Adds new article stub, adds links to nrf52.

website/articles/2021-03-13 black magic.md

@@ -0,0 +1,4 @@
+# Creating your own JTAG debugger
+
+Black Magic Probe:
+https://paramaggarwal.medium.com/converting-an-stm32f103-board-to-a-black-magic-probe-c013cf2cc38c

website/tutorials/03-nrf52.md

@@ -1,2 +1,9 @@
 # Getting started with NRF52
 
+Used hardware: nRF52840 Dongle
+
+https://www.nordicsemi.com/Software-and-tools/Development-Kits/nRF52840-Dongle/GetStarted
+
+https://www.nordicsemi.com/Software-and-Tools/Development-Tools/nRF-Connect-for-desktop
+
+https://infocenter.nordicsemi.com/index.jsp?topic=%2Fug_nc_programmer%2FUG%2Fnrf_connect_programmer%2Fncp_programming_dongle.html