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GRasPi - a Raspberry-Pi based guitar amplifier (Canceled) project video thumbnail
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€330 pledged of €35,000 goal
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By Sandro Bechelli
€330 pledged of €35,000 goal
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What is a prototype?

A prototype is a preliminary model of something. Projects that offer physical products need to show backers documentation of a working prototype. This gallery features photos, videos, and other visual documentation that will give backers a sense of what’s been accomplished so far and what’s left to do. Though the development process can vary for each project, these are the stages we typically see:

Proof of Concept

Explorations that test ideas and functionality.

Functional Prototype

Demonstrates the functionality of the final product, but looks different.

Appearance Prototype

Looks like the final product, but is not functional.

Design Prototype

Appearance and function match the final product, but is made with different manufacturing methods.

Production Prototype

Appearance, function, and manufacturing methods match the final product.

2571506943db153844023f231033bfb1 original

Prototype Gallery

These photos and videos provide a detailed look at this project’s development.

About this project

GRasPi is a 15W guitar amplifier, battery powered, backpack frendly, borned as an accessory for Raspberry-Pi, it is a small amplifier with a clean channel internally connected to an audio codec that harnesses the power of the Raspberry-Pi to run open source app like Guitarix (or others) which, controlled from an external MIDI pedal, offers a very large variety of custom sounds to the musician. The long battery life allows a good autonomy even to street musicians, furthermore with appropriate software the MIDI input port can be used with a master keyboard and enable its use simultaneously with a guitar.

Flow chart
Flow chart

Open-Source Software

The Raspberry-Pi hosts Linux kernel based operative systems, GRasPi was tested using Jessie operating system (https://www.raspberrypi.org/blog/raspbian-jessie-is-here/) and Guitarix (http://guitarix.org/), an excellent open source application based on jack audio engine (http://www.jackaudio.org/). To interface with Raspberry-Pi GRasPi uses the widespread WM8731 audio codec (http://opensource.wolfsonmicro.com/content/linux-drivers-wolfson-devices), so everyone can easily change the software according their needs.

RPI desktop from VNC
RPI desktop from VNC

The best way to access the Raspberry-Pi's desktop is via wireless with VNC, so you can experience the sounds you prefer and create your own presets, for your gigs you can simply use a MIDI pedal to handle them.

Backpack Friendly

The small size and low weight combined to battery (3-cell 2600mAh 18650) make it the perfect companion of your guitar or an alternative when you don't have the opportunity to use your large and heavy amplifier.

Inside the GRasPi
Inside the GRasPi

 

The Raspberry-Pi is not included

Our choice is to not include the RPI in the GRasPi package, given its low cost and wide availability those who already were not in possession can buy it easily online. We will supply basic images for Raspberry with Guitarix installed and configured so that everyone can download and modify it as per their choice.

Risks and challenges

The risk itself is very low, the project is almost finished, they were built few prototypes and conducted several tests, others are in progress, what is missing is the industrialization phase, aimed at keeping the final cost low as planned, it may be that we will make some minor adjustment to the design according to the tests results.

By the end of January we should have the approvals required by the various countries, after which parts production will start; since there are no critical components we do not expect delays, the first shipments are planned for March 2017.

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  1. Select this reward

    Pledge €1 or more About $1.06

    A bit of help

    A small contribution, thanks for the support!

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  2. Select this reward

    Pledge €275 or more About $292

    GRasPi package #1

    Get 1 GRasPi amplifier at very early price

    Note: Raspberry-Pi is NOT included

    Includes:
    • GRasPi amplifier
    • 30W wall mount power supply
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  3. Select this reward

    Pledge €300 or more About $319

    GRasPi package #2

    Get 1 GRasPi amplifier at early price

    Note: Raspberry-Pi is NOT included

    Includes:
    • GRasPi amplifier
    • 30W wall mount power supply
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  4. Select this reward

    Pledge €325 or more About $346

    GRasPi package #3

    Get 1 GRasPi amplifier at regular Kickstarter price

    Note: Raspberry-Pi is NOT included

    Includes:
    • GRasPi amplifier
    • 30W wall mount power supply
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  5. Select this reward

    Pledge €375 or more About $399

    GRasPi package #4

    Get 1 GRasPi amplifier with Raspberry-Pi 3 mod.B and Raspbian Jessie + Guitarix installed and configured

    Includes:
    • GRasPi amplifier
    • Raspberry-Pi 3 mod.B
    • 16Gb SD card with Raspbian Jessie and Guitarix already installed
    • 30W wall mount power supply
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Funding period

- (30 days)