Other gates made with NAND

Source :: http://www.doctronics.co.uk/4011.htm

An important property of NAND gates is that they can be linked to perform the functions of other logic gates. In fact, any logic function can be implemented using only NAND gates:
If you have designed a system which needs a NAND gate, a NOT gate and an AND gate, you might think of using a separate integrated circuit for each logic function. This would leave you with a circuit in which there were three unused NAND gates, five unused NOT gates and three unused AND gates. It is a lot more efficient (and cheaper) to use NAND gates to implement the other functions. All three gates can be made with just one 4011 integrated circuit.

4011 : 2-input NAND gates (easy IC )

Source :: http://www.doctronics.co.uk/4011.htm

Pin connections

The 4011 has four separate 2-input NAND
gates which you can use independently.

Truth table

The truth table of each individual gate is:

input B	input A	output
0	0	1
0	1	1
1	0	1
1	1	0

where '0' represents a LOW voltage, and '1' represents a HIGH voltage.

LM317 - Adjustable Regulator 1.5V

Sorce : http://www.national.com/pf/LM/LM317.html

Features

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•	Guaranteed 1% output voltage tolerance (LM317A)
•	Guaranteed max. 0.01%/V line regulation (LM317A)
•	Guaranteed max. 0.3% load regulation (LM117)
•	Guaranteed 1.5A output current
•	Adjustable output down to 1.2V
•	Current limit constant with temperature
•	P + Product Enhancement tested
•	80 dB ripple rejection
•	Output is short-circuit protected

General Description

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The LM117 series of adjustable 3-terminal positive voltage regulators is capable of supplying in excess of 1.5A over a 1.2V to 37V output range.

LM741 - Op-AMP (Operational Amplifier)

General Description

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The LM741 series are general purpose operational amplifiers which feature improved performance over industry standards like the LM709

Source : http://www.national.com/pf/LM/LM741.html