1. Video Transmitting RobotBy
Kunal Kolapkar TY ETC (38)
Pawan Hule TY ETC (59)
Tushar Joshi TY ETC (76)

2. Video Transmitting Robot
It is nothing but the wireless vehicle carrying a video camera and video transmitter design to explore the environmental monitoring & inspection.

3. The Video Transmitting Robot

4. Applications Delivering Security Building Measurement Research
Environmental Monitoring & Inspection
Home Helper

5. Working
The working of wireless robot is depends upon two important sections.
IR Transmitter
IR Receiver

6. What is Infrared? Types:
Infrared (IR) light is electromagnetic radiation with a wavelength longer than that of visible light.
Its frequency range is between 3 THz to 300 THz.
Types:
1. Infrared NIR  µm
2. Mid Infrared MIR  µm
3. Far Infrared FIR  µmcrometres.

7. IR Transmitter Size: Popular T-1 3/4 diameter package
Operating Voltage: 1.2 V
Operating Current: 20 mA
DESCRIPTION: Infrared (IR), high intensity, general purpose Light Emitting Diode (LED).

8. IR Receiver Size: Popular Side View package
Carrier Frequency fo: 38 KHz
Operating Voltage: 5.0 V
Operating Current: 2.4 mA
DESCRIPTION: Infrared (IR), high sensitivity, general purpose Infrared Receiver with Logic output functionality.

9. Video Transmission

10. What are video signals?
Video signals are time varying electrical signal voltage obtained from camera circuit representing special distribution of brightness information in the image is called Video signals.
The signal contains frequency that depends on scannig speed and the variation in the brightness of the image over the scanning lines.
Its bandwidth typically in the range of 25Hz to 5 MHz.

11. Video Transmitter Video Recording Camera Video Amplifier
Components of Video AM Transmitter:
Video Recording Camera
Video Amplifier
Amplitude Modulator
RF Oscillator
RF Power Amplifier

12. Video Amplifier
Video amplifier chips are used in circuits used to process video signals.
They carry performance specifications such as operating temperature, output power, supply voltage, and supply current.
Video amplifier chips are available in several integrated circuit (IC) package types.
Examples : single in-line package (SIP), dual in-line package (DIP), ceramic DIP (CDIP), and plastic DIP (PDIP).

13. Amplitude Modulator
A wide range of different circuits have been used for AM, but one of the simplest circuits uses anode or collector modulation applied via transformer.
Modulation circuit designs can be broadly divided into low and high level.
In small level, audio stage is used to modulate a low power stage; the output of this stage is then amplified using a linear RF amplifier
In high level the modulation takes place at the final amplifier stage where the carrier signal is at its maximum amplitude.

14. AM Waves

15. The AM Signals

16. RF Oscillator
A local oscillator is an electronic device used to generate a signal normally for the purpose of converting a signal of interest to a different frequency using a mixer. 
This process of frequency conversion, also referred to as heterodyning, produces the sum and difference frequencies of the frequency of the local oscillator and frequency of the input signal of interest.

17. RF Power Amplifier.
An RF power amplifier is a type of electronic amplifier used to convert a low-power radio- frequency signal into a larger signal of significant power, typically for driving the antenna of a transmitter.
It is usually optimized to have high efficiency, high output Power compression, good return loss on the input and output, good gain, and optimum heat dissipation.

18. Receiver Section

19. Receiver Components RF Amplifier Mixer IF Amplifier IF Carrier Filter
Demodulator
Baseband Filter

20. RF Amlifier
An RF power amplifier is a type of electronic amplifier used to convert a low-power radio- frequency signal into a larger signal of significant power, typically for driving the antenna of a transmitter.
It is usually optimized to have high efficiency, high output Power compression, good return loss on the input and output, good gain, and optimum heat dissipation.

21. Mixer
After amplifying the input signals in a RF amplifier it passed on to Mixer.
In mixer the modulated RF carrier is mixed with a sinusoidal waveform generated by local oscillator.
The process of mixing is also called Heterodyning.

22. What is mean by Heterodynig?
When you use the lower side-band (the difference between the two frequencies), you are superheterodyning.
Strictly speaking, the term superheterodyne refers to creating a beat frequency that is lower than the original signal.
Although we have used the example of amplitude modulation side-bands as an example, we are not talking about encoding information for transmission.
What superheterodying does is to purposely mix in another frequency in the receiver, so as to reduce the signal frequency prior to processing.

23. The Superheterodyne Receiver
A simple superheterodyne Receiver is as shown in above figure.

24. Advantages of Superheterodyning
It reduces the signal from very high frequency sources where ordinary components wouldn't work (like in a radar receiver).
It allows many components to operate at a fixed frequency (IF section) and therefore they can be optimized or made more inexpensively.
It can be used to improve signal isolation by arithmetic selectivity

25. IF Amplifier
In communications and electronic engineering, an intermediate frequency (IF) is a frequency to which a carrier frequency is shifted as an intermediate step in transmission or reception.
The IF amplifier (intermediate-frequency amplifier) provides most of the gain and the selectivity of the superheterodyne receiver.
since the IF amplifier (intermediate-frequency amplifier) always operates at a fixed frequency, it can be designed with very selective filters to ensure that only the wanted bandwidth is passed.

26. Baseband Filter
In daylight when contrast is insufficient, filter helps to improve contrast by attenuating ambient light twice before it comes back to observer.
Baseband filter translates the signal frequency to the carrier frequency.
The output of baseband filter gives RF signals which are then given to the display system.

27. Thank You