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One potentiometer to control the waveforms on two different MOSFETs. Colour codes needed for the pot, buck and boost converter ranges. Arduino's map() and constrain() functions employed. Oscilloscope testing with a tricky triggering problem. Final testing on the Muppet 2 breadboard - and ultimately, success 🙂
One potentiometer to control the waveforms on two different MOSFETs. Colour codes needed for the pot, buck and boost converter ranges. Arduino's map() and constrain() functions employed. Oscilloscope testing with a tricky triggering problem. Final testing on the Muppet 2 breadboard - and ultimately, success 🙂
NOICE! It's a keeper.
Very useful. Thanks so much.
Julian ?! ALT, ALT CHOP, ALT TRIG or ALTERNATE will trigger fron either channel. How long have you been using a scope?
Keep up the good work.
Mick T
i love my old valve scope, one knob pre function, looks like the dash of a space shuttle, change from trigger ch1 to trigger ch2 with one click…
Awesome work as usual Julian!
I would have loved to have seen your analog voltmeter across the lamp, to visually stimulate my 'geeky-ness' and see exactly what the muppet2 is outputting as you go through the ranges.
Cheerio,
Barry, from Canada
Will there be a DCOI v2 video? Is it still viable at all? It exists only to find a purpose for Non-LL Mosfets, isn't it? So people should just use an LL Mosfet in the first place, right?
You have a gap between the two ranges so your Uno doesn't know what to do between the two ranges as it passes from one range to the other.
It's probably clear anyway, but the first map function didn't drop its output to zero above 341 input. It just kept on increasing in proportion. So after 341 mapped to 01ffh it mapped 342-511 to 0200h-02fdh. The PCM generator just chopped off the top bits, effectively subtracting 0200h. That's why the constrain worked, preventing the output increasing above 01ffh.
Agree with the unnecessary '/2' but also am I reading this right, are you trying to assign a value of between 0 and 511 into an 8 bit register?
Hi Julian, great video.
BUT can you exercise the practice of TURNING your project OFF before disconnecting or reconnecting components. A bad example to new project constructors.
I had a potentiometer that started to smoke on me.
AAAH, I get it!, Basically what you are saying is that you don't get a brown pen in the Sharpie selection pack. Thank heavens I was not as confused as I thought.
Have a great day and many thanks for the videos,
Joe
when you say it should trigger on either of the two channels 'whichever is active' what do you mean by active?
this is a rhetorical question.
please stop calling them potties. it sounds horrible
Interesting stuff. It generates a high pitch sound when you have it in boost mode. The volume of which increases to a fairly unpleasant level at max boost.
great video again julian..