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hey guys check this out I'm really excited today because I found something I had no idea existed it's the negative resistance region of certain transistors when you buy as them in a certain way that you can utilize to make a very simple single transistor relaxation oscillator such as this one right here just got a blue LED flashing at low frequency but let me first explain how this came about I started out with these this box of transistors right here they're swb to 433 and this is the paper that I came with came with the box there is no other documentation and apparently Texas Instruments themselves don't have any documentation for this thing either they say it might be a custom part so really the only way to learn about them is to throw them on a curve tracer like I have here so I have actually two transistors on the curve tracer one is the SW b-24 o'the 24:33 and then ever just ordinary 2n 34 wait yeah - I mean - and 3904 very common small signal transistor so I got that on there lo