I've forgotten more about electronics than I remember which is probably why I don't understand why the waveform at the drain of the mosfet isn't square, it actually resembles something charging though why I have no idea.
The output of the 555 is square and a little under 200kHz. If the frequency is dropped by changing the timing cap to, say, 5kHz the waveform at the drain is square as you'd expect.
In the Smartscope attachment the green channel is the gate waveform, the blue is the drain waveform. Can anyone tell me what I've missed?
The output of the 555 is square and a little under 200kHz. If the frequency is dropped by changing the timing cap to, say, 5kHz the waveform at the drain is square as you'd expect.
In the Smartscope attachment the green channel is the gate waveform, the blue is the drain waveform. Can anyone tell me what I've missed?