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BS2 PWM and LED — Parallax Forums

BS2 PWM and LED

xesxesxesxes Posts: 9
edited 2009-01-23 04:19 in BASIC Stamp
I have 2 clusters of LEDs that I am trying to get to pulse, I have them resisted properly to run on 5v but when I go through the BS2 they are very dim. Is there anyway to achieve maximum brightness? I am still pretty new so I am sorry if my information is shotty.

Thank you,
-Travis

Comments

  • SRLMSRLM Posts: 5,045
    edited 2009-01-21 02:33
    Are you running all the LEDs from the same pin? You're probably drawing too much current. What happens when you run just one? Also, what is your duty cycle? If you pulse them mostly low, then they'll be dim.
  • PJAllenPJAllen Banned Posts: 5,065
    edited 2009-01-21 02:53

    Some co
    bs2
    bs2
    white_pulsate1.bs2
    733B
  • xesxesxesxes Posts: 9
    edited 2009-01-21 22:19
    update, I managed to get them brighter by using a PNP transitor to allow a higher mA to the LEDs
  • metron9metron9 Posts: 1,100
    edited 2009-01-23 04:19
    You can also use a 555 timer to power up to 200mA by toggeling the reset pin from the stamp. NPN fets are also very easy to use.

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