Simplified D1 Nocturnal Solar Engine

Discussion in 'The Projects Forum' started by Scrixx, Dec 8, 2010.

  1. Scrixx

    Thread Starter New Member

    Jan 19, 2010
    7
    0
    Hello, I'm fairly new at electronics and wanted to see if I could build a little pummer. These little guys seem simple enough, charge during the day, light show at night. The nocturnal solar engine I'm trying to build is the simplified D1 ( http://www.solarbotics.net/library/circuits/se_noct_SIMD1SR.html ). I'm having some trouble so I tried to build the circuit excluding the capacitor and solar panel since I'm using a power supply to troubleshoot.

    So I have the 2n3906 emitter connected to the positive of the power supply, its collector connected to the positive lead of the LED. The base of the 2n3906 is connected tot he collector of a 2n3904. The base connected to the collector of another 2n3904. The base of that 2n3904 is connected to the negative lead of the LED. The emitter of both 2n3904s are connected to ground.

    For testing shouldn't the LED light up with a consistent voltage running through the circuit? Is it possible to use 3 volts for the power supply?
    The circuit isn't very clear, the Q1, Q2, Q3 are not labeled. Can someone help clear up the circuit? Really want to build this little guy to be my companion.

    I hope this was the right place to ask this, thanks for the help and sorry if it is in the wrong section.
     
  2. shortbus

    AAC Fanatic!

    Sep 30, 2009
    4,006
    1,527
    You'll get more help if you post a schematic of your project :)
     
  3. Scrixx

    Thread Starter New Member

    Jan 19, 2010
    7
    0
    Well the schematic is on the link provided.. :confused:
     
  4. Scrixx

    Thread Starter New Member

    Jan 19, 2010
    7
    0
  5. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    Do you have a Voltmeter? If so, then copy or sketch the schematic and annotate the voltages you measure at various points in the circuit. Then scan your annotated schematic and post it here for us to look at. With voltages noted maybe we can spot what has gone wrong.

    hgmjr
     
  6. shortbus

    AAC Fanatic!

    Sep 30, 2009
    4,006
    1,527
    A lot of people will not go to a site they are not familiar with to look.
     
  7. KMoffett

    AAC Fanatic!

    Dec 19, 2007
    2,574
    230
    Also, linked sites often are altered or disappear over time, making the post useless. Images posted here remain with the post forever. :)

    Ken
     
  8. Audioguru

    New Member

    Dec 20, 2007
    9,411
    896
    The solar panel must be big enough and be in full sunlight to provide enough energy to light the LED. But a lighted red LED will not be visible in sunlight so run some wires to it in a shaded place.
     
Loading...