The next step of this project was to move beyond using an existing "self-oscillating" supply and instead try to design one of our own (that didn't spike without a load, and that didn't make an annoying 1-2KHz buzzing noise).
We decided that it would be nice if this supply ran off of 5V, so the first step was attempting to design a DC-DC boost converter that transformed 5V into ~150.
To do this we first tried using the LT8304 for the control circuit, and then tried the AZ34063UMTR.
![](https://cdn.hackaday.io/images/8171591504484240572.jpg)
![](https://cdn.hackaday.io/images/3579181504484257694.jpg)
Both of these had problems with efficiency though, and ultimately, we decided to return to the problem of designing a better DC-DC converter at a later time. For testing, we took a standard wall wart, and rewound the transformer so that it would output 170V DC.
This is not a particularly safe thing to do (and would almost certainly violate some safety guideline regardless of where you attempted to distribute such a thing), but for testing it's been really handy :).
![](https://cdn.hackaday.io/images/8082691504483878786.jpg)
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