** Basic Logic Gates,Datasheets and Tutorials

1-NOT Gate (or Inverter or Complement Function)

Symbol:

Truth Table:

A	output
0	1
1	0

-------------------------------------------

2-AND Gate:

Symbol:

Truth Table:

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

-----------------------------------------

3- OR GATE:

Symbol:

Truth Table:

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

---------------------------------------

4- NAND GATE (NOT AND):

Symbol:

Truth Table:

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

-----------------------------
5-NOR GATE (NOT OR):
Symbol:


Truth Table:

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

-----------------------------
6-XOR GATE (Exclusive OR) (Comparison (Difference) Gate):
Symbol:

Truth Table:

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

----------------------------
7-XNOR GATE: (Exclusive NOR) (Equality Gate)
Symbol:

Truth Table:

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

----------------------------

Basic Gates Tutorials:

BASIC GATES (.PDF FILE FORMAT)

-----------------------------

Data Sheets of BASIC Logic Gates :

1-AND GATE (74hc08)
2-OR GATE (74hc32)

3-NOT GATE (74hc04)
4-NAND GATE (74hc00)
5-NOR GATE (74hc02)
6-XOR GATE (74hc86)

7-XNOR GATE (74hc810)

----------------------------

Data Sheets of Encoders:

1- 10-to-4 Encoder (CD74HC147E)

2- BCD-to-7 Segment (SN74LS47N)

Seven Segment LED Display Terminals:

** William.H.Hayt Engineering Electromagnetics 6th Edition And Solution

Dear Students ,

now I'm Presenting you the Famous Reference in Electromagnetics for William H.Hayt With Solution

Info About Reference :

Author of Book: William H. Hayt

Type of File : .rar (Zipped)

Type of Book: .PDF (Portable Document Format)

Size: 11.0 MB

Hard Cover of Book :

DOWNLOAD HERE

Note :

if Don't have Winrar Software DOWNLOAD HERE ( 2.0 MB)

if Don't have PDF reader DOWNLOAD HERE ( 3.0 MB)

**What Is a PCBs? and How Can we Make One at home?

A printed circuit board, or PCB, is used to mechanically support and electrically connect electronic components using conductive pathways or traces, etched from copper sheets laminated onto a non-onductive

substrate.

Advantages:

PCBs are rugged, inexpensive, and can be highly reliable.

How to make one at home?

Actually,there are two methods to do so

1-Toner Transfer Method : is to print the schematic of the circuit on Papers (i.e. Paper of a Magazine)

and attach the Printed paper to the Blank Copper Board and heat it.

2-UV Exposure Technique: is to print the schematic of the circuit on Papers (i.e. Paper of a Magazine)

and attach the Printed paper to the Blank Copper Board Sprayed with Photoresist material and then it is put on an UV lamp.

Actually the first Method is easier than the 2nd technique

so we'll Explain it in details

Requirements:

1-Magazines or advertising brochures

2-Laser printer (or Photocopier)

3-Household clothes iron (for heating the Copper)

4-Blank Copper Board (single side)

5-Etching solution ( Ferric Chloride ) to remove the copper on board that not

required

6-Kitchen scrubs to clean up the copper

How it works:

Laser printers and photocopiers use plastic toner, not ink, to draw images. Toner is the black powder that is resistant to etching solutions used for making PCBs - if only you could get it on copper!

Steps to accomplish a PCB:

1- Draw the schematic on a computer using PCB Making Softwares and then Print the schematic of the cct want to turn into a PCB on a magazine-paper

and make sure that you printed a mirrored view of the cct

2-cut the copper board to the required dimensions

3-Clean copper surface using Kitchen scrubs till copper becomes shiny

4- Attach the paper to the surface of copper and heat it using an Iron for 5 mins

5- remove the paper using water and the toner now is attached to the copper surface

6- put the board in Etching solution for 15-20 mins and then clean with plenty of water

7-Drill the Holes which are place of components and solder your elemnts

now we have a PCB made at home

This is a video to demonstrate the whole process from scratch

PRESS HERE TO PLAY

This is the Software I used to make PCBs Express PCB

**Project:Transformerless Power Supply

Description:This supply uses no heavy step down transformer and has an extremely low parts count. The circuit can be built very small and can supply small currents for small projects. The major downfall of this supply is that it is not isolated from the AC line and can only supply small currents

Schematic:

Table Of Components:

Part	Total Qty	Description
C1	1	0.39uF 250V Capacitor
C2	1	220uF 25V Electrolytic Capacitor
D1	1	1N4741 11V Zener Diode
BR1	1	1 Amp 200V Bridge Rectifier
MISC	1	Line Cord, Board, Wire, Case

Notes:

1-The value of C1 can be increased to increase the amount of current the circuit can supply. With the values shown, the circuit can supply up to about 15mA. Remember to increase the size of C2 also.

2-Please note that this circuit is not isolated from 120VAC. Because of this, the circuit must be treated with caution and encosed at all times. Do not work on the circuit (or any other circuits attached to it) when it is plugged in.

3-If you are running the circuit from 220VAC, then use a capacitor rated at greater than 400V for C1.