Simplest led blinker circuit (without microcontrollers and other chips)

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nmbg011

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I need simplest and cheap led blinker with three diodes, but without microcontrollers.

- If is it possible without capacitors or with very small
- Fast blinking
- Power supply is four 1,5 alkaline small batteries in serie to give 6V
- Led is red 2V 30mA, three in serie
 

The simplest way is to buy a flashing red led and connect two more plain red leds in series to it
 

Externet said:
The simplest way is to buy a flashing red led and connect two more plain red leds in series to it
Click to expand...

Yes I think about it, but how to regulate blinking frequency to be fast?

Can I use diac and capacitor like for AC ?
 

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