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diff --git a/src/electronics/components/flipflop.h b/src/electronics/components/flipflop.h
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+++ b/src/electronics/components/flipflop.h
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+/***************************************************************************
+ *   Copyright (C) 2005 by David Saxton                                    *
+ *   [email protected]                                                    *
+ *                                                                         *
+ *   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 FLIPFLOP_H
+#define FLIPFLOP_H
+
+#include "component.h"
+#include "logic.h"
+
+class Simulator;
+
+/**
+@short Boolean D-Type Flip-Flop
+@author David Saxton
+*/
+class ECDFlipFlop : public CallbackClass, public Component
+{
+public:
+	ECDFlipFlop( ICNDocument *icnDocument, bool newItem, const char *id = 0L );
+	~ECDFlipFlop();
+	virtual bool canFlip() const { return true; }
+	
+	static Item* construct( ItemDocument *itemDocument, bool newItem, const char *id );
+	static LibraryItem *libraryItem();
+	
+private:
+	void inputChanged( bool newState );
+	void inStateChanged( bool newState );
+	void asyncChanged(bool newState );
+	void clockChanged(bool newState );
+	
+	LogicIn *m_pD;
+	LogicIn *m_pClock;
+	LogicOut *m_pQ;
+	LogicOut *m_pQBar;
+	LogicIn *setp;
+	LogicIn *rstp;
+	bool m_bPrevClock;
+	
+	bool m_prevD[2];
+	unsigned m_whichPrevD:1;
+	unsigned long long m_prevDSimTime;
+	Simulator * m_pSimulator;
+};
+
+
+/**
+@short Boolean JK-Type Flip-Flop
+@author Couriousous
+*/
+class ECJKFlipFlop : public CallbackClass, public Component
+{
+public:
+	ECJKFlipFlop( ICNDocument *icnDocument, bool newItem, const char *id = 0L );
+	~ECJKFlipFlop();
+	virtual bool canFlip() const { return true; }
+	
+	static Item* construct( ItemDocument *itemDocument, bool newItem, const char *id );
+	static LibraryItem *libraryItem();
+	
+private:
+	void inStateChanged( bool newState );
+	void asyncChanged(bool newState );
+	void clockChanged(bool newState );
+	bool prev_state;
+	LogicIn *m_pJ;
+	LogicIn *m_pClock;
+	LogicIn *m_pK;
+	LogicIn *setp;
+	LogicIn *rstp;
+	LogicOut *m_pQ;
+	LogicOut *m_pQBar;
+};
+
+
+/**
+@short Boolean Set-Reset Flip-Flop
+@author David Saxton
+*/
+class ECSRFlipFlop : public CallbackClass, public Component
+{
+public:
+	ECSRFlipFlop( ICNDocument *icnDocument, bool newItem, const char *id = 0L );
+	~ECSRFlipFlop();
+	virtual bool canFlip() const { return true; }
+	
+	static Item* construct( ItemDocument *itemDocument, bool newItem, const char *id );
+	static LibraryItem *libraryItem();
+	
+protected:
+	void inStateChanged( bool newState );
+	LogicIn * m_pS;
+	LogicIn * m_pR;
+	LogicOut * m_pQ;
+	LogicOut * m_pQBar;
+	bool old_q1;
+	bool old_q2;
+};
+
+#endif