OK, you;ve already indicated you want to create a dtmf "password" system for your door. If you do that ( shift register and comparator and binary thumbwheel awitch gang are the components), throw a flipflop which fires and keeps the system from operating after 2 or three attempts, waits 10 seconds and resets. Brute forging a 10 digit number is trivial because modern computers can run through that many numbers in 10 secs or so. Brute forcing a 10 digit number with 5 secs between guesses will take s/t like 400 years. Aw heck, just the dtmf encoding of a 10 digit number will take 2 secs as each pulse is .1 sec and there should be a .1 sec space between. Just make the fail action be to wait a few secs. So, the point is that your system should be set such that making the call allows one to enter the codes, not that making the call performs the action. I've seen a number of dtmf devices for the home over the years. Now that one can put a webserver on a chip, the trend is browser for remote control. But at one time telephone control of devices was a big deal. Real cool hack btw! Cheers -sam

This is really good - but leaves me thinking, fantastic idea, looks cool, works really well but what can I possibly do with it that is useful? Bit like an Apple Mac really... ;P

2034 AD Time flies like an arrow; Fruit flies like a banana. Ashish Derhgawen - http://ashishrd.blogspot.com[^]

The car's controller. :) The computer is using the car's controller for communicating with the car. Check out this post: http://ashishrd.blogspot.com/2007/02/computer-controlled-rc-car.html[^] Ashish Time flies like an arrow; Fruit flies like a banana. Ashish Derhgawen - http://ashishrd.blogspot.com[^]

Ha ha! Thanks Vunic :laugh: Ashish Time flies like an arrow; Fruit flies like a banana. Ashish Derhgawen - http://ashishrd.blogspot.com[^]

Ashish, Thats pretty cool what you did :) For the full hobby scale RC cars and even aircraft we use www.endurance-rc.com 's PCTx, Phil over there has a USB interface to the trainer port on R/C radios. I wrote the .net library for it which is on the site, i have alot of fun with the PCTx. If you want to look at automation stuff for R/C take a look at www.rc-cam.com, their forums are full of this sort of thing, they'd probably love to see what you've done. Great work! -- Real programmers don't comment their code. It was hard to write, it should be hard to understand.

He hasn't found a way of hooking it up to Jeff's missles yet though, or my air-rifle :rolleyes: I have no idea what I just said. But my intentions were sincere. Poore Design

One caution with using mailto: If the person needing to send email does not have an email client set up on their machine (i.e. outlook express with a mail account set up) they will not be able to use the link because there is no email client to process the email on their machine. An example of this is the person who uses gmail, yahoo, hotmail, etc. I usually offer multiple ways to send email, one of which is that they can type the email address – encoded on the web site of course - into their web mail client. Typically I will set up a form where they select from a predefined drop down list, if there are more than one potential recipients, who to send the email to. customer_support@, technical_support@, sales@, webmaster@, etc. I also provide a drop down selection of predefined subjects. General Inquiry, Billing Question, Comments, etc. I provide a place for the message and send it via a server side script using the servers email service. I provide a place for an email address to be entered and if they do not enter one I inform them that it is required, or, if optional, that they will not receive a reply if there is none supplied. This gives them an option of sending a comment anonymously. In practice I usually require an email address but have been known to solicit anonymous comments for clients who wanted it that way. The one drawback to this approach is that they can enter a false, well formed, email address but in my experience that is not a problem. People who take the time to fill out a form are usually legitimate. I will email you the URLs of some sites I have developed that demonstrate what I am talking about but cannot post the URLs here because these are commercial sites and it would be advertising. If you are interested after you see the examples I can show you the code in the web development forum. I'm on-line therefore I am. JimmyRopes

Plus it is seriously cool. Seriously cool people are always allowed to bend the rules. :) Ðavid Wulff What kind of music should programmers listen to? Join the Code Project Last.fm group | dwulff I'm so gangsta I eat cereal without the milk

I haven't put the source on my blog..but I soon will. :) Time flies like an arrow; Fruit flies like a banana. Ashish Derhgawen - http://ashishrd.blogspot.com[^]

Awesome! That makes me wonder if it's possible to set up three of the rotating mirror assemblies with different color lasers (red, green, blue or maybe yellow, magenta, cyan) and point them at the same destination. Then maybe have variable intensities on the laser light... Very creative stuff.

I'm sure that could be avoided with some decent shape and size analysis!

oh no - I got bashed pretty hard for that "Jack Shit"-joke. But then again, using the s-word in the proximity of people under 30 seem to be dangerous in the states. Luckily, Denmark and Sweden are a bit more relaxed :-D Do you know why it's important to make fast decisions? Because you give yourself more time to correct your mistakes, when you find out that you made the wrong one. Chris Meech on deciding whether to go to his daughters graduation or a Neil Young concert

Cool! Oh the days of playing with the parallel port... Rocky <>< Latest Code Blog Post: Vista for Web Development, Read this first! Latest Tech Blog Post: Blog changed to Subtext!

Thanks Guffa! I never thought of that.:) Time flies like an arrow; Fruit flies like a banana. Ashish Derhgawen - http://ashishrd.blogspot.com[^]

Thanks. I'm overwhelmed with joy. :) Time flies like an arrow; Fruit flies like a banana. Ashish Derhgawen - http://ashishrd.blogspot.com[^]

The little movies sure were amusing and entertaining! Any sufficiently gross incompetence is nearly indistinguishable from malice.