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18.5VDC to 12VDC or 18.5VDC to 24VDC ? Answered

Does any one know how to make a 18.5VDC to 12VDC converter or a 18.5VDC to 24VDC Converters



Best Answer 8 years ago

Going from 18.5V to 12 V is easy.  All you need is a simple 7812 voltage regulator and a few capacitors.

Going from 18.5V to 24V is a little harder, you need a DC to DC converter.  You could build your own, or buy it neatly pre-packaged in a variety of different power and input voltages.

Here's one with a 2W rating, and accepts an input voltage between 18 and 36V.

But if you want to make your own, there are plenty of designs out there.  Linear Technologies has lots of ICs designed specifically for this purpose.  Visit their site and take a look through their extensive selection.

Give us some more detail on what you've got and want to do with it?


Dropping the voltage, depends on current and required efficiency. Usuallyt cheap. Boosting the voltage, depends on current and efficiency. More expensive.

Various people do ready to go modules. Building your own switching regulator is not recommended, if you aren't very familiar with the circuit techniques.


Lowering the voltage: Search for regulator circuit designs.

Raising the voltage: Search for "DC to DC converter" designs.

Both have been discussed here on Instructables previously; both can be found elsewhere on the net with a bit of websearching.