Automatic Toilet Flusher

[Techbuilder]

Hi Techbuilder,

search Google:
IS471FE
Find this (second hit):
http://document.sharpsma.com/files/L...ce-opic_AN.pdf
On this Sharp application note:
Light Detecting Device-opic
Search for:
IS471FE
Page 5 tells us:
the parameters of the IS471FE
Page 24 shows us the internal / external hook-ups of the IS471FE
<IMG SRC="http://www.picbasic.co.uk/forum/attachment.php?attachmentid=2326&stc=1&d=120200443 9">
Mostly it looks like it will operate with 5V DC input.
It has “open collector” output.
It has a built in 10k “pull-up” resistor.

so it LOOKs like you could use a circuit like this:
<IMG SRC="http://www.picbasic.co.uk/forum/attachment.php?attachmentid=2325&stc=1&d=120200428 1">
Thanks to:
Garrett Hamilton–Smith, Raihan Khondker, and Will Norris,
School of Information Technology and Engineering, University of Ottawa
http://www.g9toengineering.com/AllSa...dproximity.htm

-Adam-

Thanks, would it be hard to compile a code to detect using this method?

[Pic_User]

Hi Techbuilder,

You could consider the module like a push button. Your program would need to watch for a low or 0 (zero) to know someone / some thing had come close to the sensor module.

-Adam-

[Techbuilder]

Ohh ok

I get it

So if I want to change the range to about 6 inches would that be done by changing the resistance to the IR leds?

[Pic_User]

That web page said "approximately 15cm". I had to use an on-line calculator because I am an old phart, and it said almost 6 inches (5.9").

[Techbuilder]

Cool

thanks I appreciate it

and I appreciate everyone else helping me

Well I am going to order that Sharp IS471FE and then write a program
well try and then post my progress.

Thanks everyone

[Pic_User]

Techbuilder,

How about:
You order the Sharp IS471FE and start the program right away, while you are waiting.

You can substitute a switch.

When the IS471FE gets there you can just add it.

This is actually a good way to build and test as you go.

-Adam-

[Techbuilder]

That's a good idea


thanks Pic_User