If you need higher voltages at modest currents you can consider using one of many voltage doubler circuits after the booster. Just make sure you have enough Ic and simulate it.<p><a href="https://en.wikipedia.org/wiki/Voltage_doubler" rel="nofollow">https://en.wikipedia.org/wiki/Voltage_doubler</a><p><a href="https://en.wikipedia.org/wiki/Voltage_multiplier" rel="nofollow">https://en.wikipedia.org/wiki/Voltage_multiplier</a>
That's pretty bad... When calculating the efficiency, transitional effects and non-ideality of parts are critical. And what does the author choose? A generic mosfet, unnamed diode, constant duty cycle.. this is not realistic at all.<p>And the selection of parts seems just random, especially given low output power (0.1W), no design will use it. A MOSFET for 5V circuit. 1KHz switching frequency (!). Fixed duty cycle and voltage regulation via inductance changes (!!). Huge inductors (0.3H!), because of very low frequency.<p>All this blog post shows is that author can put parts into simulator. Very little relation to real world.
If you get rid of the diode and instead use a well timed MOSFET, you can save a diode's drop worth of energy on each cycle. Synchronous switching supplies as they are called can have over 95% efficiency
Have you considered this one? <a href="https://en.m.wikipedia.org/wiki/Cockcroft%E2%80%93Walton_generator" rel="nofollow">https://en.m.wikipedia.org/wiki/Cockcroft%E2%80%93Walton_gen...</a>
wehnelt interrupter / electrolytic interrupter can work as a switching up or down converter, fully analog, no transistors, thyristors, no ic, no capacitors, just coil.<p>single electric motor can be used stationary as a transformer<p>or in pairs, in motion like inverter, rectifier, (synchronous rotary converter)<p>autotransformer