Update README.md

diff --git a/README.md b/README.md
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+++ b/README.md
@@ -5,18 +5,29 @@ This a constant WIP of an MCU's motherboard .
 
 MCU: STM32G431KBU3
 all ports exposed.
+
+https://www.st.com/en/microcontrollers-microprocessors/stm32g431kb.html
+
+
 +RS232 via the ST232BDR from STM too .
 
+https://www.st.com/en/interfaces-and-transceivers/st232b.html
+
+
 interactions: Led outpouts and Pin inputs.
 
 PWR: from usb and pins.
 
+https://www.st.com/en/power-management/l78l.html
+
+
+
 silicone as SMD .
 passive as THT .
 
-Board is made with the possibility to be made at "home" : Almost only one layer :) and no Vias .
+Board is made with the possibility to be made at "home" : Almost only one layer :) and no Vias !
 
-RST and Cristal included :)
+RST button and Cristal included :)
 
 plus the pull-up resistors for the I2C (activated with jumpers).
 
@@ -25,7 +36,5 @@ The project is made on Kicad , the , OpenSource solution for PCB and electronics
 
 https://www.kicad.org/
 
-https://www.st.com/en/microcontrollers-microprocessors/stm32g431kb.html
-
 
 Enjoy !!
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