Add soldering note

Author: prcutler

README.md

@@ -2,6 +2,8 @@
 
 The `speakerstand-lights` project is written in CircuitPython and     uses a [NeoPixel FeatherWing](https://www.adafruit.com/product/3124), an [Adafruit Feather rp2040 Pico](https://learn.adafruit.com/adafruit-feather-rp2040-pico), and a digital microphone breakout board. I used an [I2S mic](https://learn.adafruit.com/adafruit-i2s-mems-microphone-breakout) and any *digital* mic will work, but not analog. Together, they create a sound reactive spectrogram displayed on the NeoPixel FeatherWing's pixels.
 
+You will need to know the basics of soldering to stack the Feathers and to attach the microphone.
+
 ### Part 1: CircuitPython Code
 
 Thank you to Adafruit, including Kattni Rembor and Philip Burgess, for the [Adafruit EyeLights LED Glasses Music-Reactive Lights](https://learn.adafruit.com/adafruit-eyelights-led-glasses-and-driver/music-reactive-lights) project.  Better yet, it's released under a MIT license making it easy to modify.  Using this code, I only had to change a few lines to make it work with the NeoPixel FeatherWing!