The illustrated line flash unit can be used as a decoration for flower pots, fish tanks or toys. The circuit is connected to a typical astable multivibrator. When the 3 feet are high, LED2 is on, LED1 is dark; when 3 is low LED1 is bright and LED2 is dark. Adjusting the W potentiometer can change the flash frequency of the LED. The voltage of the 3 pin changes between 0 and 6V.
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