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Topic: Voltage step up alternatives (Read 1 time) previous topic - next topic


Oct 27, 2012, 04:49 pm Last Edit: Oct 27, 2012, 05:43 pm by olof_n Reason: 1

I need to build a boost converter (step up to 30-40V 100mA 20mA to drive a IV-18 VFD) and have found three alternatives.

Alt 1.  555 IC, Inductor, Diode and capacitor (http://www.benjscott.com/2009/07/555-boost-converter/)
I tried alt 1 this week and it worked fine. By modify the frequency on the 555 I could change step up voltage easy.
First try I got 120V from 5V :)

Alt2. MC34063
Bought 10 pieces of MC34063 from ebay. Never used them but should be able to work as a step up converter to 40V.

Alt3. Voltage tripler circuit (http://www.electronics-tutorials.ws/blog/voltage-multiplier-circuit.html)
If I could find a 12v AC/AC adapter, I could triple the voltage to 36V DC.

What is the pros/cons with the three alternatives?



1: cheap and stable;
2: cheap. but not as efficient;
3: not workable for your purpose.

You can also configure your arduino into a boost controller.


Thanks for the quick reply!
That is good because alt 1 was very easy to build.


James C4S

I'm not familiar with the current requirements of the VFD, but the 555 solution is only ideal if the load never varies.  The MC34063 is a regulator and will provide a stable output as load as the load is within its specs.
Capacitor Expert By Day, Enginerd by night.  ||  Personal Blog: www.baldengineer.com  || Electronics Tutorials for Beginners:  www.addohms.com


You can also configure your arduino into a boost controller.

By simulating a 555 (oscillator with variable frequency) ?
If there's more about it, can you please tell a bit more?
Controller means regulating, right? Is the Arduino ADC fast enough to work in a closed loop in that area?

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