Design circuit function

[Joseph313]

Please can any Body explain the function of this circuit, or how it works ?


HEADS OR TAILS
When the push-button is pressed, the circuit will oscillate at a high rate and both LEDs will illuminate. When the push button is released, one of the LEDs will remain illuminated. The 50k is designed to equalise the slightly different values on each half of the circuit and prevent a "bias."

The designed ciruit is on the link below:

http://talkingelectronics.com/projects/200TrCcts/200TrCcts.html

so why one of the leds are on and other is off when the push bottun is relesed ?

I appreciate your quickly replying .

 

[Joseph313]

Sorry this is the specified link for the design :

http://talkingelectronics.com/projects/200TrCcts/images/HeadsOrTails.gif

 

[RyreInc]

Multivibrator

 

[benta]

Astable multivibrator.

http://en.wikipedia.org/wiki/Multivibrator

Benta.

 

[RyreInc]

Ha, we responded at the same time with the same link!

 

[waross]

Then there were these multivibrators;

I'm not exactly sure what you are after, John, but prior to about
1960 most car radios had mechanical vibrators in them to convert 6 or
12 VDC into an interrupted DC (not really AC) so that the voltage
could be stepped up via transformer to 150 volts or so. This was
because the tubes or "valves" required higher voltages than the car
battery could supply. With the advent of solid state, 12VDC was the
perfect voltage so vibrators went the way of the buggy whip.

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[RyreInc]

Here is a link showing bistable multivibrator circuit in action:

http://www.falstad.com/circuit/e-multivib-bi.html

 

[Joseph313]

Thank you All , oh it seems that it has many applications

 

[IRstuff]

"prior to about 1960 most car radios had mechanical vibrators in them to convert 6 or 12 VDC into an interrupted DC (not really AC) so that the voltage could be stepped up via transformer to 150 volts or so."


Maybe REALLY early 60s, but my 62 Impala sported a TRANSISTOR radio...

TTFN
faq731-376

Need help writing a question or understanding a reply? forum1529

 

[waross]

62 was in the 60's, not prior to the 60's.
Dad's 60 Impala had the transistor radio. My 57 Buick and every other older car I knew had the a tube type radio and the mechanical multivibrator. Senior citizen question. How many remember waiting for the filaments to warm up in a tube type radio or TV?

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[Compositepro]

The mechanical vibrator produced a square wave AC, not an interrupted DC.