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Boost 150mV to 1.5V

Discussion in 'Electronic Projects Design/Ideas/Reviews' started by Nursyukriah Idris, Mar 24, 2016.

  1. spec

    spec Well-Known Member Most Helpful Member

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    Hi Nursyukriah,

    Below is a link to the data sheet for the Linear Technology LTC3108 Ultra Low Voltage Step Up (boost) Converter. The data sheet explains how it works and also how it can be configured to produce 5V from your existing generator (motor) output so that would meet the first part of the task you have been set by your tutor. The data sheet is quite comprehensive and lists all the parts, including the input transformer, that are needed to build a boost converter.

    As we have emphasized many times on this thread, there won't be enough output current at 5V to illuminate an incandescent lamp that you mentioned in your opening post, but there will be enough current to illuminate a high efficiency red light emitting diode (LED). You would need to put the correct value of resistor in series with the LED though. The LTC3108 can be configured to produce 2.35V, 3.3V, 4.1V, and 5V output. Although your brief is to produce 5V, 2.35V would be better for driving a red LED as more current would be available and the LED would thus be brighter.

    From Farnell the LTC3108 is £5.50 UK to give you an idea of the cost.

    There is also a link below to the Linear Technology LTC3108 evaluation board data sheet. The evaluation board could be used if you didn't want to build the circuit yourself. As the evaluation board is quite expensive, at around £100 UK, you could try contacting Linear Technology direct and see if they could work something out for you, especially if you mention that you are investigating energy harvesting for Malaysia and you are in an academic establishment.

    spec

    DATA SHEETS & SOURCES

    (1) LTC3108
    http://cds.linear.com/docs/en/datasheet/3108fc.pdf
    http://uk.farnell.com/webapp/wcs/st...3&pageSize=25&showResults=true&aa=true&sf=731

    (2) LTC3108 Evaluation Board
    http://cds.linear.com/docs/en/demo-board-manual/dc1582B.pdf
    http://uk.farnell.com/linear-techno...XLqJDGmNHS0P6mOnXiaPca10bsaJ3eAhp0aAme28P8HAQ
     
    Last edited: Mar 30, 2016
  2. spec

    spec Well-Known Member Most Helpful Member

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    As this has been quite a long thread perhaps I could list the practical options that have been suggested so far:

    (1) Gear up the existing motor so that it spins faster and produces more output voltage and current post (Post #9)
    (2) Select a different generator (motor) that has a better output voltage and current at the same rotational speed as the turbine (Post #9)
    (3) Use a moving coil meter with a resistive load to indicate output power (Post #85)
    (4) Use energy harvesting techniques to generate 5V from the existing generator (motor) (Post#7, #8, #26), and illuminate a high efficiency LED (Post #121)

    spec
     
    Last edited: Mar 30, 2016

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