add some newlines to ecg instructions

en/ecg_kit_assembly.md

@@ -4,22 +4,28 @@ title: ECG kit assembly
 
 ### How-To wire and solder an ECG-Cable for the Card10 badge
 
-Cut off USB-A connector as we don't have use for it
+Stick some insulating tape over the ECG contacts at the bottom of your wristband, since we are replacing this contact area with one of the electrodes.
+
+Cut off the USB-A connector as we don't have use for it
+
 <img class="center" alt="cut usb wire" src="/media/ecg/1-cut-wire.jpg"  width="300" height="auto" align="center">
 
 Slide the big shrinking tube over the USB cable
 
 Separate the wires as shown in the picture
+
 <img class="center" alt="usb wire meanings" src="/media/ecg/wire-meanings.jpg"  width="300" height="auto" align="center">
 
 
 Cut off all wires ecxept for orange and purple
+
 <img class="center" alt="cut off unused wires" src="/media/ecg/cut-off-wires.jpg"  width="300" height="auto" align="center">
 
 
 Move the two small shrinking tubes over the ECG wires
 
 Solder the ECG wires to the USB wires as shown in the pictures
+
 <img class="center" alt="solder ecg usb wires" src="/media/ecg/3-solder.jpg"  width="300" height="auto" align="center">
 
 
@@ -27,6 +33,7 @@ Solder the ECG wires to the USB wires as shown in the pictures
 Test your ECG setup on your Card10 prior the next step
 
 Slide the small shrinking tubes over the soldering connections and apply hot air (e.g. lighter)
+
 <img class="center" alt="apply small heat shrink tubes" src="/media/ecg/4-add-heat-shrink.jpg"  width="300" height="auto" align="center">
 
 <img class="center" alt="shrink small heat shrink tubes" src="/media/ecg/5-shrik-this.jpg"  width="300" height="auto" align="center">
@@ -34,15 +41,18 @@ Slide the small shrinking tubes over the soldering connections and apply hot air
 
 
 Slide the bigger shrinking tube over the two small ones and also shrink it
+
 <img class="center" alt="apply large heat shrink tube" src="/media/ecg/large-heat-shrink.jpg"  width="300" height="auto" align="center">
 
 
 Have fun and hack ECG stuff
+
 <img class="center" alt="ecg fertig" src="/media/ecg/fertig.jpg"  width="300" height="auto" align="center">
 
 
 
 ### Usage
+
 <img class="center" alt="ecg usage" src="/media/ecg/application.jpg"  width="300" height="auto" align="center">