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@@ -87,11 +87,11 @@ The easiest way to do this is via the "raspi-config" file/command. You can acces
 
 The light-meter is a custom addition to the Raspberry Pi which is built using the Pi's general-purpose input and output (G.P.I.O.) pins. You can see the layout of the components connected to the Pi in the diagram below.
 
-![hardware-layout](attachments/hardware-layout.jpg)
+![hardware-layout](attachments/hardware-layout.png)
 
 Depending on the type of enclosure you use, you might find it more convenient to have the actual light-meter (component) connected to the breadboard with a pair of jumper wires. To help explain the point, please see the image below.
 
-![light-meter-extension](attachments/light-meter-extension.jpg)
+![light-meter-extension](attachments/light-meter-extension.png)
 
 #### Power Supply
 
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