This page covers the various topics needed to maintain your freETarget

Setting the Trip Point

freETarget works by listening for the sound of the projectile passing the microphones. In a perfect world, you want to set this as low as possible, but in the real world the sound of other shots might set it off. This document lets you adjust the trip point to your environment.


Downloading Firmware

Firmware updates to the Arduino can be downloaded through the PC program. The most recent software is available on the downloads tab of this web site. Instructions to flash the firmware are here:


Target Illumination

freETarget Version 3 and higher supports a LED strip to illuminate the target. The installation instructions are here:


Going Wireless

This document provides the instructions for attaching an ESP-01 to the target to connect to the PC wirelessly. You will need to purchase an ESP-01 from Amazon and make a cable harness.


Optional Serial Interfaces

For situations where ten meters just isn’t good enough, there are optional serial interfaces that can be attached to the Auxiliary Port.


Using the Accessory Connector

The Accessory connector provides a back door into the target hardware to let you attach new interfaces or connect to the witness paper motor drive.


Using Witness Paper

Witness paper provides a consistent background for capturing shot sounds. This document illustrates the assembly of the paper drive and a bill of materials for parts.


Using the MultiFunction Switches

freETarget supports two switch inputs for adding extra functionality, for example a paper feed for the witness paper motor.