Add Si4703 FM radio receiver entry

Author: eldruin

content/2019-12-26-newsletter-22.md

@@ -41,9 +41,15 @@ If you want to mention something in [the next newsletter], send us a pull reques
 
 - [@andre-richter] released v0.1.0 of [`qemu-exit`]. This library provides functions to gracefully exit a running QEMU session from within your Rust binary with an user-defined exit code. This can be used for unit or integration tests that run inside QEMU. Currently supports `aarch64` and `x86_64` architectures. 
 
+- [@eldruin] released a platform-agnostic [driver for the Si4703][si4703-driver] FM radio turner (receiver) and published a [blog post][si4703-blog-post] including a picture of an example setup.
+
 [@andre-richter]: https://github.com/andre-richter
 [`qemu-exit`]: https://crates.io/crates/qemu-exit
 
+[@eldruin]: https://github.com/eldruin
+[si4703-driver]: https://crates.io/crates/si4703
+[si4703-blog-post]: https://blog.eldruin.com/si4703-fm-radio-receiver-driver-in-rust/
+
 If you have an embedded project or blog post you would like to have featured in the Embedded WG Newsletter, make sure to add it to [the next newsletter], we would love to show it off!
 
 ## `embedded-hal` Ecosystem Crates