From 1abdffb9e15784d1614dad88d5a6f710e8d46411 Mon Sep 17 00:00:00 2001
From: Sam Calisch <s.calisch@gmail.com>
Date: Sun, 4 Nov 2018 10:42:00 -0500
Subject: [PATCH] add link

---
 gpio/atsamd51/index.html | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gpio/atsamd51/index.html b/gpio/atsamd51/index.html
index a86988b..1227944 100644
--- a/gpio/atsamd51/index.html
+++ b/gpio/atsamd51/index.html
@@ -20,7 +20,7 @@ pre code {
 <figcaption>Ring oscillator with ATSAMD51J19</figcaption>
 </figure>
 
-<p>This ring oscillator runs on the ATSAMD51J19 MCU using the Adafruit Feather dev board.  The ATSAMD51J19 has an ARM Cortex-M4 running with a max speed of 120 MHz.  Code for the oscillator is available <a href='ring.ino'>here</a>, or visible below.</p>
+<p>This ring oscillator runs on the ATSAMD51J19 MCU using the Adafruit Feather dev board (though dev board price comes from <a href='https://www.adafruit.com/product/3800'>Adafruit ItsyBitsy M4 Express</a>).  The ATSAMD51J19 has an ARM Cortex-M4 running with a max speed of 120 MHz.  Code for the oscillator is available <a href='ring.ino'>here</a>, or visible below.</p>
 
 <pre>
 <code>
-- 
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