February Buildday Page 3

Sunday February 5th, 2006

Neil needs a 3 LED sequencer for another estes rocket conversion

LED ring connections made. Using Perfboard I can lay out a ring of LEDs without worrying about pad patterns. Test fitting the board into my own estes kit.
  Neil needs a 3 LED sequencer for another estes rocket conversion.   Using Perfboard I can lay out a ring of LEDs without worrying about pad patterns.   Test fitting the board into my own estes kit.
The clock generator, and 1 of 8 counter circuit (555 and 4020 cmos chips). It appears to fit exactly. Shinny.
  The clock generator, and 1 of 8 counter circuit (555 and 4020 cmos chips). It appears to fit exactly. Shinny.
    He asked for a 1,2,3 sequence but a 4020 gives you 1 to 8, and with lots of Blue LEDs stripped from ForeverBright Christmas Light sets. . .He gets an 8 ring LED configuration.  Looks like outputs 1 and 7 are lower than the full power! 1.5 volts as opposed to 2.x volts.  The circuit can be run at 4 volts, the chip limits the power so now worryies about over powering the Blue LEDs