Fireflies in a bottle- Skyy Vodka.

Discussion in 'General Electronics Chat' started by Bernard, May 1, 2016.

  1. Bernard

    Thread Starter AAC Fanatic!

    Aug 7, 2008
  2. Bernard

    Thread Starter AAC Fanatic!

    Aug 7, 2008
    Random # 2 00000.jpg This is one use for a random pulse generator which uses 2 clocks, one slow, U1 & one fast, U2. When U1
    output is high, About 150 millis. U2 is enabled and oscillates at about 100 kHz & stops when U1-3 goes low, leaving one output of U3 high. In a 20 sec. period, every LED flashed at least once. From past experience
    using similar circuits sometimes the circuit seemed to learn and gave a repeating pattern. Using a candle LED, U4, to generate a few mV of noise at pin 5 of U2 cured the problem. U15,U16 generate a blanking pulse to
    inhibit the flashing LEDs when U3 is counting.
    A round circuit board is mounted to the inside of the lid of a cookie can; IC's wired dead bug style & SMT 2222's collectors soldered to a length of cu foil tape. Power is from 4 AA Alk. batteries or a 6 V DC wall wart.
  3. wayneh


    Sep 9, 2010
    Very cool. I know some folks that would love to have that.
  4. BR-549

    Well-Known Member

    Sep 22, 2013
    They have been drinkin coffee, or they are very excited.