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I'll have to dig into it more when I have time. If so, I'll add it here. The BJT is likely to eat up a lot of power if very high currents are permitted -- resulting in a very inefficient converter. So I'm not too happy with it. Just thinking about it as a junk box way to go, is all.

I'll have to dig into it more when I have time. If so, I'll add it here. The BJT is likely to eat up a lot of power -- resulting in a very inefficient converter. It does this for exactly the reason it works so well -- that the BJT's \$V_{CE}\$ grows while the collector current is high, in order to shut off. This wastes power, too. So I'm not too happy with it. Just thinking about it as a junk box way to go, is all. You don't need efficiency, I'd suppose.

I'll have to dig into it more when I have time. If so, I'll add it here.

I'll have to dig into it more when I have time. If so, I'll add it here. The BJT is likely to eat up a lot of power if very high currents are permitted -- resulting in a very inefficient converter. So I'm not too happy with it. Just thinking about it as a junk box way to go, is all.

Please note that I didn't add enough stages to get anywhere near the voltage you want to generate. I suspect that you might get close to the voltage you want with something like 24 to 30 capacitors and diodes and even then you'd only get perhaps hundreds of nanoamps. (Should be relatively safe, though.)

There's another part missing here. There's nothing to specifically limit the voltage developed. Instead, it will depend on the vagaries of wiring and the devices themselves. Adding a load resistor would probably make a lot of sense, now. Just to keep the voltage down to some reasonable value. Or just use a small neon bulb, I suppose (if you can develop enough current in it.)

I'll have to dig into it more when I have time. If so, I'll add it here.

Please note that I didn't add enough stages to get anywhere near the voltage you want to generate. I suspect that you might get close to the voltage you want with something like 24 to 30 capacitors (and similar number of diodes.) You may get perhaps hundreds of nanoamps. (Should be relatively safe, though.)

There's another part missing here. There's nothing to specifically limit the voltage developed. Instead, it will depend on the vagaries of wiring and the devices themselves. Adding a load resistor would probably make a lot of sense, now. It would make the design more predictable. Or just use a small neon bulb, I suppose (if you can develop enough current in it.)

I'll have to dig into it more when I have time. If so, I'll add it here.

Just as an aside, energy in an inductor is stored in vacuum (space.) Magnetic materials concentrate flux lines by providing "short-cuts" (I think of them has magnetic short-circuits which do not and cannot retain energy.) The volume required for a boost inductor is approximately:

$$\textrm{Volume}= \left[\frac{\mu_0 \mu_r}{B_{max}^2}\right]\cdot\left[\frac{2 I_{out}\left(V_{out}-V_{in}\right)}{f}\right]$$

The first factor is more a matter of the materials you are using for the core. (The value of \$B_{max}\$ for core materials also is temperature dependent.) The second factor is in Joules and is basically the energy you need to store in interstitial vacuum, per cycle.