Updated the README.

README.md

@@ -1,10 +1,21 @@
 ![UppSense](http://uppsense.eu/wp-content/uploads/2017/07/cropped-logo-final-version.png)
 
-UppSense- Open Source sensor for chemical analysis based on fuoresence consisting of hardware and software. 
+UppSense17- Open Source sensor for chemical analysis based on fuoresence.
+ 
 ## Hardware
 ![Hardware Block Diagram](http://uppsense.eu/github_pics/block_smaller.png)
-The hardware consists out of three PCBs so far: An analog PCB, a digital PCB and an active Backplane. Two PCBs are developed with KiCAD. One is developed with Altium. 
+
+The hardware consists out of three PCBs so far: An analog PCB, a digital PCB and an active Backplane. Two PCBs are developed with KiCAD. One is developed with Altium.
+
+A transimpedance amplifier is used to convert light into a voltage. With a
+second stage this voltage is amplified. Both outputs are available for the ADC. 
+
+On the digital board there is besides an ESP8266, an ADC, an DAC and a temperature
+sensor. The DAC is needed to steer the LED driver circuit, that excites the
+sample. 
+ 
 ## Software
+The software is written in C++ leveraging the [Sming](https://github.com/SmingHub/Sming) framework.
+
 ## Web & Contact
-Website: www.uppsense.eu
-Email: contact@uppsense.eu
+Website: www.uppsense.eu | Email: contact@uppsense.eu