Step Up PSU for LCD

  
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To start old Optrex DMC50264N LCD module you need to get +24V LCD bias voltage Where to get it if you have only low voltage 3 5V As LCD module drains very low current, it is possible to build very small DC/DC converter. There are lots of chips designed for this. I used MC34063, as I already had few of them in some old trash boards. The schem

atics are typical, used from datasheet. As the current is very low, it is possible to use very small SMD inductance. I didn`t find very small, so I used quite big- about 1cm tall



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