From 4dd86737128b9148cf5aa410371361acff5f8aa8 Mon Sep 17 00:00:00 2001
From: Robert Hart <hart@physics.harvard.edu>
Date: Thu, 20 Sep 2018 12:18:13 -0400
Subject: [PATCH] rob's changes 010

---
 basic_concepts/index.html | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/basic_concepts/index.html b/basic_concepts/index.html
index 956b451..d522682 100644
--- a/basic_concepts/index.html
+++ b/basic_concepts/index.html
@@ -255,6 +255,8 @@ A good starting point for newcomers in the electronics field looking for what is
 
   - ####Capacitors in filters:  low pass and high pass.
 The charging and discharging of the RC combination makes capacitors useful as frequency filters.
+Discussion of symbol for ground used in the circuits below.
+
 
   ![CPC](imgs-filippos/lp_hp.jpg)
 
-- 
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