From 823c502df1f1ecc46e91d568469b06561c9773cf Mon Sep 17 00:00:00 2001
From: Tyler Perkins <tperki17@kent.edu>
Date: Fri, 12 Nov 2021 23:00:01 -0500
Subject: [PATCH] Update for 12-11-21 23:00

---
 tech/PCB.wiki | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tech/PCB.wiki b/tech/PCB.wiki
index 4245eb4..b2744e7 100644
--- a/tech/PCB.wiki
+++ b/tech/PCB.wiki
@@ -9,6 +9,8 @@ help you turn breadboard circuts into PCBs.
 == Structure ==
 
 * Components are connected with copper trace (wire)
+* PCB is several layers 
+  - Inner layers are usually GND or VCC
 
 == Software ==