Hidden Camera, The wonder of science!!!!

Hidden Camera, The wonder of science!!!!

Now a days science and technology  have been advancing very fast which results so many wonderful discoveries. Hidden camera or spy camera is one of the most wonderful achievement of science. It can be both wired or wireless .The wired hidden cameras are (see here:<a href="http://www.smartstun.com/HIDDEN-Cameras-w-DVRs_c_62.html">hidden cameras</a>)connected with TV, VCR, or digital video recorder (DVR).   On the other hand when there is need of transmitting video signal through a receiver  within a small radius           (like 100 feet) wireless hidden cameras are badly in needed.

Uses of hidden cameras:

Hidden cameras are widely used in different TV shows. The “Telefé”(TV channel of Argentina) was first used hidden camera in one of their tv show called “Videomatch” in the year of 1991.

BIPOLAR LOGIC FAMILIES

Hi, this is my first post. This post is effective for the students who are studying Electronics and Communication Engineering (major in electronics) . From this topics you are able to know about the bipolar logic families. Other topics related with it will be discussed further.

BIPOLAR LOGIC FAMILIES:

The main elements of a bipolar are resistor , diode transistor ,capacitors

1.      SATURATED

1.      NON-SATURATED

The saturated bipolar logic ICs are:

1.      RTL-(RESISTOR- TRANSISTOR LOGIC)

2.      DCTL-(DIRECT- COUPLED TRANSISTOR LOGIC)

3.      I²L-(INTEGRATED-INJECTION LOGIC)

4.      DTL-(DIODE TRANSISTOR LOGIC)

5.      HTL-(HIGH-THRESHHOLD LOGIC)

6.      TTL-(TRANSISTOR-TRANSISTOR LOGIC)

The non-saturated bipolar logic ICs are:

1.      Schottky TTL,

2.      Emitter-coupled logic

UNIPOLAR LOGIC FAMILIES:

1.      PMOS-(P-CHANNEL)

2.      NMOS-(N-CHANNEL)

3.      CMOS(COMPLEMENTARY both p and n channel)

CHARACTERISTICS OF DIGITAL ICs:

1.      Speed of operation.

2.      Power dissipation.

3.      Figure of merit.

4.      Fan-out.

5.      Current and Voltage parameters.

6.      Noise immunity.

7.      Operating temperature range.

8.      Power supply requirements

9.      Flexibilities available.

THIS IS ALL FOR THIS TIME