diff --git a/README.md b/README.md
index 95f2a99..077a447 100644
--- a/README.md
+++ b/README.md
@@ -134,6 +134,7 @@ PlatformIO is a cross-platform, cross-architecture, multiple framework, professi
 #### PCB Design
 
 - [Create PCBs for Rapid Prototyping](https://www.youtube.com/playlist?list=PLEBQazB0HUyRVK1RpHIjyjuTxn5srz6XM)
+- [How to Make a Raspberry Pi Compute Module 4 Carrier Board](https://www.youtube.com/playlist?list=PLEBQazB0HUyRwjr761b-MLNEu8FA8WKSG)
 - [How To Learn PCB Design (My Thoughts, Journey, and Resources) - Phil's Lab #87](https://youtu.be/aODkA2mrimQ)
 - [KiCad 6 STM32 PCB Design Full Tutorial - Phil's Lab #65](https://youtu.be/aVUqaB0IMh4)
 - [Intro to KiCad](https://www.youtube.com/watch?v=vaCVh2SAZY4&list=PLEBQazB0HUyR24ckSZ5u05TZHV9khgA1O)
@@ -256,6 +257,7 @@ PlatformIO is a cross-platform, cross-architecture, multiple framework, professi
 - [Make: AVR Programming - Elliot Williams](https://www.oreilly.com/library/view/make-avr-programming/9781449356484/)
 - [Mastering STM32 - Carmine Noviello](https://leanpub.com/mastering-stm32-2nd)
 - [Getting Started with STM32 and Nucleo](https://youtube.com/playlist?list=PLEBQazB0HUyRYuzfi4clXsKUSgorErmBv)
+- [Intro to Raspberry Pi Pico and RP2040](https://www.youtube.com/playlist?list=PLEBQazB0HUyQO6rJxKr2umPCgmfAU-cqR)
 - [Udemy – Microcontroller Embedded C Programming: Absolute Beginners](https://www.udemy.com/course/microcontroller-embedded-c-programming/)
 - [Udemy – Embedded Systems STM32 Low-Layer APIs(LL) Driver Development](https://www.udemy.com/course/embedded-systems-stm32-low-level-ll-driver-development/)
 - [Udemy – Embedded Systems STM32 HAL APIs Driver Development](https://www.udemy.com/course/embedded-systems-stm32-hal-apis-driver-development/)
@@ -524,6 +526,7 @@ PlatformIO is a cross-platform, cross-architecture, multiple framework, professi
 #### Unit Testing
 
 - [Embedded C/C++ Unit Testing with Mocks](https://interrupt.memfault.com/blog/unit-test-mocking)
+- [Unit Testing Principles, Practices, and Patterns - Vladimir Khorikov](https://www.manning.com/books/unit-testing)
 
 #### Integration Testing