The following post presents a discussion between one of the readers of this blog and me, regarding the making of a whistle key chain finder at home.
Want to Make a Key chain Finder Circuit
After a little gap I am e-mailing you again.
This time I do not need any clarification on any of your projects. Rather, I have an idea which I would like to share with you.
First let me inform you clearly that the idea of making a home made circuit came in my mind from a small gift which was presented to one of my relatives by one of his old mates.
Now, you may be wondering what is the "gift" I am talking about. Well, it is nothing but a Chinese made "Whistle keychain finder" (please refer to the attachment).
The beauty of the product is that when it is switched on, it will only respond (a chime would start playing for a brief moment) to a whistle which we make from our mouth and NOT to any other sounds eg., if we blow a whistle or a flute etc.
Therefore, I would like to know from you, if this idea/concept can be used to construct a home based circuit project with the same feature and maintaining it's compactness in size, battery life and last but not the least keeping in mind the COST to be as low as possible. It can be a very useful project for our day to day life.
Waiting anxiously to hear from you soon.