disassembled state to a completely assembled one, and doing it yourself, so yes. The next step is to be @disssa, deconstruct an existing design, design your own PCB, and build that. Next stage from that is to get a copy of Horowitz and Hill and any relevant IC design documents and design your own effect from the ground up. I suspect that even the most dedicated purist would stop short of manufacturing their own components, so that's about as DIY as you could get.

 

I don't know how the rest of you feel, but i think anyone who doesn't have a small semiconductor fab in their shed and a resistor winding station in their bathroom is just a poser.

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4 hours ago, tauzero said:

 

Well, you're going from a completely disassembled state to a completely assembled one, and doing it yourself, so yes. The next step is to be @disssa, deconstruct an existing design, design your own PCB, and build that. Next stage from that is to get a copy of Horowitz and Hill and any relevant IC design documents and design your own effect from the ground up. I suspect that even the most dedicated purist would stop short of manufacturing their own components, so that's about as DIY as you could get.


I’m going one step further. Currently investing in my future pedal endeavours by planting trees for carbon, mining ore for metal and have a couple of silicon and germanium saplings ready for planting out - It’s the only way you’ll get the authentic tone 🤪

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ok. I think i can do this...

 

i hope you fellas can bear with me with some very basic questions!

 

First off, i dont need this schematic to build this, right? I've got the bits and a BOM that corresponds to the PCB layout.  Ive got that figured out. 

 

But i dont really need to know what this is showing me ( i can get the gist from the parts list)

 

Screenshot_20240416_192213_AdobeAcrobat.thumb.jpg.5a5e79e92bbd1890ccf8f5cd7d0c2968.jpg

 

Second basic question. On the input and output jacks, which lug gets the red and which lig gets the black?

 

Screenshot_20240416_192101_AdobeAcrobat.thumb.jpg.a9e94f5b840a2dc7399b5808f9a2f81f.jpg

 

I assume the one on the left is the red wire and the one in the right is black?

20240416_192839.thumb.jpg.03e404529860ca535dbdecdb6e4cdf90.jpg

 

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Click through the build for the Vong - it’s the same principles 

start with small things and work your way up 

https://schalltechnik04.de/en/instructions/vong-filterung/5

 

go slowly, check orientation of things that have polarity. It is worth following which part is where on the schematic just because then you know where things are. 
go slowly, make sure each solder is good.

 

when soldering the footswitch do each joint and then let it cool before doing the next 

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Also, there should be a layout with the kit that gives you the location of each component and it’s orientation if it’s polarised. 
 

Judging by the questions you’re asking I’d definitely have a read of Fuzzdog’s pedal building guide before you start. Some of it only applies to the kits they sell but there’s loads of good info on the basics that will help you a lot. 
 

Your can find it at…

 

http://pedalparts.co.uk/docs/GeneralBuildGuide.pdf

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42 minutes ago, Bassybert said:

Also, there should be a layout with the kit that gives you the location of each component and it’s orientation if it’s polarised. 

PedalPCB do really good PCB layouts, and then fairly minimal parts list and Schematic... https://docs.pedalpcb.com/project/FrequencyInterchange-PedalPCB.pdf 
The PCB has the values on it I think? 

 

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Simple Zoom up/down patch switcher.

 

I wanted a simple way of going up and down through patches on an MS-60B - this would also allow one effect in each patch to be switchable.

 

This uses the Arduino Pro Mini (3.3V version) and a USB host shield, which keeps it all in a compact format. It does require a minor modification to the host shield as the Zoom pedal will take power from the USB connection, which needs to be at 5V. This is the USB host shield I used: https://www.ebay.co.uk/itm/192928198858 and an example of the Pro Mini is https://www.ebay.co.uk/itm/305210446733. This also needs a programmer, for example https://www.ebay.co.uk/itm/235444132988, as the Pro Mini doesn't have a USB port.

 

The host shield is modified by cutting the trace running to the USB 5V pad (note: there may not be a 2k2 resistor where shown) and then connecting Vraw on the Arduino Pro Mini to Vbus on the USB connector (the red blob marked 5V, see photo a bit further down). Power is then supplied via a protection diode and 7805 voltage regulator, giving 5V. Incidentally, cutting the trace is harder than it seems - after cutting it, check there's no continuity between the 5V Vbus pad and the 3.3V pin.

 

 

Two momentary action footswitches do the switching: patch up -> pin 2, patch down -> pin 3

 

Cutting the hole for the USB socket - make sure the plug body can fit in to ensure a good connection.

 

patch_switcher_2.jpg.00ed78ad71e25d60cd2b3eb4f47c5d94.jpg

 

All the internals:

 

internals_all.thumb.jpg.bb950fc05ca889e92d5bb5ace046f469.jpg

 

Switches and power supply (I used 4-way male and female headers for 5V, ground, and the two switches to make it easy to split the two parts). The voltage regulator is bolted to the box, somewhat overkill for a heatsink but it does keep it anchored in place. The connector is centre negative and there's a diode in the positive line for reverse polarity protection (somewhat surrounded by heatshrink).There's not a lot of vertical space so the footswitches are as high as they'll go.

 

internals_switches_and_power.thumb.jpg.91196ac02420d5e1010dfb96a62f927a.jpg

 

A less obstructed view of the board. Note that the plain veroboard under the Arduino is simply there for insulation, and the two pieces above it are just to hold the Arduino in place - thinking about it more, with the benefit of hindsight, if I'd soldered the male headers pointing downward on the host shield rather than upwards on the Arduino, they would have protruded enough to solder a piece of perfboard with pads rather than strips on it to the underside which could have been used to fasten it all to the lid. You can see in this that I've run the 5V (red) to the Vraw pin, and from there a second red wire runs to the Vbus pad right behind the USB socket. There's heatshrink all over the place because this is so tightly packed. The GND and DTR that you can see written there are to make it easy to get the programmer connected the right way round, although that should no longer be relevant since I got it working properly.

 

internals_arduino_and_shield.thumb.jpg.1c5d884616ec6944ac21b7311ec4c109.jpg

 

In the program, set patchMax to 49 for MS-60B etc or 99 for G3/B3.

 

The program itself is pretty simple, it uses ezButton to handle debouncing etc. The only bits that might warrant further explanation are the delay loops in setup - the 7 second one is the pause for the MS-60B to get started up (from powering up to when the current patch appears on the screen) and the USB one is waiting for USB to get ready (behaviour is rather odd if that isn't in, took me a little while to work that out). Note that because it's not detecting the current patch number, it simply resets the pedal to patch 1 (program 0 in MIDI terms).
 

host_shield_mod.jpg

patch_switcher.jpg

ZoomPatchSwitch.ino

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this is very cool 

I am taking notes on your construction - on my midi switcher for a C4 synth I had perf board screwed to the lid and then headers - it wasn't great

I'm messing around with a pi pico thing to try and make usb host switching possible rather than midi 

 

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