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
Step Up PSU for LCD - schematic

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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