--- nand.py-
+++ nand.py
@@ -239,6 +239,34 @@
 		self.jt_s.new_pin().conn = Pin(self, 'nQ')
 		self.jt_s.new_pin().conn = self.nand_r.inp_b
 
+class JKFF(Obj):
+	def __init__(self, parent, name='jkff', latency=10):
+		Obj.__init__(self, parent, name)
+		RSFF(self, 'rsff', latency)
+		NAND_N(self, 3, 'nand_3_J', latency)
+		NAND_N(self, 3, 'nand_3_K', latency)
+		Joint(self, 'jt_Q')
+		Joint(self, 'jt_nQ')
+		Joint(self, 'jt_clk')
+
+		Pin(self, 'CLK', 'L').conn = self.jt_clk.new_pin()
+
+		Pin(self, 'J', 'L').conn = self.nand_3_J.inp_1
+		self.jt_clk.new_pin().conn = self.nand_3_J.inp_2
+		self.nand_3_J.out.conn = self.rsff.R
+
+		Pin(self, 'K', 'L').conn = self.nand_3_K.inp_1
+		self.jt_clk.new_pin().conn = self.nand_3_K.inp_2
+		self.nand_3_K.out.conn = self.rsff.S
+
+		self.rsff.Q.conn = self.jt_Q.new_pin()
+		self.jt_Q.new_pin().conn = Pin(self, 'Q')
+		self.jt_Q.new_pin().conn = self.nand_3_K.inp_0
+
+		self.rsff.nQ.conn = self.jt_nQ.new_pin()
+		self.jt_nQ.new_pin().conn = Pin(self, 'nQ')
+		self.jt_nQ.new_pin().conn = self.nand_3_J.inp_0
+
 class CLK(Obj):
 	def __init__(self, parent, hz=1.0, name='clk'):
 		Obj.__init__(self, parent, name)