• EMF Reader – Assembly Notes for Wire Clips

    This is to help out folks making my DIY kit.  I took some photos while assembling my latest batch of EMF Readers.  Routing the wires can be tricky.  My method uses spare 22 gauge solid core wire, a soldering iron, and hot glue.  Makes the wires stay put. Click the infographic for a larger version.

  • Updated EMF Reader – Assembly Guide

    In 2015, I did a run of EMF readers with an updated design using an upgraded sound effects circuit.  This is an assembly guide for making that EMF reader. For my older EMF Reader design that is not dependent on custom parts, see here. There are two custom parts that you can purchase from me: thatdecade@gmail.com on etsy Hello Future Reader! This guide is somewhat outdated as of 2018 and is reference only. If you purchased a kit from me recently, you have the 0718 revision. Watch this youtube build video instead of following the guide on this page.https://www.youtube.com/watch?v=ce4PJZl9T2Y&t=1s&ab_channel=DustinWestaby Part List The part list was moved to google drive so I…

  • Light Break Sensor for Ammo Counter

    I have offered ammo counter kits for nerf dart guns for a while now.  With a tweak to the ammo counter software’s min time between fire events and the addition of a photo sensor, you can install my ammo counter kit on a nerf gun and keep track of shots remaining in your clip even while full auto firing. What allows this to work is a light break sensor.  The part number I recommend is the OPB100Z.  It comes with an IR LED and a Phototransistor.  The LED creates a beam of light, and the phototransistor acts as a switch.  When the light shines on the sensor, the transistor conducts and…