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diff --git a/src/electronics/simulation/capacitance.h b/src/electronics/simulation/capacitance.h
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+++ b/src/electronics/simulation/capacitance.h
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+/***************************************************************************
+ *   Copyright (C) 2003-2004 by David Saxton                               *
+ *   david@bluehaze.org                                                    *
+ *                                                                         *
+ *   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.                                   *
+ ***************************************************************************/
+
+#ifndef CAPACITANCE_H
+#define CAPACITANCE_H
+
+#include "reactive.h"
+
+/**
+@author David Saxton
+@short Capacitance
+*/
+class Capacitance : public Reactive
+{
+public:
+	enum Method
+	{
+		m_none, // None
+		m_euler, // Backward Euler
+		m_trap // Trapezoidal (currently unimplemented)
+	};
+	Capacitance( const double capacitance, const double delta );
+	virtual ~Capacitance();
+	
+	virtual Type type() const { return Element_Capacitance; }
+	/**
+	 * Set the stepping use for numerical integration of capacitance,
+	 * and the interval between successive updates
+	 */
+	void setMethod( Method m );
+	virtual void time_step();
+	virtual void add_initial_dc();
+	void setCapacitance( const double c );
+	virtual void add_map();
+	
+protected:
+	virtual void updateCurrents();
+	virtual bool updateStatus();
+	
+private:
+	double m_cap; // Capacitance
+	Method m_method; // Method of integration
+	
+	double g_eq_old;
+	double i_eq_old;
+};
+
+#endif