Loading ...
Sorry, an error occurred while loading the content.

Micropower Step Up SE

Expand Messages
  • Manfred Schaffran
    hi folks, just a few ideas to give more complex BEAM-circuits power. 1. Problem: sunceram-solarcells are designed for outdoor-use. the normal SE has a fix
    Message 1 of 2 , Apr 24, 2003
    • 0 Attachment
      hi folks,
      just a few ideas to give more complex BEAM-circuits power.

      1. Problem:
      sunceram-solarcells are designed for outdoor-use. the normal SE has a fix
      trigger level of about 2.7V. In an indoor environment this trigger level is
      often never reached.

      2. Problem:
      a slight shadow over the solarcell discharges the capacitor.

      3. Problem:
      the voltage of the solarengine drops under 0.7V in the discharging phase. a
      circuit with memory (e.g. for learning) needs a continuos power source.(OK,
      I'm working on an solar-powered BEAM-Pic-critter :-) )

      4. Problem:
      a small cap charges fast, but allows no complex actions.
      a big cap allows complex actions, but it takes too long to charge it.

      Solution:
      i found a micropower step-up DC/DC converter in a BitChar-G micro RC car and
      was surprised when i found out that the standby supply current was only 0.6
      micro Ampere. Should be a good thing for a SE. That should solve problem 1 &
      2.
      The double charging was discussed some time ago(?). here is my solution. the
      enable-output could be for a 74HC240 (e.g. eating behaviour).

      have fun

      manfred


      Further Reading:

      ME301 micropower step-up DC/DC converter:
      http://www.microne.com/edoc/files/ME301-English.pdf

      AT1E301 micropower step-up DC/DC converter:
      http://www.aimtron.com.tw/product/AT1301.pdf

      ST5R30M micropower step-up DC/DC converter:
      http://www.premier-electric.com/files/STM/pdf/ST5R25M%20.pdf
    • Jonathan Challinger
      are there any numbers on the converter?
      Message 2 of 2 , Apr 24, 2003
      • 0 Attachment
        are there any numbers on the converter?

        Manfred Schaffran wrote:
        hi folks,
        just a few ideas to give more complex BEAM-circuits power.
        
        1. Problem:
        sunceram-solarcells are designed for outdoor-use. the normal SE has a fix
        trigger level of about 2.7V. In an indoor environment this trigger level is
        often never reached.
        
        2. Problem:
        a slight shadow over the solarcell discharges the capacitor.
        
        3. Problem:
        the voltage of the solarengine drops under 0.7V in the discharging phase. a
        circuit with memory (e.g. for learning) needs a continuos power source.(OK,
        I'm working on an solar-powered BEAM-Pic-critter :-) )
        
        4. Problem:
        a small cap charges fast, but allows no complex actions.
        a big cap allows complex actions, but it takes too long to charge it.
        
        Solution:
        i found a micropower step-up DC/DC converter in a BitChar-G micro RC car and
        was surprised when i found out that the standby supply current was only 0.6
        micro Ampere. Should be a good thing for a SE. That should solve problem 1 &
        2.
        The double charging was discussed some time ago(?). here is my solution. the
        enable-output could be for a 74HC240 (e.g. eating behaviour).
        
        have fun
        
        manfred
        
        
        Further Reading:
        
        ME301 micropower step-up DC/DC converter:
        http://www.microne.com/edoc/files/ME301-English.pdf
        
        AT1E301 micropower step-up DC/DC converter:
        http://www.aimtron.com.tw/product/AT1301.pdf
        
        ST5R30M micropower step-up DC/DC converter:
        http://www.premier-electric.com/files/STM/pdf/ST5R25M%20.pdf
        
        
        ------------------------ Yahoo! Groups Sponsor ---------------------~-->
        Get A Free Psychic Reading!
        Your Online Answer To Life's Important Questions.
        http://us.click.yahoo.com/pDi3hB/OC5FAA/AG3JAA/7brrlB/TM
        ---------------------------------------------------------------------~->
        
        To unsubscribe from this group, send an email to:
        beam-unsubscribe@egroups.com
        
         
        
        Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ 
        
          




      Your message has been successfully submitted and would be delivered to recipients shortly.