Make Yourself a Metronome

For those who would say “Metronome??? What!!!” here you go

A metronome is any device that produces regular, metrical ticks (beats, clicks) — settable in beats per minute.

It usually is used to practice rhythm by musicians usually guitarists. Read more..

All you need is:

555 timer                                                              

1K ohm resistors

220K Potentiometer

Breadboard (or a circuit board and soldering tools)

8 ohm Speaker

Connect it as shown below

   FOR ELECTRONICS ENTHUSIASTS:
The metronome here uses a 555 timer in its Astable mode to generate a square wave with 50% or more duty cycle which drives the speaker . Speaker in turn produces Beats from it. The pot used enables to vary duty cycle and hence the BPM of metronome. Vcc typically should be between 9V to 15 V.

It looks somewhat like this

Its kinda bushy once it gets on a circuit board and into a case it looks like a metronome..!!!


There is always a golden rule while doing these things
"Check n connect"
i.e before connecting the source check for any shorts or disconnections with a multimeter.
When you ignore this is what happens..!!

Evolved By "CHOICE"

After a long time I'm back with an interesting post...
If you wanna read ...read it full .....

A gigantic bang , " THE BIG BANG " made even the space to spread , gave out the main building block "Hydrogen", lightest element .
Then the greatest architect , designer etc etc "The Nature" made this shrink and the reason was what we call gravity. This created all the stars , nebulae , galaxies and so on .

There are millions of galaxies , billions of stars and possibly trillions of solar systems around those stars.
But as a random choice our Earth was chosen to be given special priority , a lucky fortune "LIFE"

Life started as some molecule combining ,which had a weird habit of replicating themselves.
These weird molecules have been designed and redesigned by Nature ( Which often many believe to be done by god , i say it this way , as i know earlier man named nature as god then he went on creating many others and as we know now there are many gods many religions . Sorry for getting carried away, back to subject ) 

This evolution gave out the fittest, strongest and intelligent creature "MAN"


Actually the main subject starts now....
One morning when i got up and went to  brush , i thought was it necessary to brush ( seems ugly thought isn't it???) i mean the nature being a great designer might have some solution to this.
I mean to say if we were not like what we are now , socialized and intelligent ,nature would have got some other solution to it.
As we know gorillas don't brush yet they are out of any plaque and infection because their diet has fibers that do the job.
If we follow gorillas we are sure not have any in 32 of our teeth .
Does that mean we are weaker than gorillas just because we are more intelligent than them!!!!!
This brush, teeth just being an example , humans are way weaker to animals , if all he has discovered is taken away from him.

 

Image from movingspirit.blogspot.com

This shows that humans are evolved by choice , that is he invented a brush to keep his teeth clean and now it has become must to have our teeth healthy. We are this way because we wanted to be this way!!!

All the evolutions so far were due to change in environment or species trying to adjust to it.

But one thing is for sure Nature will be suppressed in future evolutions and Its us , us and US 
No more nature no more god just US....




Thank you....