Please explain the sensors and some basic components listed below to pic interface

[rangerskm]

hi i went through some blogs and links ,after going through it i am many clarifications in the components and sensor which is interfaced with pic 16F877A .please explain the below questions.

1) explain the below mentioned sensors briefly with the application and their correctness in the real world while interface with pic

a) temperature sensor
b)flex sensor
c)humidity sensor
d)force sensor
e)gyro sensor
f)ir sensor

2)how these analog sensor values are calibrated for pic ADC INPUT.
3)i read a blog about arduino where analog sensors are interfaced along with a resistor(voltage divider).dont know why they connected like that in arduino.how do we connect analog sensors in pic??
4) do these sensor values affected by noise.if yes do we have to connect any signal conditioning circuits in pic to remove noise??
5)is it possible to connect camera and memory card in PIC??
6) what is the difference between polarised capacitor and non polarised capacitor??

i had listed many questions,if any one knows any thing .please help me .this thread will help students to learn basic hardware interface..

 

[embpic]

as you mention the list of interference with PIC which is measure using ADC. and most of the analog devices measure Voltage. so as resistance changes with there work then ADC read the voltage.
And to remove noise circuit is there in between sensor and ADC like IR, PT100 and so on...

 

[jayanth.devarayanadurga]

Sensors are not calibrated to ADC input range. ADC input range is 0 to 5V for 5V uCs and 0 to 3.3V for 3.3V uCs. Sensors can give voltage o/p or current o/p. If it gives current o/p then you need to pus a load resistor to convert it to voltage o/p for inputting to ADC of uCs.

Provide the link where sensors are used with voltage divider to get better answer.

Some sensor o/p get affected by noise.

Yes, Camera and memory card can be connected to uC.

Electrolytic capacitors and some tantalum capacitors are polarized i.e., they have polarity + and -. You need to connect to the right polarity. Non polarized capacitors are ceramic, mica, polyester, polypropelene, styrelene capacitors. They don't have polarity. They can be connected either way.

Google for answers before asking for questions.

 

[rangerskm]

hi brother

the link for arduino controller where voltage divider used is

https://bildr.org/2012/11/flex-sensor-arduino/


i tried for the projects to interface camera with pic16f877a but i didnt found,how we connect the camera??

by using which protocol we connect memory card ??

 

[jayanth.devarayanadurga]

See attached image. I think Flex Sensor is a resistive device and when it bends the resistance changes (R = (rho)l/a). 22k resistor and resistance of flex-sensor together make a voltage divider. 5V and 22k is constant. So if flex-sensor bends then resistance of it changes and hence current through flex-sensor and 22k changes and hence voltage drop across 22k changes which is fed to ADC.

If you are referring to SD Card then SPI is used.

 

[rangerskm]

suggest me any links for camera interface with pic

 

[jayanth.devarayanadurga]

What camera you want to interface? Cameras used in Robotic applications?

 

[rangerskm]

i want to use camera in home security .is it possible to connect cmos camera..i dont know about that ,i have to study about cameras and their interfaces

 

[jayanth.devarayanadurga]

**broken link removed**
**broken link removed**
http://dangerousprototypes.com/2012/04/09/interfaceing-cmos-cameras-to-8bit-microcontrollers/
**broken link removed**
http://www.robozes.com/inaki/dproject/

http://www.google.co.in/url?sa=t&rc...=OxgZuhF5go0YG0tRdqGNQQ&bvm=bv.53760139,d.bmk

**broken link removed**