Fulgorian Harp: [1] Guitar Sustainer Amplifiers

День тому

Check out Shane's Aeolian Harp (and other) music:
/ @theodoruscrow
I'll make you an Aeolian Harp, it helps me fund this project:
metalmarshmallow.com/product....
The contact microphone used in this video:
metalmarshmallow.com/product....
0:00 Introduction
1:45 Theoretical Overview
2:37 Buzzer Coils
4:09 Ebow Circuit Explained
5:49 Harmonic Mode Explained
8:08 Non Patented Sustainer Circuit
9:58 What it sounds like
12:19 What it really sounds like
13:00 Current and Waveform Measurements
13:31 Future Work

КОМЕНТАРІ: 33

@htomerif 18 днів тому

Ah, the sound of gridlocked, rush hour traffic right in my own window you say? And all it costs is tripling my HVAC bill? Where do I sign up?

@TylrVncnt 17 днів тому

😂💀👍

@MichaelKrzyzaniak 2 місяці тому

Followup: Today I built a version of the TLV4111 circuit with a TCA0372 instead. The TCA0372 can be powered directly by a 9V battery and can drive either a 8 or 16 ohm output coil. The 8 ohm one is almost too strong. The TLV4111 draws about 100 mA from the battery driving an 8 ohm coil, and the TCA0372 also draws about 100 mA driving a 16 ohm coil which is about the same strength as TLV4111 at 8 ohms. That would easily give you 5 hours of play time on a standard 9V. The TLV4111 circuit is only about 50% efficient due to the voltage regulator, whereas the TCA0372 is around 75% efficient. So I'd recommend TCA0372.

@Scrogan 23 дні тому

Now put a CD4046 after the comparator but before the half-bridge. If you use the standard type-2 phase comparator, you’ll get no phase shift and can set the frequency division with counters. But if you use the type-1 phase comparator, the frequency that it locks to will be more dependant on the VCO, and it will likely lock to harmonics. Putting a potentiometer as the VCO’s resistor will help you control what harmonic it locks onto. Guitar pickups are designed for magnetic reception, less so for actually stimulating the strings. The strings would be better stimulated by an inductor with an iron or ferrite core, as opposed to a rare earth magnet core.

@MichaelKrzyzaniak 16 днів тому

Great suggestions, thanks for the tips!

@Salador1777 13 днів тому

Great project!

@siim1129 2 місяці тому

I just got a idea to replicate ebow today. This was helpful. Thanks for the awesome video!

@Bugsworth 7 днів тому

Its always dubious meeting someone who is cleverer than i was.

@mindovermindfuck 2 місяці тому

Cool!

@Elektronijaenis 2 місяці тому

The problem with only one input coil and one output will probably be that such a system tends to favor the strongest resonance. This is how it usually works when you deg a guitar to doo controlled feedback with a loud amp. I'm quite sure that it will tend to just make one string really vibrate nicely and the rest will only have some symphatetic vibrations if the fundamental or the harmonics match up with the string that overpowers the rest. I wish I'm wrong though. It would be cool if it would modulate between the strings like your harmonic mode did between the harmonics of the single string. You could use separate coils and amps for different srings to get chords if nothing else works with multiple strings. Guitar pickups will probably work fine as the input coils as that's what they are built for, but the high impedance will probably make them impossible to drive hard enough with any sensible amplifier. I quess you knew at least most of this already, but anyway... Looking forward to see how thir project will progress.

@MichaelKrzyzaniak 2 місяці тому

AAhhhh, the spoiler is that I have already tried it and you are right about all of this! Why didn't you tell me like three months ago 😭

@Elektronijaenis 2 місяці тому

I didn't see a video three months ago. :) I'm sure that if I told you three months ago, you would have tried anyway.

@clubcyberia8572 2 місяці тому

reminds me of the hurdy gurdy drone string but with a slight phaser. what a fun instrument!

@dfxmonkeyhead 11 днів тому

In my experience with the ebow, changing the position of the exciter coil along the string's length will accentuate certain harmonics.

@novardifunkegenaamdkaiser3491 15 днів тому

DUDE!! WTF! That SOUNDED AMAZING!!! God! I need 48 Hours a day pleaze!

@seditt5146 5 днів тому

My god my stupid ass already stays up for 3 days at a time far too often if there was 48 hours in a day I likely still would and I would die.

@johnwhelan6115 11 днів тому

Day Tripper !

@Salador1777 13 днів тому

Other types of coils you can try are from a good sized relay! They are way bigger tho. But magnetics is weird the field is tuned to each application you want a concentrated field acting on the string. A speaker coil is more of a flat field to drive the whole diaphragm. In practice this is done by a double humbucker pickup one side is out other is input and i think you still take the signal out to your speaker.

@connlajones5222 Місяць тому

I will be shaving my buzzers down, to stop the buzzing ! My two heaviest wound strings are terrible for it.

@curtisnewton895 Місяць тому

I don understand that schematic where is the input ? how does it sense strings ?

@tychoclavius4818 10 днів тому

The sound is generated by the two coils and the string. No need for an in or output jack, the string is both oscillator and "speaker"

@mrrootytooty5797 29 днів тому

Knew there'd be an lm386 in there somewhere 😂

@gustavgnoettgen 27 днів тому

The aeolis harps I heard about were mounted on roofs.

@wizrom3046 9 днів тому

The person who "reverse engineered" that e-bow LM386 schematic made some major mistakes. Amatuerish. 😑

@kevrasx 10 днів тому

What about programming a PWM signal from a bastardized motor controller, or some microcontroller? The program could drive notes or harmonics without simply constant droning. May be possible to drive two notes concurrently. The PWM signal could replace the input pickup entirely.

@kenwatanabe2599 26 днів тому

COILS have polarity???

@MichaelKrzyzaniak 24 дні тому

Yes, they are wound either clockwise or anticlockwise as seen from above. Depending on which way the current flows through, the induced magnetic field will point either up or down through the coil according to some right-hand rule. Normally you wouldn't care, but in this case you do since you want to push (and not pull) on the string as it is moving away.

@yanikb.1312 23 дні тому

@@MichaelKrzyzaniak You can't push guitar strings using a magnet, not even using an electromagnet. Only pull. Or are guitar strings magnetic?

@MichaelKrzyzaniak 9 днів тому

@@yanikb.1312 The guitar strings are magnetic on account of being magnetized by the magnet. In my next video in this series I show the guitar string being pushed by the coil.

@fookingsog 6 днів тому

@MichaelKrzyzaniak Someone mentioned using relay coils. I'd suggest trying plunger style solenoid coils such as you find in a copy machine that is used to actuate gates for paper feed and whatnot. Instead of a ring magnet around the outside what if you used a cylindrical rare earth neodymium magnet in the center of the coil? 🤔 Another coil based device I encountered on copy machines is what is called a "magnetic clutch" used to engage a drive shaft with a gear when engaged. They have shorter height coil bobbins than the plunger solenoids. If you have any kind of copier repair shop near you, you might could give them a visit as they will most likely have a boneyard you can source from. Most of the plunger solenoids will be found in the finisher attached to the side of the main machine. Magnetic clutches will be mostly found at the back of the machine where the paper tray feed & transport is located. Several trays powered by a single motor and only when a Magnetic clutch is energized for a particular tray will it then start the paper pickup & feed process.

@woodybrison 7 днів тому

A 2GHz pentium goes fast enough to easily calculate waveforms like this in real time and still have bandwidth left over to play Tetris. This is what torpedoed the whole electronics hobby. It's good to see someone still into it.

@curtisnewton895 Місяць тому

dont use a 5v reg, use a buck