![TheScientificGuitarist](/img/default-banner.jpg)
- 82
- 220 258
TheScientificGuitarist
United States
Приєднався 28 гру 2018
Microcontrollers for Guitar and Effects: Designing a Relay Bypass Module
Using what we learned in the previous videos, we begin to design a relay bypass module for use in effects that will provide both toggling and momentary functionality in a very small footprint. This is the first of 3 videos in designing and testing the module.
Переглядів: 836
Відео
Microcontrollers for Guitar and Effects: Toggling a Relay
Переглядів 1,1 тис.4 місяці тому
In this video we look at the code necessary for sensing a button press input on one pin of an Arduino nano in order to control the output state of another pin. We look at the most bare-bones relay toggling as a practical application, which will set us up for developing the approach into a more realistic relay bypass module later on.
Microcontrollers For Guitar and Effects: Intro to Microcontrollers
Переглядів 4,5 тис.5 місяців тому
Microcontrollers open up a whole additional world of possibilities to those of use who are DIY'ers. From toggling relays to generating control signals, audio processing, and more, they allow for doing all kinds of incredible things. However, they are a big, wide world and it can be hard to know where to start. This video is the first in a series that walks you through microcontrollers from the ...
A DIY Tunable Pickup: Any sound, one pickup
Переглядів 61 тис.5 місяців тому
This tunable pickup came as a byproduct of my sustainer research and development activities. Using a low inductance pickup for wide bandwidth, a transformer to step up the voltage output, and a tunable shaping circuit, it is possible to get a vast array of sounds from a single pickup. This video deals with the physics of the system, the actual construction of the pickup, transformer choice, and...
Schematic Elements for Guitar and Effects: Comb Filtering and the Boss BF-2
Переглядів 8915 місяців тому
This video looks at how a flanger differs from a chorus by way of implementing comb filtering. This video builds off of concepts introduced in the Boss CE-2 video, so it is recommended to watch that one prior to this video.
3D Printing Metal Guitar Parts: 7 Things to Know
Переглядів 1,6 тис.6 місяців тому
Modern advances have made printed metal guitar parts accessible to the DIY'er, which opens up all kinds of possibilities. However, before you dive in head first, I share some things that I learned through having a handful of parts printed that will hopefully give you the information you need to be able to decide what will work best for you.
Schematic Elements for Guitar and Effects: Companders and the Boss DC-2
Переглядів 1,1 тис.6 місяців тому
This video looks at the almost-mythical Boss DC-2 and how it uses companders along with BBD devices to ensure a distortion-free signal. This video builds on the previous two about synchronized LFO's and BBD devices, so make sure to watch those as well: Synchronized LFO: ua-cam.com/video/38bL6D7tvSY/v-deo.html BBD: ua-cam.com/video/HClv3KP4-iQ/v-deo.html
Schematic Elements for Guitar and Effects: BBD's and the Boss CE-2
Переглядів 1,5 тис.6 місяців тому
Today we look at the legendary Boss CE-2 as an example of a circuit using BBD delay elements. We look at how BBD's function and how they are modulated to create the classic chorus effect.
Schematic Elements for Guitar and Effects: Synchronized LFO's and Harmonic Tremolo
Переглядів 1,1 тис.6 місяців тому
Today we look at how we can have multiple LFO signals that are perfectly synchronized for driving multiple parts of a circuit simultaneously. Our example is the brown face-style harmonic tremolo.
Schematic Elements for Guitar and Effects: Mu-Amps and the BSIAB
Переглядів 1,1 тис.7 місяців тому
Today we look at a transistor arrangement that results in very large amplification factors: the mu-amp. Originally created to get extra amplification out of lower-gain vacuum tubes, the mu-amp works with JFETS as well. For more mu-amp discussion, see www.geofex.com/Article_Folders/modmuamp/modmuamp.htm
Schematic Elements for Guitar and Effects: Differential Amplifiers and the Boss BD-2
Переглядів 1,5 тис.7 місяців тому
Today we look at the clever transistor arrangement used in the Boss BD-2. This schematic was chosen because it used to intimidate me when I was newer to building and I thought perhaps this video would help others in a similar situation.
Oscilloscope for Pedals and Effects
Переглядів 2,4 тис.7 місяців тому
This video gives a brief look at how you can use an oscilloscope for pedal design and advanced debugging. While every oscilloscope will have its own capabilities and features, they all have some in common that make them an indispensable tool for examining signals in a way that a multimeter or audio probe will never match.
Schematic Elements for Guitar and Effects: Resonant LC Circuits and the Vox Wah
Переглядів 8437 місяців тому
Today we look at the use of resonant LC circuits to create the classic wah effect. While we look at some of the basic functional mechanisms, you can find deeper technical analyses of this circuit at the following links: - www.geofex.com/article_folders/wahpedl/wahped.htm - www.electrosmash.com/vox-v847-analysis
Schematic Elements for Guitar and Effects: Twin T Filters and the Colorsound Inductorless Wah
Переглядів 8977 місяців тому
This video looks at a clever filter implementation called the Twin T filter and how, when used with a single transistor gain stage, can be used to create the classic wah effect.
Schematic Elements for Guitar and Effects: OTA's and the MXR Dyna Comp
Переглядів 1,3 тис.8 місяців тому
In this video we learn a little bit about operational transconductance amplifiers (OTA's) and their use in one of the classic compressor circuits: the MXR Dyna Comp.
Schematic Elements for Guitar and Effects: State Variable Filters and the MuTron III
Переглядів 7148 місяців тому
Schematic Elements for Guitar and Effects: State Variable Filters and the MuTron III
Triplicator - DIY Stereo Double Tracker with Effects Loops
Переглядів 7569 місяців тому
Triplicator - DIY Stereo Double Tracker with Effects Loops
Rubber Ducky - A Simple PT2399 Ducking Delay Pedal
Переглядів 76010 місяців тому
Rubber Ducky - A Simple PT2399 Ducking Delay Pedal
Escape Artist: DIY Stereo Ducking Reverb
Переглядів 56111 місяців тому
Escape Artist: DIY Stereo Ducking Reverb
Disappearing Act: DIY Ducking Spring Reverb
Переглядів 99811 місяців тому
Disappearing Act: DIY Ducking Spring Reverb
Winding a DIY Sustainer Driver, Part 2
Переглядів 4,3 тис.11 місяців тому
Winding a DIY Sustainer Driver, Part 2
Schematic Elements for Guitar and Effects: Semi-Parametric EQ and the Boss PQ-4
Переглядів 822Рік тому
Schematic Elements for Guitar and Effects: Semi-Parametric EQ and the Boss PQ-4
The Reverberatory - DIY Dual Delay and Reverb Workstation
Переглядів 751Рік тому
The Reverberatory - DIY Dual Delay and Reverb Workstation
Schematic Elements for Guitar and Effects: Simulated Inductance and the Boss GE-7
Переглядів 935Рік тому
Schematic Elements for Guitar and Effects: Simulated Inductance and the Boss GE-7
Schematic Elements for Guitar and Effects: Active Filters, the Tube Screamer and PT2399
Переглядів 896Рік тому
Schematic Elements for Guitar and Effects: Active Filters, the Tube Screamer and PT2399
Schematic Elements for Guitar and Effects: Passive Filters and Tone Controls
Переглядів 966Рік тому
Schematic Elements for Guitar and Effects: Passive Filters and Tone Controls
Desoldering: Tools and Techniques for Pedals and Effects
Переглядів 627Рік тому
Desoldering: Tools and Techniques for Pedals and Effects
Schematic Elements for Guitars and Effects: Transistors as Switches and the MXR Noise Gate
Переглядів 1,4 тис.Рік тому
Schematic Elements for Guitars and Effects: Transistors as Switches and the MXR Noise Gate
Kill Box - A Versatile Kill Switch Box for Guitar
Переглядів 369Рік тому
Kill Box - A Versatile Kill Switch Box for Guitar
Schematic Elements for Guitar and Effects: RC Envelope Follower and Optical Compression
Переглядів 993Рік тому
Schematic Elements for Guitar and Effects: RC Envelope Follower and Optical Compression
Love this delay, been using it for like 20 years haha tried others but this is my old reliable, great breakdown, thank you!
Dude, your envelope follower is wrong, you circled the threshold (just a volume control, or a "voltage divider") but you also circled the high gain clipper (IC1), the envelope follower is what's after that clipper. What does the gating is rather Q3 alone, it's the variable resistor. Then later you say that IC2 is connected to Vref via C9, but C9 get rids of DC, so IC2 isn't connected to Vref at all, but rather VB (the two 1meg resistors you removed). R18 at the end is just "common on some effects" it's to prevent the IC to oscillate when unplugging the guitar cable. R7 (you mean R8) and C3 is not a low pass filter but high pass, however there is some kind of low pass filtering going on, but it's because of the slew rate of the op amp that cannot provide the gain on the whole audio spectrum, if the slew rate were infinite you wouldn't have that low pass filtering going on. A part from these mistakes, the rest of the explanations are correct.
Excellent Video, thank you. Is there any chance you could make a similar video for the Boss BF-3. For years, I have never understood what its "Ultra Mode" is doing, and I would dearly love to know. (I also have a Boss BF2).
@thescientificguitarist4228 I'm not getting a smooth gating action on my '79 MXR MX-106 Noise Gate. It seems to crackle and oscillate as it's gating the signal. Can a bad Q2 cause the gate to do this as it's clamping down on the signal? I've literally replaced everything else on the board except the BJTs and it works exactly as crappy as when I got it. If I do replace the BJTs I have 2N3904 and BC337 to choose from. I'm leaning toward the BC337 and I belive they are pin compatible. Thanks for any help.
Большое спасибо! Я сейчас проектирую дисторшн педаль и задумался о внедрении активного фильтра. Ваше видео пришлось очень кстати!
I don't understand how you flip flopped the terminals..what do you mean..the ics only go in one way...
Yup nailed it: decades of proprietary hoodoo from EMG and the like debunked. Also, the sound shaping actually really works! I would suggest not having the magnetic flux too high to avoid damping the actual guitar strings, or getting wolf tones.
That was very helpful. Thank you. Great video.
I like these for my 98 parker fly deluxe. Height might just be doable or a slightly smaller bobbin
Fantastic. Did you pot the coils? Is it unnecessary ?
Will you be republishing your driver circuit? I think you took it down due to some issue you found with it?
this is awesome! i love your channel man. greetings from buenos aires
Any thoughts on a kit I can purchase. Not so sure how to source these parts. Thank you for the work this is exciting. I use high gain equipment and have wanted a low output pickup for a long time. Metal and doom primarily. You have my attention.
yay LTspice!
Thank you this very informative! I have a CE-2 that only outputs the dry signal. I don’t get a chorus effect when it’s engaged. Do you think it could be something with the summing section or maybe the LFO? Everything looks fine when I opened up as far as cables and connections. Any troubleshooting advice would be greatly appreciated! Thanks
Can you post a demo of the final product? I've been working on my own sustain/feedback driver, from a totally different direction - I would love to share it with you, because I'm pretty much stuck now, trying to create a small solution using an exciter speaker (instead of a pickup).
Not working. Only dry signal is working. Should pin3 and 4 not be grounded?? Checked schematics 10 times, no errors. Swapped pt2399, same results. Full 9v battery, check so what else could b wrong?
more or less like a "magnetic piezo" pickup?
I really appreciate all the info. Thank you for sharing your insight. I need to look and see if you have a tutorial on oscillation, Thanks again!
Good project! Unfortunately I was missing a demo of the sound shaping circuit. Could this be added, please?
where is the sound dude? we dont hear enything
where do I buy the kit?
How the value of the power supply voltage divider resistors (R7, R8) is calculated? Some effects use 10k, others 100k.
8:00 it's a good idea to keep the chuck key with your hand when using a lathe. It'll smash you real good if you forget about it and turn it on.
Hell yeah any machinist will tell you about that one. You find out super fast the first time you ever forget these things. We kept ours on a chain and you just made it a habit to drop it hard before hitting the button. Hearing the key bang the machine becomes something you notice if it doesn't happen each time.
can we add a Tap Tempo to echoplexus?
Dude you are totally amazing. This is an amazing walkthrough of the PT2399. Im a total beginner and just started learning about the PT2399. I struggled for a few hours to get a circuit working on a bread board till i found this. This is by far the most in depth explanation that i can find and actually completely understand. I built this on a bread board in like 10 mins and it works flawlessly like you describe. But i want some high frequency in mine. You mention that R10 and C12 form a RC filter and also R16 and C15 form another RC filter. you also said C20 was doing some high frequency filtering. I tried removing R10, C12 ,R16 and C15 and the wet signal sounded about the same. being a total beginner and not knowing what I'm doing i also removed the C20. Everything i remove seems to have very little affect on the wet signal, its just dark. My dry signal is very crispy but the repeats are just not bright enough for my taste. You have any quick insight on getting more treble out of this? Any help is greatly appreciated.
nice tuturials
So does anyone know how you connect this device to a Delay Pedal? How do you connect the guitar?
I’m not an electrical engineer or anything close to that, but I love modding guitars, and I want to try this out. But I don’t really understand how to make it change voicings on the fly. I think a toggle system would be really nice to easily change voicings and get the same result every time (as opposed to a less accurate, albeit more versatile, potentiometer).
I've been trying to Program the ATTiny85 chip with my Arduino Nano following your instructions, but I can't get it to compile and upload to the chip. I downloaded your ATTiny85.ino file from your Tap Temp site on GitHub, but I'm not able to get it to upload to the chip. Can you help me on this?
I discovered that my sketch was not in its own folder, so I created that and now the sketch is in its folder. When I run the upload to the Tiny85, I get the error that the Sketch is too large--Here's the error: "Sketch uses 4152 bytes (202%) of program storage space. Maximum is 2048 bytes. Global variables use 69 bytes (53%) of dynamic memory, leaving 59 bytes for local variables. Maximum is 128 bytes". So how do I resolve this?
IS there an example of you hooking up the driver tot the electronics, cause I'm a bit lost in that area?
Do you have a more high res picture of the full circuit that's on the webpage 'Reverse Engineering a Sustainiac Sustainer'? I didn't find it in the github. I don't find the transformer in the schematic. Where should this be located and connected to the driver. Hope you can help me out.
It looks like my previous attempt to post a comment got lost. Anyway, I'm building a basic delay pedal kit with 1 PT2399 chip, and I'd like to add Tap Tempo that has presets of quarter, eighth and dotted eight note capability. Looks like this would do it. I've gone to your other channel and read about construction of this project, and then went over to your GitHub site and downloaded some of the files. I'm interested in doing the through the hole project. So do I download that Gerber file and then order the board to be built by a PCB company? Obviously I've never done this before. Will I also have to acquire an Arduino and program any of the IC"s on this board? As to the other files for parts and values, which are the files for the through the hole board, and which is the current version? Can your schematic be downloaded, since it's hard to read the information on the parts and connections? And, am I correct that this cannot be used with an analogue delay pedal using the Bucket Brigade chips? Sorry for all the questions.
Great information; great video; bravo! I have seen circuits designed with this chip for echo and also delay - on the same data sheet, IIRC. I found that fact to be confusing. I could not tell if just one chip could be made to do both functions (at the same time,) or if two chips and separate circuits would be needed? That holds true, for the chorus function, as well... Are separate 2399s needed for each function, or can one chip do all three effects? Thanks!
Nice video! Have watched nearly all of yours, but never really come across a "dripping" (Dick Dale, surf rock) spring reverb on the channel. Is it even possible to build such a reverb just on pt2399's?
Thanks for the project files on this, how do you test the pcb that everything is correctly working? with oscilloscope and such. maybe you can make a detailed video on this pedal
BYU?
Yep, class of '07 and '09
@@thescientificguitarist4228 I grew up in Provo 😉
Well, I have to breadboard this now. Thanks for the inspiring rundown. 🤙
Glad you liked it!
For one thing, most "guitar people" (especially UA-camrs) are fantastical, fantasy believing, room temperature IQ individuals. So, what you're talking about is way over their heads. Your sound results are no different than what you can get out of volume/tone adjustments and adjustments of an amplifier. Just like multi-scale or more strings. The question is, where are all the great hit songs we can all enjoy from all these "revelations". Everyone forgets that guitars are more composing music! People blame not having the magical guitars that the "Jimmies" had as to why they can't write songs. WTF!
Hey, I'm wondering if you could explain what Q7 and Q8 do? I'm not sure what their purpose is and how they're connected. Are their gates not connected to anything?
Q7 and Q8 are JFET's that are used in Boss' flip flop buffered bypass scheme. I don't look at them in the video because they aren't part of the pure signal path.
Great video. Why is R1 and R2 necessary if we already have a voltage divider (VR)?
R1 and R2 are used to set the reference voltage to set the LFO into oscillation. Often this is slightly different from VR for a couple reasons. First, to not introduce noise onto the VR rail. Second, the voltage is often slightly different because most opamps won't work at or near the power rails, so the voltage is set a little bit off. It really comes down to the LFO design.
@@thescientificguitarist4228 thanks for the explanation!
newbie here. I'm trying to build a really simple on/off high pass filter for my bass guitar so i can get some clean chords from it, since it's a 4 string tuned down to low B. do you guys have any idea on what i would need to build it using a microcontroller? this has been really helpful
Can I ask why you want to use a microcontroller for something like this? Is there a reason to not use a mechanical switch or a flip-flop bypass?
@thescientificguitarist4228 i would like to learn about this process for future more complex projects involving a microcontroller, but i don't know, should i start with all analog?
IS THIS KIT AVAILABLE???
Currently it is not. I am all packed up for moving and don't know when or if I'll get a new batch in. If you are really interested, you can contact me through my webpage so that I can keep track of whether there is enough demand for making up more kits or not.
Heyo! Just found this. Subbed. Thanks for the video
Glad you like it!
Do this with hot rails!
You could easily do it. Just two low impedance coils, step up the voltage, and shape to taste.
I've needed this video, great explanation! Thank you very much!
You are very welcome! Thanks for watching!
I'm a novice who isn't beyond pedal pcb boards. So no schematics for me yet. That said, I want to create a distorted chorus in one circuit. Can I mod this circuit to add distortion. "Saturate the bbd" is beyond me at this moment, so would you mind explaining how I would do that? Is it something worth my time or would it just create useless noise? Thanks in advance. Appreciate your channel!
For this particular pedal, the companders will prevent saturation, as that is their job. Also, I've never tried saturating one, so I don't know if it is musical/usable.
Can a hard clipping overdrive clean up with guitar roll volume?
Yes, as real life diodes aren't perfect clippers. They have what is called an I/V curve that determines how hard the clipping knee is. Most diodes of a certain type (silicon, LED, germanium, etc.) will have general characteristics, but can vary somewhat. You need a special tester to test for this (I'm sure you could homebrew something, but I've never tried).
Thank you for explanation! It also helped a lot that you connected JFET and C8 correctly, unlike what you find on internet ;) Any ideas what C9 and R11 are for?
C9 is the DC blocking cap for the output opamp, so that the negative terminal is not pulled up to VREF. R11 serves as a feedback resistor for Q2.
@@thescientificguitarist4228 R11 understood. C9 It's about why this link exists at all. It adds like half of the audio signal to the gate voltage of the JFET. Other circuits I've seen also do so. Anyway, thanks to this video I was able to understand how more complicated noise gate (boss nf-1) works, and to design by own noise gate based on that, and it works! Thanks a lot again!
What are actually the advantages of two separate coils instead of one?
You get the hum rejection before stepping up with the transformer, so it's truly humbucking but with a very flat response.
@@thescientificguitarist4228 I think that is an answer for a pickup. But for a sustainer, humbucking doesn't matter right? Maybe with amplifiers that handles 4 ohms you could drive them separately and set the output optimally for each group of 3 strings.