i have one electronic project i.e. to make touch bell/button/switch.It has one copper plate when it is pused the ckt switches on and loud speaker makes noise at o/p which has 80 ohm and 500 mW ratings.Pls give me answer in detail and as early as possible.thank u.
2006-07-19 21:32:41 · 2 answers · asked by maulik 1 in Science & Mathematics ➔ Engineering
I don't think your loudspeaker has 80 ohm @ 500 mW, but 8 Ohm, check again.
So, what you need is the thing that actually makes the "noise".
It is called a bi-stable multivibrator, and there is tons of literature on The Web how to build one.
Like....
http://www.play-hookey.com/digital/experiments/rtl_bistable.html
http://www.falstad.com/circuit/ex-multivib-b.html
http://www.talkingelectronics.com/FreeProjects/5-Projects/Page16.html
2006-07-19 22:22:26 · answer #1 · answered by Marianna 6 · 0⤊ 0⤋
great, you've just "invented" the door-bell...
have fun
2006-07-20 04:59:24 · answer #2 · answered by Anonymous · 0⤊ 0⤋