update 20180517 2100

tikz/mon48i.tex

@@ -0,0 +1,39 @@
+\documentclass[]{standalone}
+\input{./tikzpreamble}
+
+\begin{document}
+\begin{circuitikz}[scale=2]
+    \draw[color=black, thick]
+    (1,0) 
+    to [R, text width=1cm, l={R 500$\mu$},f>^=I$_{IN}$,  *-] (1,6)
+    to [short, -o](0,6) node[left] {V$_{IN} = -48V$}
+
+    (1,5.1) node[draw=black, fill=white, regular polygon, regular polygon sides=4] {PowerIt}
+
+    (0,0) node[left]{GND$_{V_{IN}}$} to [short, o-] (1,0)
+
+    (2.1,3) node[fd op amp] (fdoa) {}
+    (fdoa.+) to [short,-*] (1,2)
+    (fdoa.-) to [short,-*] (1,4)
+    (fdoa.down) to (2.06,0)
+    (fdoa.down)+(-.2,-.1) 
+        to (1.86,0)
+        to [short, -*](1,0)
+    (fdoa.up) 
+        to (2.06,6)
+        to [short,-o](6,6) node[right] {$V_{SS} = 3.3V$}
+    (fdoa.up)+(-.2,.1)
+        to (1.86,6)
+        to [short, -*] (2.06,6)
+    
+    (4,3) node[op amp] (oa) {}
+    (fdoa.out -) to (oa.-)
+    (fdoa.out +) to (oa.+)
+
+    (2.06,0) to [short,-o] (6,0) node[right]{GND}
+    (5,0) node[ground]{} node[circ](4.5,0){}
+
+    (oa.out) to [short,-] (5.5,3) node[right,draw=black] {MONITOR\_48I}
+    ; 
+\end{circuitikz}
+\end{document}

tikz/mon48v.tex

@@ -4,12 +4,12 @@
 \begin{document}
 \begin{circuitikz}[scale=2]
     \draw[color=black, thick]
-    (0,0) node[left]{$V_{SS}=-48V$}
+    (-1,0) node[left]{$V_{IN}=-48V$}
         to [short,o-*] (1.5,0){} % Baseline for connection to ground
     (1,0) 
         to [R, text width=1cm, l={R? 240k}, *-] (1,3)
         to [R, text width=1cm, l={R? 1k}, *-] (1,6)
-        (0,6) to [short, o-] (1,6)
+        (-1,6) node[left]{$GND_{V_{IN}}$} to [short, o-] (1,6)
 
     (2.1,3) node[fd op amp] (fdoa) {}
     (fdoa.+) to (1,3)
@@ -21,7 +21,7 @@
         to [short, -*](.1,6)
     (fdoa.up) 
         to (2.06,6)
-        to (5,6)
+        to [short,-o](6,6) node[right] {$V_{SS} = 3.3V$}
     (fdoa.up)+(-.2,.1)
         to +(-.2,1)
         to [short, -*] +(0,1)
@@ -32,12 +32,8 @@
 
     (2.06,0) to [short,-o] (6,0) node[right]{GND}
     (5,0) node[ground]{} node[circ](4.5,0){}
-    (5,0) 
-        to [R, text width=1cm, l=$R20$ 1k] (5,3)
-        to [R, l=$R21$, *-*] (5,6)
-        to [short, -o](6,6) node[right]{$V_{DD}=3.3 V$}
 
-    % Mosfet Transistors
+    (oa.out) to [short,-] (6,3) node[right,draw=black] {MONITOR\_48V}
     ; 
 \end{circuitikz}
 \end{document}

tikz/tikzpreamble.tex

@@ -1,5 +1,5 @@
 \usepackage{tikz}
-\usetikzlibrary{positioning, shapes, arrows}
+\usetikzlibrary{positioning, shapes, arrows, shapes.geometric}
 \usepackage[siunitx]{circuitikz}
 \usepackage[utf8]{inputenc}
 %\usepackage{cm}