$8.98
National Semiconductor LM2576HVT-ADJ Simple Switcher Voltage Regulator, Single Output in Volt, 5-Pin, 10.16 mm L x 4.7 mm W x 8.89 mm H (Pack of 2)Amazon$8.90
National Semiconductor LM318N Single General Purpose OP Amplifier, 8-Pin, -20 Volt, MDIP Rail, 9.27 mm L x 6.35 mm W x 3.3 mm H (Pack of 10)Amazon$8.99
Texas Instruments/National Semiconductor LM339N LM339 Quad Comparator ICS (Pack of 3)Amazon$7.50
Texas Instruments/National Semiconductor LM339N LM339 Quad Comparator ICs (Pack of 8)Amazon$9.99
National Semiconductor LM567 LM567C LM567CN General Purpose Tone Decoder DIP8 5 PiecesAmazon$5.49
National Semiconductor LM386N-1 LM386 Wide Input Voltage Low Power Audio Amplifier with Internal Gain DIP-8 (Pack of 20)Amazon$13.08
National Semiconductor LM386N-1 Semiconductor, Low Voltage, Audio Power Amplifier, Dip-8, 3.3 mm H x 6.35 mm W x 9.27 mm L (Pack of 10)Amazon$11.49
Generic National Semiconductor Dm7400n Ic 2-Input Quad Nand Gates Dip 14 PinAmazon