SKU: 35735957401

Pedal Brainz Left Brain Expression Pedal

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Description

Pedal Brainz Left Brain Expression PedalMaker: Pedal Brainz Model: Left Brain Condition: New Description: LEFT BRAIN EXPRESSION MODULATOR The Left Brain is a light controlled expression pedal that interfaces with effects offering expression control. Controllable patterns of light result in the virtual turning of knobs when used in conjunction with the available properties of a compatible effect pedal. Over 50 Modez of controllable expression, an expression pattern loop recorder, and a host

Maker: Pedal Brainz

Model: Left Brain

Condition: New

 

Description: 

LEFT BRAIN - EXPRESSION MODULATOR

The Left Brain is a light-controlled expression pedal that interfaces with effects offering expression control.

 

Controllable patterns of light result in the virtual turning of knobs when used in-conjunction with the available properties of a compatible effect pedal.

Over 50 Modez of controllable expression, an expression pattern loop recorder, and a host of other features to harness the potention waiting in your effects pedals.

LEFT BRAIN - CREATIVE EXPRESSION

What if you could get a little more modulation from an effect on the floor, without resorting to yet another giant-sized foot-controllable expression pedal.

 

Tired of repeating patterns of sine/ square/ triangle waves and eager to break the cycle with some constrained randomness?

Check out the documentation for an overview of the different modez, controls, and features.

NEW FEATURES IN VERSION 2

v2 - Arduino Upgrade - The Arduino QTPY replaces the Gemma M0 from v1 for even more creative computer controlled opportunities. With open-source software and full programmability, the Left Brain can be adopted and expanded to allow for any controllable patterns of light you can imagine.

v2 - LED Backlit Knobs - The Left Brain now features addressable LEDs behind each knob in v2. With light no longer confined to the inside of the enclosure, additional feedback can be provided about the different Modez through light. With the newly expanded Arduino capabilities there are now 5 total addressable LEDS (2 internal, 3 external) which can be configured to either modulate the expression or provide illumination through the knobs. Additional consideration has been made to allow for the scaling of the knob lights through software so you can choose how bright they are on the outside. 

v2 - Buttons - Two buttons replace the complicated dance of knob turning from v1 and makes changing between new Modez and Banks of Modez easy. This also means the ability to create utility and special Modez.

 

v2 - Voltage Regulator - Leveraging standard 9v center-negative effect pedal power means stepping down to 5v to power the Arduino and LEDs in the Left Brain. While the voltage divider used in v1 worked great to power the Gemma M0, the addition of LEDs behind the knobs in v2 has increased the need for stable 5v power. The left brain now uses a 1117 5v Voltage Regulator that is surface mounted on the expression board.

 

v2 - Surface Mount Resistors - Each of the models in the Pedal Brainz Series can be easily adapted to provide different resistance to ensure maximum compatibility across the specifications of different effect pedals. This is achieved through a matrix of resistors that can be switched between (10k, 25k, 100k) in-conjunction with the scale knob, bringing flexibility and creativity. While the through hole resistors of v1 allowed for greater modding flexibility, v2 uses tiny surface mount resistors that make production faster.

LEFT BRAINZ

Have you ever wished for a tiny semi-sentient clone of your brain to turn the knobs of effect pedals while floating effortlessly across the fretboard without worry?

Do you like watching patterns of flashing light working in concert with the parameterization of effect properties while jumping off the deep-end of reality?

Harness the fully configurable power of your Left Brain and unlock the creative expression waiting for you with Pedal Brainz.

LEFT BRAIN - CREATIVE EXPRESSION

What if you could get a little more modulation from an effect on the floor, without resorting to yet another giant-sized foot-controllable expression pedal.

 

Tired of repeating patterns of sine/ square/ triangle waves and eager to break the cycle with some constrained randomness?

Check out the documentation for an overview of the different modez, controls, and features.

v2 - Arduino Upgrade - The Arduino QTPY replaces the Gemma M0 from v1 for even more creative computer controlled opportunities. With open-source software and full programmability, the Left Brain can be adopted and expanded to allow for any controllable patterns of light you can imagine.

v2 - LED Backlit Knobs - The Left Brain now features addressable LEDs behind each knob in v2. With light no longer confined to the inside of the enclosure, additional feedback can be provided about the different Modez through light. With the newly expanded Arduino capabilities there are now 5 total addressable LEDS (2 internal, 3 external) which can be configured to either modulate the expression or provide illumination through the knobs. Additional consideration has been made to allow for the scaling of the knob lights through software so you can choose how bright they are on the outside.

v2 - Buttons - Two buttons replace the complicated dance of knob turning from v1 and makes changing between new Modez and Banks of Modez easy. This also means the ability to create utility and special Modez.

 

v2 - Voltage Regulator - Leveraging standard 9v center-negative effect pedal power means stepping down to 5v to power the Arduino and LEDs in the Left Brain. While the voltage divider used in v1 worked great to power the Gemma M0, the addition of LEDs behind the knobs in v2 has increased the need for stable 5v power. The left brain now uses a 1117 5v Voltage Regulator that is surface mounted on the expression board.

 

v2 - Surface Mount Resistors - Each of the models in the Pedal Brainz Series can be easily adapted to provide different resistance to ensure maximum compatibility across the specifications of different effect pedals. This is achieved through a matrix of resistors that can be switched between (10k, 25k, 100k) in-conjunction with the scale knob, bringing flexibility and creativity. While the through hole resistors of v1 allowed for greater modding flexibility, v2 uses tiny surface mount resistors that make production faster.

LEFT BRAINZ

Have you ever wished for a tiny semi-sentient clone of your brain to turn the knobs of effect pedals while floating effortlessly across the fretboard without worry?

Do you like watching patterns of flashing light working in concert with the parameterization of effect properties while jumping off the deep-end of reality?

Harness the fully configurable power of your Left Brain and unlock the creative expression waiting for you with Pedal Brainz.

HARDWARE FEATURES

3 Control Knobs:
Adjust the properties of light patterns and expression. (See Banks/ Modez below for property details)

2 Buttons:
Single-click to Increase or Decrease Mode number.
Double-click to Increase or Decrease Bank number.
***Bank change always begins with Mode 1 of new Bank***

Expression Type Switch (EXP / EYE):
Choose between manual expression (EXP) or engage the internal photocell (EYE) to add light-based control.

Scale Knob:
Variable control of the Maximum expression value.

Range Switch ( Least | / Less || / Full ||| ):
Adjusts the Maximum range of the Scale Knob.

Tip Direction (TR / RT):
Swaps the direction of expression between Tip-Ring (TR) and Ring-Tip (RT) for greater compatability across effects.

TRS 1/4" Jack:
Requires TRS (Tip, Ring, Sleeve) between Pedal Brain and effect.

DC Jack:
Tip Negative, Sleeve Positive.

USB-C Jack (Internal):
For accessing the internal Adafruit QTPY platform.

MODULATION WAVEFORMS

50 Modez are accessible across 5 Banks featuring an incredible selection of favorites as well as many which have been specially formulated to add unique expression and constrained randomness.

Greatest Hitz: While each mode is unique in this Bank, they cover the basics represented across the other Banks and are the perfect place to begin exploring Expression Modulation.

Shapez: A collection of Modez that fall into the Square and Triangle shaped modulations category, with a few surprises.

Rainbowz: Undulating color sequences with various static and random variations that can be modified.

Naturez: The great outdoors represented though color patterns, spontaneous eruptionz, and wild abandon.

Attractorz: Based on the Strange Attractors branch of mathematics, these modez provide creative, and often, non-repeating and steadily evolving patterns.

MODULATION CONTROLZ

Each Mode comes with a unique set of controls that allow for the fine tuning of modulation. Special focus has been put on creating Modez that are both functional and creative, often bringing the ability to refine or extend randomization to reign in the wild oscillations when called for or let loose with suprose and delight.

Here are some additional features that make the Pedal Brainz Left Brain unique:

External Brightness Control: This Mode sets the Maximum Brightness for the External Controls. If the external lights are too bright, you can turn them down using this Mode without effecting the Expression values.

Light Loopz - Expression Looper Mode: Light Loopz allows for the Recording of a combination of Manual Fade and/ or Momentary Full Brightness that plays back with adjustable Speed and Brightness.

Duration/ Speed Multiplier: This Mode sets a Multiplier Amount that can be used to extend/ slow the duration of the cycling x1, x2, or x3.

Plus a few other hidden features!


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    Exchange/Return Notes
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    SKU: 35735957401

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    4.5 ★★★★★
    Based on 21 reviews
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    Bill
    Cuba, US
    ★★★★★ 5
    Great product, well made, would buy again!
    Size: 8" Edger New
    Great product, well made, would buy again!
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on April 20, 2026
    K
    Verified Purchase
    KimberlyY
    Port Orchard, US
    ★★★★★ 5
    Uses same battery as the rest of my equipment
    Size: 8" Edger New
    Since I already have and like the Greenworks mower, string trimmer and blower it only made sense to get the edger. Even better that I didn’t need to buy more batteries. I tried another name brand electric edger and returned it for not holding a charge. This one works great! There’s charge left in the battery after everything has been edged. I was concerned how easy it would be to control but fell in love with it first time I used it. To use just pop the battery in, flip the thumb lever, squeeze and edge. Not as noisy as gas powered equipment and no cords to pull. Feels sturdy in my hands and a good weight that’s enough to not pop up if it hits something but not too much to be heavy to carry back to the shed.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on October 29, 2025
    T
    Verified Purchase
    Texas Gal
    Port Orchard, US
    ★★★★★ 5
    First use was great!
    I've used it just the one time today. I had previously "edged" with a string weedwhacker, so while the grass was cut back some, there wasn't a trench dug out. I did a gentle push and pull, taking on about 18" at a time to get a new trench dug next to the sidewalk edge. It did a great job! The entire unit was much heavier and sturdy looking than I was afraid it would be for the price, so pleasantly surprised. Assembly wasn't complicated, but it did take two of us to hold it steady because getting the screws to seat in the square hole and not have the cord in the way was a bit tricky. I'm a 70+ lady, not large and not athletic, but I was able to handle this edger with ease. Now, to see how long it lasts!
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on July 11, 2025
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    Verified Purchase
    James E Morris
    Alexandria, US
    ★★★★★ 5
    Not expensive
    Gets the job done
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on April 27, 2026
    K
    Verified Purchase
    Katy
    Lake Worth, US
    ★★★★★ 4
    Great Yard Helper!
    So easy to use and affordable! This edger is a great time saver, easy to operate, and relatively easy to adjust although you may need a pliers or screwdriver to help with the adjustment levels, but its not difficult. I would have given this 5 stars but just one thing that is a sticking point for me is I wish this had its own stand or hanger because of its odd shape, it doesn't necessarily balance upright too well. It’s long and the guide wheel in the front sticks out. So, it is always awkward to get it tidy in the garage when not in use. Now maybe this is what it's like for landscapers…I’m not a professional. Just a homeowner doing my own upkeep. With what this costs, I’ll figure it out, and is worth the money.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on December 30, 2024

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