Pcb calculator: add track width versus current and electrical spacing versus...

Pcb calculator: add track width versus current and electrical spacing versus voltage tools (from IPC 2221)

pcb_calculator/CMakeLists.txt

@@ -8,11 +8,13 @@ include_directories(${CMAKE_CURRENT_SOURCE_DIR}
 set(PCB_CALCULATOR_SRCS
     attenuators.cpp
     board_classes_values.cpp
-    pcb_calculator.cpp
-    pcb_calculator_frame.cpp
     colorcode.cpp
+    electrical_spacing_values.cpp
     params_read_write.cpp
+    pcb_calculator.cpp
+    pcb_calculator_frame.cpp
     regulators_funct.cpp
+    tracks_width_versus_current.cpp
     transline_ident.cpp
     UnitSelector.cpp
     transline/transline.cpp
@@ -24,8 +26,8 @@ set(PCB_CALCULATOR_SRCS
     transline/stripline.cpp
     transline/twistedpair.cpp
     transline_dlg_funct.cpp
-    dialogs/pcb_calculator_frame_base.cpp
     attenuators/attenuator_classes.cpp
+    dialogs/pcb_calculator_frame_base.cpp
     )
 
 if(WIN32)

pcb_calculator/UnitSelector.h

@@ -27,6 +27,11 @@ public:
      * to normalized units (meter, herz, ohm, radian )
      */
     virtual double GetUnitScale() = 0;
+
+    wxString GetUnitName()
+    {
+        return GetStringSelection();
+    }
 };
 
 class UNIT_SELECTOR_LEN: public UNIT_SELECTOR

pcb_calculator/attenuators.cpp

@@ -78,18 +78,18 @@ void PCB_CALCULATOR_FRAME::TransfAttenuatorDataToPanel()
 {
     wxString msg;
 
-    msg.Printf( wxT( "%f" ), m_currAttenuator->m_Attenuation );
+    msg.Printf( wxT( "%g" ), m_currAttenuator->m_Attenuation );
     m_AttValueCtrl->SetValue( msg );
     m_AttValueCtrl->Enable( m_currAttenuator->m_Attenuation_Enable );
 
     m_ZinValueCtrl->Enable( m_currAttenuator->m_Zin_Enable );
     if( m_currAttenuator->m_Zin_Enable )
-        msg.Printf( wxT( "%f" ), m_currAttenuator->m_Zin );
+        msg.Printf( wxT( "%g" ), m_currAttenuator->m_Zin );
     else
         msg.Clear();;
     m_ZinValueCtrl->SetValue( msg );
 
-    msg.Printf( wxT( "%f" ), m_currAttenuator->m_Zout );
+    msg.Printf( wxT( "%g" ), m_currAttenuator->m_Zout );
     m_ZoutValueCtrl->SetValue( msg );
 }
 
@@ -114,15 +114,15 @@ void PCB_CALCULATOR_FRAME::TransfAttenuatorResultsToPanel()
         return;
     }
 
-    msg.Printf( wxT( "%f" ), m_currAttenuator->m_R1 );
+    msg.Printf( wxT( "%g" ), m_currAttenuator->m_R1 );
     m_Att_R1_Value->SetValue( msg );
-    msg.Printf( wxT( "%f" ), m_currAttenuator->m_R2 );
+    msg.Printf( wxT( "%g" ), m_currAttenuator->m_R2 );
     m_Att_R2_Value->SetValue( msg );
     if( m_currAttenuator->m_ResultCount  < 3 )
         m_Att_R3_Value->SetValue( wxEmptyString );
     else
     {
-        msg.Printf( wxT( "%f" ), m_currAttenuator->m_R3 );
+        msg.Printf( wxT( "%g" ), m_currAttenuator->m_R3 );
         m_Att_R3_Value->SetValue( msg );
     }
 }

pcb_calculator/board_classes_values.cpp

@@ -98,41 +98,43 @@ void PCB_CALCULATOR_FRAME::OnBoardClassesUnitsSelection( wxCommandEvent& event )
 void PCB_CALCULATOR_FRAME::BoardClassesUpdateData( double aUnitScale )
 {
     wxString txt;
+    #define FMT wxT("%g")
+    #define NOVAL wxT("--")
     for( int ii = 0; ii < BRDCLASS_COUNT; ii ++ )
     {
         // Display min tracks width
         if( clist[ii].m_Lines > -1.0 )
-            txt.Printf( wxT("%f"), clist[ii].m_Lines / aUnitScale);
+            txt.Printf( FMT, clist[ii].m_Lines / aUnitScale);
         else
-            txt = wxT("--");
+            txt = NOVAL;
         m_gridClassesValuesDisplay->SetCellValue(0, ii, txt );
 
         // Display min clearance
         if( clist[ii].m_Clearance > -1.0 )
-            txt.Printf( wxT("%f"), clist[ii].m_Clearance / aUnitScale);
+            txt.Printf( FMT, clist[ii].m_Clearance / aUnitScale);
         else
-            txt = wxT("--");
+            txt = NOVAL;
         m_gridClassesValuesDisplay->SetCellValue(1, ii, txt );
 
         // Display min Via diam diff
         if( clist[ii].m_ViaDiamDiff > -1.0 )
-            txt.Printf( wxT("%f"), clist[ii].m_ViaDiamDiff / aUnitScale);
+            txt.Printf( FMT, clist[ii].m_ViaDiamDiff / aUnitScale);
         else
-            txt = wxT("--");
+            txt = NOVAL;
         m_gridClassesValuesDisplay->SetCellValue(2, ii, txt );
 
         // Display min Pad diam diff (plated)
         if( clist[ii].m_PadDiamDiffPlated > -1.0 )
-            txt.Printf( wxT("%f"), clist[ii].m_PadDiamDiffPlated / aUnitScale);
+            txt.Printf( FMT, clist[ii].m_PadDiamDiffPlated / aUnitScale);
         else
-            txt = wxT("--");
+            txt = NOVAL;
         m_gridClassesValuesDisplay->SetCellValue(3, ii, txt );
 
         // Display min Pad diam diff (non plated)
         if( clist[ii].m_PadDiamDiffNotPlated > -1.0 )
-            txt.Printf( wxT("%f"), clist[ii].m_PadDiamDiffNotPlated / aUnitScale);
+            txt.Printf( FMT, clist[ii].m_PadDiamDiffNotPlated / aUnitScale);
         else
-            txt = wxT("--");
+            txt = NOVAL;
         m_gridClassesValuesDisplay->SetCellValue(4, ii, txt );
     }
 }

pcb_calculator/dialogs/pcb_calculator_frame_base.h

@@ -33,11 +33,12 @@ class UNIT_SELECTOR_RESISTOR;
 #include <wx/textctrl.h>
 #include <wx/button.h>
 #include <wx/panel.h>
-#include <wx/radiobox.h>
-#include <wx/statline.h>
 #include <wx/choice.h>
+#include <wx/html/htmlwin.h>
 #include <wx/statbox.h>
+#include <wx/statline.h>
 #include <wx/grid.h>
+#include <wx/radiobox.h>
 #include <wx/notebook.h>
 #include <wx/frame.h>
 
@@ -75,6 +76,61 @@ class PCB_CALCULATOR_FRAME_BASE : public wxFrame
 		wxStaticText* m_unitsVout;
 		wxButton* m_buttonCalculate;
 		wxStaticText* m_RegulMessage;
+		wxPanel* m_panelTrackWidth;
+		wxStaticText* m_staticTextTW_WarningMessage;
+		wxStaticText* m_staticTextCurrent;
+		wxTextCtrl* m_TrackCurrentValue;
+		wxStaticText* m_staticText62;
+		wxStaticText* m_staticText63;
+		wxTextCtrl* m_TrackDeltaTValue;
+		wxStaticText* m_staticText64;
+		wxStaticText* m_staticText65;
+		wxTextCtrl* m_TrackThicknessValue;
+		UNIT_SELECTOR_LEN* m_TW_CuThickness_choiceUnit;
+		wxStaticText* m_staticText66;
+		wxTextCtrl* m_TrackLengthValue;
+		UNIT_SELECTOR_LEN* m_TW_CuLength_choiceUnit;
+		wxHtmlWindow* m_htmlWinFormulas;
+		wxButton* m_buttonTW;
+		wxStaticText* m_staticTextWidth;
+		wxTextCtrl* m_ExtTrackWidthValue;
+		UNIT_SELECTOR_LEN* m_TW_ExtTrackWidth_choiceUnit;
+		wxStaticText* m_staticTextArea;
+		wxTextCtrl* m_ExtTrackAreaValue;
+		wxStaticText* m_ExtTrackAreaUnitLabel;
+		wxStaticText* m_staticText651;
+		wxTextCtrl* m_ExtTrackResistValue;
+		wxStaticText* m_staticText84;
+		wxStaticText* m_staticText661;
+		wxTextCtrl* m_ExtTrackVDropValue;
+		wxStaticText* m_staticText83;
+		wxStaticText* m_staticText79;
+		wxTextCtrl* m_ExtTrackLossValue;
+		wxStaticText* m_staticText791;
+		wxStaticText* m_staticTextWidth11;
+		wxTextCtrl* m_IntTrackWidthValue;
+		UNIT_SELECTOR_LEN* m_TW_IntTrackWidth_choiceUnit;
+		wxStaticText* m_staticTextArea1;
+		wxTextCtrl* m_IntTrackAreaValue;
+		wxStaticText* m_IntTrackAreaUnitLabel;
+		wxStaticText* m_staticText6511;
+		wxTextCtrl* m_IntTrackResistValue;
+		wxStaticText* m_staticText841;
+		wxStaticText* m_staticText6611;
+		wxTextCtrl* m_IntTrackVDropValue;
+		wxStaticText* m_staticText831;
+		wxStaticText* m_staticText792;
+		wxTextCtrl* m_IntTrackLossValue;
+		wxStaticText* m_staticText7911;
+		wxPanel* m_panelElectricalSpacing;
+		UNIT_SELECTOR_LEN* m_ElectricalSpacingUnitsSelector;
+		wxStaticLine* m_staticline2;
+		wxStaticText* m_staticText891;
+		wxTextCtrl* m_ElectricalSpacingVoltage;
+		wxButton* m_buttonElectSpacingRefresh;
+		wxStaticText* m_staticTextElectricalSpacing;
+		wxGrid* m_gridElectricalSpacingValues;
+		wxStaticText* m_staticText88;
 		wxPanel* m_panelTransline;
 		wxRadioBox* m_TranslineSelection;
 		wxPanel* m_panelDisplayshape;
@@ -195,6 +251,9 @@ class PCB_CALCULATOR_FRAME_BASE : public wxFrame
 		
 		// Virtual event handlers, overide them in your derived class
 		virtual void OnRegulatorCalcButtonClick( wxCommandEvent& event ) { event.Skip(); }
+		virtual void OnTWCalculateButt( wxCommandEvent& event ) { event.Skip(); }
+		virtual void OnElectricalSpacingUnitsSelection( wxCommandEvent& event ) { event.Skip(); }
+		virtual void OnElectricalSpacingRefresh( wxCommandEvent& event ) { event.Skip(); }
 		virtual void OnTranslineSelection( wxCommandEvent& event ) { event.Skip(); }
 		virtual void OnPaintTranslinePanel( wxPaintEvent& event ) { event.Skip(); }
 		virtual void OnTranslineEpsilonR_Button( wxCommandEvent& event ) { event.Skip(); }
@@ -212,7 +271,7 @@ class PCB_CALCULATOR_FRAME_BASE : public wxFrame
 	
 	public:
 		
-		PCB_CALCULATOR_FRAME_BASE( wxWindow* parent, wxWindowID id = wxID_ANY, const wxString& title = _("Pcb Calculator"), const wxPoint& pos = wxDefaultPosition, const wxSize& size = wxSize( 752,465 ), long style = wxDEFAULT_FRAME_STYLE|wxRESIZE_BORDER|wxFULL_REPAINT_ON_RESIZE|wxTAB_TRAVERSAL );
+		PCB_CALCULATOR_FRAME_BASE( wxWindow* parent, wxWindowID id = wxID_ANY, const wxString& title = _("Pcb Calculator"), const wxPoint& pos = wxDefaultPosition, const wxSize& size = wxSize( 670,465 ), long style = wxDEFAULT_FRAME_STYLE|wxRESIZE_BORDER|wxFULL_REPAINT_ON_RESIZE|wxTAB_TRAVERSAL );
 		
 		~PCB_CALCULATOR_FRAME_BASE();
 	

pcb_calculator/electrical_spacing_values.cpp

+/*
+ * This program source code file is part of KICAD, a free EDA CAD application.
+ *
+ * Copyright (C) 2011 jean-pierre.charras
+ * Copyright (C) 2011 Kicad Developers, see change_log.txt for contributors.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you may find one here:
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * or you may search the http://www.gnu.org website for the version 2 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+#include <wx/app.h>
+#include <wx/config.h>
+
+#include "pcb_calculator_frame_base.h"
+#include "pcb_calculator.h"
+#include "UnitSelector.h"
+#include "units_scales.h"
+
+extern double ReturnDoubleFromString( const wxString& TextValue );
+
+
+#define VALUE_COUNT 7
+#define CLASS_COUNT 10
+
+/* These values come from IPC2221
+ *  there are 10 voltage classes:
+ *  "0 ... 15V" "16 ... 30V" "31 ... 50V" "51 ... 100V"
+ *  "101 ... 150V" "151 ... 170V" "171 ... 250V"
+ *  "251 ... 300V" "301 ... 500V" " > 500V"
+ *  and for each voltage class
+ *  there ar e 7 cases:
+ *  "B1" "B2" "B3" "B4" "A5" "A6" "A7"
+ *  B1 - Internal Conductors
+ *  B2 - External Conductors, uncoated, sea level to 3050 m
+ *  B3 - External Conductors, uncoated, over 3050 m
+ *  B4 - External Conductors, with permanent polymer coating (any elevation)
+ *  A5 - External Conductors, with conformal coating over assembly (any elevation)
+ *  A6 - External Component lead/termination, uncoated
+ *  A7 - External Component lead termination, with conformal coating (any elevation)
+ */
+
+/* For voltages greater than 500V, the (per volt) table values
+ *  must be added to the 500V values. For example, the elec-
+ *  trical spacing for a Type B1 board with 600V is calculated
+ *  as:
+ *  600V - 500V = 100V
+ *  0.25 mm + (100V x 0.0025
+ */
+static double clist[CLASS_COUNT][VALUE_COUNT] =
+{
+    { 0.05 * UNIT_MM, 0.1 * UNIT_MM,   0.1 * UNIT_MM,   0.05 * UNIT_MM,  0.13 * UNIT_MM, 0.13 *
+      UNIT_MM,
+      0.13 * UNIT_MM }, // 0 ... 15V
+
+    { 0.05 * UNIT_MM, 0.1 * UNIT_MM,  0.1 * UNIT_MM,  0.05 * UNIT_MM, 0.13 * UNIT_MM, 0.25 *
+      UNIT_MM,
+      0.13 * UNIT_MM }, // 16 ... 30V
+
+    { 0.1 * UNIT_MM,  0.6 * UNIT_MM,  0.6 * UNIT_MM,  0.13 * UNIT_MM, 0.13 * UNIT_MM, 0.4 *
+      UNIT_MM,
+      0.13 * UNIT_MM }, // 31 ... 50V
+
+    { 0.1 * UNIT_MM,  0.6 * UNIT_MM,  1.5 * UNIT_MM,  0.13 * UNIT_MM, 0.13 * UNIT_MM, 0.5 *
+      UNIT_MM,
+      0.13 * UNIT_MM }, // 51 ... 100V
+
+    { 0.2 * UNIT_MM,  0.6 * UNIT_MM,  3.2 * UNIT_MM,  0.4 * UNIT_MM,  0.4 * UNIT_MM,  0.8 *
+      UNIT_MM,
+      0.4 * UNIT_MM }, // 101 ... 150V
+
+    { 0.2 * UNIT_MM,  1.25 * UNIT_MM, 3.2 * UNIT_MM,  0.4 * UNIT_MM,  0.4 * UNIT_MM,  0.8 *
+      UNIT_MM,
+      0.4 * UNIT_MM }, // 151 ... 170V
+
+    { 0.2 * UNIT_MM,  1.25 * UNIT_MM, 6.4 * UNIT_MM,  0.4 * UNIT_MM,  0.4 * UNIT_MM,  0.8 *
+      UNIT_MM,
+      0.4 * UNIT_MM }, // 171 ... 250V
+
+    { 0.2 * UNIT_MM,  1.25 * UNIT_MM, 12.5 * UNIT_MM, 0.4 * UNIT_MM,  0.4 * UNIT_MM,  0.8 *
+      UNIT_MM,
+      0.8 * UNIT_MM }, // 251 ... 300V
+
+    { 0.25 * UNIT_MM, 2.5 * UNIT_MM,  12.5 * UNIT_MM, 0.8 * UNIT_MM,  0.8 * UNIT_MM,  1.5 *
+      UNIT_MM,
+      0.8 * UNIT_MM }, // 301 ... 500V
+
+    // These last values are used to calculate spacing for voltage > 500V
+    // there are not the spacing
+    { 0.0025 * UNIT_MM, 0.005 * UNIT_MM,  0.025 * UNIT_MM, 0.00305 * UNIT_MM,
+        0.00305 * UNIT_MM,  0.00305 * UNIT_MM, 0.00305 * UNIT_MM }, // > 500V
+};
+
+
+void PCB_CALCULATOR_FRAME::OnElectricalSpacingUnitsSelection( wxCommandEvent& event )
+{
+    ElectricalSpacingUpdateData( m_ElectricalSpacingUnitsSelector->GetUnitScale() );
+}
+
+void PCB_CALCULATOR_FRAME::OnElectricalSpacingRefresh( wxCommandEvent& event )
+{
+    ElectricalSpacingUpdateData( m_ElectricalSpacingUnitsSelector->GetUnitScale() );
+}
+
+
+void PCB_CALCULATOR_FRAME::ElectricalSpacingUpdateData( double aUnitScale )
+{
+    wxString txt;
+    double voltage = 500.0;     // to calculate values at V > 500V
+    txt = m_ElectricalSpacingVoltage->GetValue();
+    if( ! txt.IsEmpty() )
+        voltage = ReturnDoubleFromString(txt);
+    if( voltage < 500.0 )
+        voltage = 500.0;
+    txt.Printf( wxT( "%g" ), voltage );
+    m_ElectricalSpacingVoltage->SetValue( txt );
+
+    for( int ii = 0; ii < CLASS_COUNT-1; ii++ )
+    {
+        for( int jj = 0; jj < VALUE_COUNT; jj++ )
+        {
+            txt.Printf( wxT( "%g" ), clist[ii][jj] / aUnitScale );
+            m_gridElectricalSpacingValues->SetCellValue( ii, jj, txt );
+        }
+    }
+
+    for( int jj = 0; jj < VALUE_COUNT; jj++ )
+    {
+        double spacing = clist[CLASS_COUNT-2][jj];
+        double spacing_extra = clist[CLASS_COUNT-1][jj];
+        spacing += spacing_extra * ( voltage - 500.0 );
+        txt.Printf( wxT( "%g" ), spacing / aUnitScale );
+        m_gridElectricalSpacingValues->SetCellValue( CLASS_COUNT-1, jj, txt );
+    }
+}

pcb_calculator/pcb_calculator.h

@@ -46,6 +46,37 @@ private:
     void ReadConfig();
     void WriteConfig();
 
+    // tracks width versus current functions:
+    /**
+     * Function OnTWCalculateButt
+     * Called by clicking on the calculate button
+     */
+    void OnTWCalculateButt( wxCommandEvent& event );
+
+    /**
+     * Function TW_Init
+     * Read config and init dialog widgets values
+     */
+    void TW_Init();
+
+    /**
+     * Function TW_WriteConfig
+     * Write Track width prameters in config
+     */
+    void TW_WriteConfig();
+
+    /**
+     * Function TWCalculate
+     * Performs track caracteristics values calculations.
+     */
+    double TWCalculate( double aCurrent, double aThickness, double aDeltaT_C,
+                    bool aUseInternalLayer );
+
+    // Electrical spacing panel:
+    void OnElectricalSpacingUnitsSelection( wxCommandEvent& event );
+    void OnElectricalSpacingRefresh( wxCommandEvent& event );
+    void ElectricalSpacingUpdateData( double aUnitScale );
+
     // Transline functions:
     /**
      * Function OnTranslineSelection

pcb_calculator/pcb_calculator_frame.cpp

@@ -38,6 +38,8 @@
 #define KEYWORD_COLORCODE_SELECTION           wxT( "CC_selection" )
 #define KEYWORD_ATTENUATORS_SELECTION         wxT( "Att_selection" )
 #define KEYWORD_BRDCLASS_SELECTION            wxT( "BrdClass_selection" )
+#define KEYWORD_ELECTRICAL_SPACING_SELECTION  wxT( "ElectSpacing_selection" )
+#define KEYWORD_ELECTRICAL_SPACING_VOLTAGE    wxT( "ElectSpacing_voltage" )
 #define KEYWORD_REGUL_R1            wxT( "RegulR1" )
 #define KEYWORD_REGUL_R2            wxT( "RegulR2" )
 #define KEYWORD_REGUL_VREF          wxT( "RegulVREF" )
@@ -73,12 +75,16 @@ PCB_CALCULATOR_FRAME::PCB_CALCULATOR_FRAME( wxWindow * parent ) :
     TranslineTypeSelection( m_currTransLineType );
     m_TranslineSelection->SetSelection( m_currTransLineType );
 
+    TW_Init();
+
     SetAttenuator( m_AttenuatorsSelection->GetSelection() );
 
     ToleranceSelection( m_rbToleranceSelection->GetSelection() );
 
     BoardClassesUpdateData( m_BoardClassesUnitsSelector->GetUnitScale() );
 
+    ElectricalSpacingUpdateData( m_ElectricalSpacingUnitsSelector->GetUnitScale() );
+
     #ifdef __WINDOWS__
     SetIcon( wxICON( pcb_calculator_icon ) );
     #else
@@ -142,6 +148,10 @@ void PCB_CALCULATOR_FRAME::ReadConfig()
     m_RegulVrefValue->SetValue( msg );
     m_Config->Read( KEYWORD_REGUL_VOUT, &msg, wxT("12") );
     m_RegulVoutValue->SetValue( msg );
+    m_Config->Read( KEYWORD_ELECTRICAL_SPACING_SELECTION, &ltmp, 0 );
+    m_ElectricalSpacingUnitsSelector->SetSelection( ltmp );
+    m_Config->Read( KEYWORD_ELECTRICAL_SPACING_VOLTAGE, &msg, wxT("500") );
+    m_ElectricalSpacingVoltage->SetValue( msg );
 
     for( unsigned ii = 0; ii < m_transline_list.size(); ii++ )
         m_transline_list[ii]->ReadConfig( m_Config );
@@ -174,6 +184,12 @@ void PCB_CALCULATOR_FRAME::WriteConfig()
     m_Config->Write( KEYWORD_REGUL_R2, m_RegulR2Value->GetValue() );
     m_Config->Write( KEYWORD_REGUL_VREF, m_RegulVrefValue->GetValue() );
     m_Config->Write( KEYWORD_REGUL_VOUT, m_RegulVoutValue->GetValue() );
+    m_Config->Write( KEYWORD_ELECTRICAL_SPACING_SELECTION,
+                     m_ElectricalSpacingUnitsSelector->GetSelection() );
+    m_Config->Write( KEYWORD_ELECTRICAL_SPACING_VOLTAGE,
+                     m_ElectricalSpacingVoltage->GetValue() );
+
+    TW_WriteConfig();
 
     for( unsigned ii = 0; ii < m_transline_list.size(); ii++ )
         m_transline_list[ii]->WriteConfig( m_Config );

pcb_calculator/regulators_funct.cpp

@@ -105,13 +105,13 @@ void PCB_CALCULATOR_FRAME::RegulatorsSolve()
             break;
     }
     // write values to panel:
-    txt.Printf(wxT("%f"), r1);
+    txt.Printf(wxT("%g"), r1);
     m_RegulR1Value->SetValue(txt);
-    txt.Printf(wxT("%f"), r2);
+    txt.Printf(wxT("%g"), r2);
     m_RegulR2Value->SetValue(txt);
-    txt.Printf(wxT("%f"), vref);
+    txt.Printf(wxT("%g"), vref);
     m_RegulVrefValue->SetValue(txt);
-    txt.Printf(wxT("%f"), vout);
+    txt.Printf(wxT("%g"), vout);
     m_RegulVoutValue->SetValue(txt);
 
 }

pcb_calculator/tracks_width_versus_current.cpp

+/*
+ * This program source code file is part of KICAD, a free EDA CAD application.
+ *
+ * Copyright (C) 2011 jean-pierre.charras
+ * Copyright (C) 1992-2011 Kicad Developers, see change_log.txt for contributors.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you may find one here:
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * or you may search the http://www.gnu.org website for the version 2 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+/* see
+ * http://www.desmith.net/NMdS/Electronics/TraceWidth.html
+ * http://www.ultracad.com/articles/pcbtemp.pdf
+ * for more info
+ */
+
+#include "wx/wx.h"
+#include "wx/config.h"
+
+#include "pcb_calculator_frame_base.h"
+
+#include "pcb_calculator.h"
+#include "UnitSelector.h"
+#include "units_scales.h"
+
+extern double ReturnDoubleFromString( const wxString& TextValue );
+
+// Key words to read/write some parameters in config:
+#define KEYWORD_TW_CURRENT                     wxT( "TW_Track_Current" )
+#define KEYWORD_TW_DELTA_TC                    wxT( "TW_Delta_TC" )
+#define KEYWORD_TW_TRACK_COPPER_THICKNESS      wxT( "TW_Track_CopperThickness" )
+#define KEYWORD_TW_TRACK_LEN                   wxT( "TW_Track_Len" )
+#define KEYWORD_TW_TRACK_COPPER_THICKNESS_UNIT wxT( "TW_Track_CopperThickness_Unit" )
+#define KEYWORD_TW_TRACK_LEN_UNIT              wxT( "TW_Track_Len_Unit" )
+#define KEYWORD_TW_EXTTRACK_WIDTH_UNIT         wxT( "TW_ExtTrack_Width_Unit" )
+#define KEYWORD_TW_INTTRACK_WIDTH_UNIT         wxT( "TW_IntTrack_Width_Unit" )
+
+void PCB_CALCULATOR_FRAME::TW_WriteConfig()
+{
+    // Save current parameters values in config:
+    m_Config->Write( KEYWORD_TW_EXTTRACK_WIDTH_UNIT, m_TW_ExtTrackWidth_choiceUnit->GetSelection() );
+    m_Config->Write( KEYWORD_TW_INTTRACK_WIDTH_UNIT, m_TW_IntTrackWidth_choiceUnit->GetSelection() );
+    m_Config->Write( KEYWORD_TW_TRACK_COPPER_THICKNESS_UNIT,
+                    m_TW_CuThickness_choiceUnit->GetSelection() );
+    m_Config->Write( KEYWORD_TW_TRACK_LEN_UNIT, m_TW_CuLength_choiceUnit->GetSelection() );
+    m_Config->Write( KEYWORD_TW_CURRENT, m_TrackCurrentValue->GetValue() );
+    m_Config->Write( KEYWORD_TW_DELTA_TC, m_TrackDeltaTValue->GetValue() );
+    m_Config->Write( KEYWORD_TW_TRACK_COPPER_THICKNESS, m_TrackThicknessValue->GetValue() );
+    m_Config->Write( KEYWORD_TW_TRACK_LEN, m_TrackLengthValue->GetValue() );
+}
+
+
+void PCB_CALCULATOR_FRAME::OnTWCalculateButt( wxCommandEvent& event )
+{
+    // Prepare parameters:
+    double current   = ReturnDoubleFromString( m_TrackCurrentValue->GetValue() );
+    double thickness = ReturnDoubleFromString( m_TrackThicknessValue->GetValue() );
+    double deltaT_C  = ReturnDoubleFromString( m_TrackDeltaTValue->GetValue() );
+    double track_len = ReturnDoubleFromString( m_TrackLengthValue->GetValue() );
+    double extTrackWidth;
+    double intTrackWidth;
+
+    // Normalize units:
+    thickness    *= m_TW_CuThickness_choiceUnit->GetUnitScale();
+    track_len    *= m_TW_CuLength_choiceUnit->GetUnitScale();
+    extTrackWidth = TWCalculate( current, thickness, deltaT_C, false );
+    intTrackWidth = TWCalculate( current, thickness, deltaT_C, true );
+
+    // Display values:
+    wxString msg;
+    msg.Printf( wxT( "%g" ), extTrackWidth / m_TW_ExtTrackWidth_choiceUnit->GetUnitScale() );
+    m_ExtTrackWidthValue->SetValue( msg );
+    msg.Printf( wxT( "%g" ), intTrackWidth / m_TW_IntTrackWidth_choiceUnit->GetUnitScale() );
+    m_IntTrackWidthValue->SetValue( msg );
+
+    // Display areas:
+    double   scale = m_TW_ExtTrackWidth_choiceUnit->GetUnitScale();
+    double   ext_area  = thickness * extTrackWidth;
+    msg.Printf( wxT( "%g" ), ext_area / (scale * scale) );
+    m_ExtTrackAreaValue->SetValue( msg );
+    wxString strunit = m_TW_ExtTrackWidth_choiceUnit->GetUnitName();
+    msg = strunit + wxT( " x " ) + strunit;
+    m_ExtTrackAreaUnitLabel->SetLabel( msg );
+    scale = m_TW_IntTrackWidth_choiceUnit->GetUnitScale();
+    double   int_area  = thickness * intTrackWidth;
+    msg.Printf( wxT( "%g" ), int_area / (scale * scale) );
+    m_IntTrackAreaValue->SetValue( msg );
+    strunit = m_TW_IntTrackWidth_choiceUnit->GetUnitName();
+    msg = strunit + wxT( " x " ) + strunit;
+    m_IntTrackAreaUnitLabel->SetLabel( msg );
+
+    // Display resistance (assuming using copper ):
+    double rho = 1.72e-008;     // In Ohms*meter
+    double ext_res = rho / ext_area * track_len;
+    msg.Printf( wxT( "%g" ), ext_res );
+    m_ExtTrackResistValue->SetValue( msg );
+    double int_res = rho / int_area * track_len;
+    msg.Printf( wxT( "%g" ), int_res );
+    m_IntTrackResistValue->SetValue( msg );
+
+    // Display drop voltage
+    double ext_drop_volt = ext_res * current;
+    msg.Printf( wxT( "%g" ), ext_drop_volt );
+    m_ExtTrackVDropValue->SetValue( msg );
+    double int_drop_volt = int_res * current;
+    msg.Printf( wxT( "%g" ), int_drop_volt );
+    m_IntTrackVDropValue->SetValue( msg );
+
+    // Display power loss
+    double loss = ext_drop_volt * current;
+    msg.Printf( wxT( "%g" ), loss );
+    m_ExtTrackLossValue->SetValue( msg );
+    loss = int_drop_volt * current;
+    msg.Printf( wxT( "%g" ), loss );
+    m_IntTrackLossValue->SetValue( msg );
+}
+
+
+/* calculate track width for external or internal layers
+ *
+ * Imax = 0.048 * dT^0.44 * A^0.725 for external layer
+ * Imax = 0.024 * dT^0.44 * A^0.725 for internal layer
+ * with A = area = aThickness * trackWidth ( in mils )
+ * and dT = temperature rise in degree C
+ * Of course we want to know trackWidth
+ */
+double PCB_CALCULATOR_FRAME::TWCalculate( double aCurrent, double aThickness, double aDeltaT_C,
+                                          bool aUseInternalLayer )
+{
+    double scale = 0.048;    // We are using normalize units (sizes in meters)
+
+    if( aUseInternalLayer )
+        scale *= 0.024 / 0.048;
+
+    // aThickness is given in normalize units (in meters) and we need mil
+    aThickness /= UNIT_MIL;
+
+    /* formula is Imax = scale * dT^0.44 * A^0.725
+     * or
+     * log(Imax) = log(scale) + 0.44*log(dT)
+     *      +(0.725*(log(aThickness) + log(trackWidth))
+     * log(trackWidth) * 0.725 = ln(Imax) - ln(scale) - 0.44*log(dT) - 0.725*log(aThickness)
+     */
+    double dtmp = log( aCurrent ) - log( scale ) - 0.44 * log( aDeltaT_C ) - 0.725 * log( aThickness );
+    dtmp /= 0.725;
+    double trackWidth = exp( dtmp );
+
+    trackWidth *= UNIT_MIL;     // We are using normalize units (sizes in meters) and we have mil
+    return trackWidth;          // in meters
+}
+
+
+void PCB_CALCULATOR_FRAME::TW_Init()
+{
+    int      tmp;
+    wxString msg;
+
+    // Read parameters values:
+    m_Config->Read( KEYWORD_TW_EXTTRACK_WIDTH_UNIT, &tmp, 0 );
+    m_TW_ExtTrackWidth_choiceUnit->SetSelection( tmp );
+    m_Config->Read( KEYWORD_TW_INTTRACK_WIDTH_UNIT, &tmp, 0 );
+    m_TW_IntTrackWidth_choiceUnit->SetSelection( tmp );
+    m_Config->Read( KEYWORD_TW_TRACK_COPPER_THICKNESS_UNIT, &tmp, 0 );
+    m_TW_CuThickness_choiceUnit->SetSelection( tmp );
+    m_Config->Read( KEYWORD_TW_TRACK_LEN_UNIT, &tmp, 0 );
+    m_TW_CuLength_choiceUnit->SetSelection( tmp );
+    m_Config->Read( KEYWORD_TW_CURRENT, &msg, wxT( "1.0" ) );
+    m_TrackCurrentValue->SetValue( msg );
+    m_Config->Read( KEYWORD_TW_DELTA_TC, &msg, wxT( "10.0" ) );
+    m_TrackDeltaTValue->SetValue( msg );
+    m_Config->Read( KEYWORD_TW_TRACK_COPPER_THICKNESS, &msg, wxT( "0.035" ) );
+    m_TrackThicknessValue->SetValue( msg );
+    m_Config->Read( KEYWORD_TW_TRACK_LEN, &msg, wxT( "20" ) );
+    m_TrackLengthValue->SetValue( msg );
+
+    // Init formulas text
+    m_htmlWinFormulas->AppendToPage( _( "<br><em>The formula (from IPC 2221) is:</em></br>" ) );
+    m_htmlWinFormulas->AppendToPage( _( "<br><b>I = K * dT<sup>0.44</sup> * (W*H)<sup>0.725</sup></b></br>" ) );
+    m_htmlWinFormulas->AppendToPage( _( "<br>Internal traces : <b>K = 0.024</b></br>" ) );
+    m_htmlWinFormulas->AppendToPage( _( "<br>External traces: <b>K = 0.048</b></br>" ) );
+
+    m_htmlWinFormulas->AppendToPage( _( "<br>where:</br>" ) );
+    m_htmlWinFormulas->AppendToPage( _( "<br><b>I</b> = maximum current in Amps</br>" ) );
+    m_htmlWinFormulas->AppendToPage( _( "<br><b>dT</b> = temperature rise above ambient in deg C</br>" ) );
+    m_htmlWinFormulas->AppendToPage( _( "<br><b>W,H</b> = Width and Thickness in mils</br>" ) );
+}

pcb_calculator/transline_ident.cpp

@@ -250,9 +250,9 @@ TRANSLINE_IDENT::TRANSLINE_IDENT( enum transline_type_id aType )
                                    _( "MurC" ), _( "Relative Permeability of Conductor" ), 1,
                                    false ) );
 
-        AddPrm( new TRANSLINE_PRM( PRM_TYPE_PHYS, PHYS_S_PRM,
-                                   _( "a" ), _( "Width of Waveguide" ), 10.0, true ) );
         AddPrm( new TRANSLINE_PRM( PRM_TYPE_PHYS, PHYS_WIDTH_PRM,
+                                   _( "a" ), _( "Width of Waveguide" ), 10.0, true ) );
+        AddPrm( new TRANSLINE_PRM( PRM_TYPE_PHYS, PHYS_S_PRM,
                                    _( "b" ), _( "Height of Waveguide" ), 5.0, true ) );
         AddPrm( new TRANSLINE_PRM( PRM_TYPE_PHYS, PHYS_LEN_PRM,
                                    _( "L" ), _( "Waveguide Length" ), 50.0, true ) );