Project Without Microcontroller!!!

[Eng.Sara]

Hello
i have project to controlling the door without Microcontroller.. i will use IR-Sensor , Switch , LED connected with parallel port to USB port , then from USB to the PC which connect the webcam.. my question is how to design the Circuit with the above components ??
Any Help!!!

 

[Gobbledok]

That hurts my eyes!

Why do you need a webcam and a PC for an automatic door?

You do know that there were electronic circuits before microcontrollers were invented?!

 

[Wond3rboy]

Hi,

Welcome to the Forum!

With the components you have listed you are actually not 'controlling' a door since you would require some kind of drive(motor etc) to move the door around. As far as detecting whether a door has been opened or not is easy. Use an IR transmitter to continuously transmit a beam to the IR Receiver(sensor). You can than read the signal off the receiver output to light an LED or sound an alarm using appropriate components. If you want to use a webcam than you will need to use some software/write one. Its quite simple in LabVIEW though but you would require an understanding of of labview to use it ofcourse.

 

[atferrari]

Small scale?

Presumably you intend your project to be very small.

SMD is the route to go.

 

[Eng.Sara]

Note: is not a real door but is a LED , actually i have two LED (red & green ) when the red LED will light that's mean the door now is closed but when the green LED is light that mean's the door now is opening .. did u get it!!!

 

[Eng.Sara]

see the idea of the project is not small at all .. i have to design this circuit which connected to parallel to USB port then to the PC ,and the PC to save that video will take from normal webcam..
also on the PC i have to run a java code to start\stop capture a video for 5 sec
NOW the idea is clear??

 

[alec_t]

NOW the idea is clear??

Afraid not. Do you already have a circuit which controls the LEDs? Is the webcam just monitoring the LEDs? Why does the webcam output have to go via the parallel port then the USB port to the PC? Couldn't it miss out the parallel port and go directly via the USB port? What is the webcam output signal format/protocol?

 

[Eng.Sara]

The aim objective of this project is to develop an automatic door opening system with security camera recording. The idea is that when someone approaching the door, it will be open automatically. At the same time video recording is done for 5 seconds and then saved. So recording is done only when there is someone presence in front of the door and this also saves a lot of storage capacity.


and this is the block diagram may help u to get the main idea
https://imageshack.us/photo/my-images/404/blockdiagram1.jpg/

 

[Wond3rboy]

Hi, you can use an IR transmitter and Receiver to detect the door opening, you can poll the output of the receiver using the parallel port. When you get the indication, start the timed recording.

 

[wkrug]

I want to take a Radar Sensor with Amp instead an Infrared Transmitter.
Look at www.conrad.de with order Code 502667 or 502370.
It gives out a voltage or frequency, when some motion is in receive Area.
I think your idea is to complicated.
I would use a FT232 Bridge ( e.g. FT232RL from FTDI ) in Bit Bang mode.
So you could control and read out some Ports that start the recording of your camera.

When frequency is present, one In- Port is high and the PC starts recording.
When frequency goes off, a short time recording goes on and then it will be switched off.
The same signal could be used for the door opener.
One little Problem is, when a person stands direct in the door without motion.
Then the Radar Sensor gives no Signal. You could solve this with a infrared distance sensor that measures the space under the door.
Additional the Power of the door mechanic should be so low that it represent no danger for a Person that stand there. Or you can use touch sensitive strings at the door's front that opens the door again when there is some touch.