DIY Dual Channel Fiddle Mic and Pickup Muting Pedal: Build and Test

In this video, a fiddler explains why amplifying an acoustic fiddle is challenging and demonstrates how to build a compact dual channel mute pedal that silences both a microphone and a pickup. The project uses a two-input, three-channel switch, an LED indicator, and a simple soldering workflow, all housed in a plastic box sourced from a makerspace. The maker walks through wiring diagrams for two common mute methods, tests each channel with clip leads, and finishes with a fully functional unit that can mute both mic and pickup together at the press of a button. The overall cost is kept low, and the builder reflects on improvements for a more robust enclosure.

• Mute both mic and pickup with one pedal
• Mic muting relies on inverted signal design to suppress interference
• Two inputs, one mute button, LED indicator for status
• Hands-on soldering, drilling, and enclosure fabrication at a makerspace

Overview and Motivation

This video documents a maker who plays fiddle in a bluegrass band and wants to mute both a clip-on microphone and an embedded pickup without muting the entire stage. The host explains the basic trade-offs between a mic and a pickup and outlines a practical solution: a dual channel mute pedal that can silence both inputs with a single switch and provide a visible LED indicator when muted. The approach emphasizes accessibility and cost efficiency, leveraging readily available parts and a local makerspace for tools and materials.

Project Design and Components

The design uses two inputs, a mic and a pickup, plus a three-channel switch to control mic, pickup, and an LED indicator. A 9-volt battery powers the unit, and a simple resistor limits LED current. The enclosure is a plain plastic box chosen for ease of modification, with the builder noting that a metal box would be more durable. Key components include two guitar cables for inputs and outputs, a switch, LEDs, resistors, and basic wiring supplies. The builder emphasizes cost: roughly 20 to 30 dollars if you already have tools or access to a makerspace.

Electrical Principles in Plain Language

The pickup muting is straightforward: two wires are shorted so the signal cannot reach the amplifier. The microphone muting relies on a more nuanced technique where the two signal lines from the mic are inverted relative to a fixed reference and then combined in a way that cancels out the signal when muted. The LED provides a simple visual cue to confirm the mute state. The builder also covers practical testing steps using alligator clips before soldering permanently, which helps verify the mute behavior in a safe, incremental way.

Assembly, Soldering, and Testing

After wiring diagrams are consulted, pieces are arranged in the box. The builder notes this was their first real soldering experience and mentions common beginner challenges such as color-coding wires and ensuring the necessary wires pass through holes before soldering. Step drill bits are recommended for making hole sizes in thin plastic, with careful attention to space inside the box to avoid damaging components. Soldering is followed by applying heat shrink tubing for a clean finish, and a quick LED circuit test verifies the mute indicator remains functional.

Final Product and Reflections

The finished product includes two inputs, a single mute button, and a red LED indicator. The builder reports achieving the desired behavior: muting both microphone and pickup simultaneously with one switch. The total build time is reported as eight to nine hours, including filming. The builder notes that a metal enclosure would improve durability and scratch resistance. The video closes with encouragement to tinker and build similar DIY electronics projects, highlighting the satisfaction of creating a functional tool tailored to one’s own hobby.

Sponsorship Note

Separate from the build content, the video includes a sponsor segment for Brilliant.org. The sponsor portion is not central to the instructional content of this article.