Replace the schematic block with more precise one

The previous client schematic block diagram was created
in LibreOffice Draw and wasn't detailed/exact/precise enough.
This one is created in DipTrace Scematic to provide access
to the scientific symbols.

analytical.tex

@@ -85,14 +85,18 @@ The measuring devices, from now on called \textbf{client nodes}, will consist of
 \subsection{Hardware components breakdown}
 For the \textbf{server node}, a complete working solution already exists, ready to be employed. The \textbf{GL.inet board}, described in more detail in the chapter \ref{s:glinet}, is greatly sufficient in all required aspects, and thus should be used for this purpose. 
 
+
 Luckily, a particular part of the required functionality for the client is already integrated as a \textbf{ESP-8266 module}, described in more detail in the chapter \ref{s:esp8266}. The module contains the \gls{tcpip} stack, micro-controller (application processor) running the user program, \gls{wlan} and light indication, all in one piece, so this greatly simplifies the design process and allows for more focus on the actual measurement circuitry. The actual ESP-12E module should be used, because of the available certification\cite{online:2ADUIESP-12}, which allows it to be introduced on the market later. It was shown in the figure \ref{f:esp-12e}. The \gls{pwm} is present there too, so sound indication requires just an additional sound emitting device.
 
 Talking about the measurement circuitry, the viable candidate is MAX78615 \cite{online:MAX78615} with the companion \gls{ic} MAX78700 \cite{online:MAX78700}. The couple \ref{f:schem_block} should be used, because it provides multiple ways of same voltage level communication with the processor, galvanic isolation via the pulse transformer for improved circuitry protection, great precision, accuracy and utility. The shunt resistor is utilised as a way of obtaining measurements, described in the sub-chapter \ref{ss:pmic}.
 
+Luckily, a particular part of the required functionality for the client node (displayed as a simplified schematic in \ref{f:schem_block}) is already integrated as a \textbf{ESP-8266 module}, described in more detail in the chapter \ref{s:esp8266}. The module contains the \gls{tcpip} stack, micro-controller (application processor) running the user program, \gls{wlan} and light indication, all in one piece, so this greatly simplifies the design process and allows for more focus on the actual measurement circuitry. The actual ESP-12E module has been chosen, because of the available certification\cite{online:2ADUIESP-12}, which allows it to be introduced on the market later. It was already shown in the figure \ref{f:esp-12e}. The \gls{pwm} is present there too, so sound indication requires just a sound emitting device.
+
+
 \begin{figure}[ht!]
 \centering
-\includegraphics[width=.7\textwidth,angle=0]{schematic_block}
-\caption{The proposed block diagram of a schematic of a \textit{client node} focusing on measuring part of the circuit}\label{f:schem_block}
+\includegraphics[width=1\textwidth,angle=0]{schematic_block}
+\caption{Greatly simplified schematic of a \textit{client node} sketching the inner working}\label{f:schem_block}
 \end{figure}
 
 For the protection against fire a standard electric fuse or a resettable \gls{ptc} fuse\cite{wright2004electric} should be used. The circuit protection against high voltage should be solved with an isolated DC-to-DC converter\cite{carr1996linear} or with the linear transformer coupled with the linear voltage regulator\cite{2008linear}. Since the former one is either expensive or hard to design, the choice should fall on the latter.