Thursday, January 13, 2011

Soft blinker with a NE555

And again a circuit with my favourite IC: the NE555!
Here is my version of the soft blinker:
You see right, there is no preresistor for the LED, due to the extremly high base resistor of the transistor!
Here is how much current flows through the LED:
    The current is between 2 and 5 milliamps, so you could also connect an npn-transistor to drive whole arrays with it.
It is not a sine wave, but a sawtooth.
But hey, it's a soft blinker with a NE555!
Here is a video I took of my prototype.


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