From 21db4d1df4b3a3b7a2a6bf61d96d630abfe4d424 Mon Sep 17 00:00:00 2001
From: Eric Trombly <etrombly@yahoo.com>
Date: Fri, 19 Apr 2019 10:50:43 -0500
Subject: [PATCH] add sandbox example

---
 book/en/src/by-example.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/book/en/src/by-example.md b/book/en/src/by-example.md
index 0e09b03fb1..cafbc86cca 100644
--- a/book/en/src/by-example.md
+++ b/book/en/src/by-example.md
@@ -14,3 +14,9 @@ program. Check [the embedded Rust book] for instructions on how to set up an
 embedded development environment that includes QEMU.
 
 [the embedded Rust book]: https://rust-embedded.github.io/book/intro/install.html
+
+## Real World Examples
+
+The following are examples of RTFM being used in real world projects.
+
+- [etrombly/sandbox](https://github.com/etrombly/sandbox/tree/4f5a230920ad815c0cfbc0e0ae5e39718d3f58fa). A hardware zen garden that draws patterns in sand. Patterns are sent over serial using G-code.