Update readme.md

tools/pcb-nokia5110/readme.md

@@ -6,8 +6,8 @@ attached zip was created with easyeda. You can order easyly on jlcpcb.com.
 
 Attention: Be sure you have the right type of nokia-display-pcb !
 Check pin-header-description (There are different versions avail)!
-( check picture )
-PIN1: VCC
-![img](https://github.com/gh-fx2/ahoy/tree/nokia5110/tools/pcb-nokia5110/Nokia5110-LCD.jpg)
+( check picture : LIGHT (or BL) is placed between GND and VCC )
 
-You can use this PCB also without mounting a Nokia-display on backside !
+![img](https://github.com/gh-fx2/ahoy/tools/nokia5110/tools/pcb-nokia5110/Nokia5110-LCD.jpg)
+
+You can use this PCB also without mounting a Nokia-display on backside !