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The boost converter certainly makes the bulb brighter, but the DMM voltage goes DOWN as the bulb brightness increases! Also, the top of the flyback spike is clipped (or crowbarred) by the MOSFET. The solution is a 1000F capacitor on the boost converter output.
https://www.jameco.com/Jameco/Products/ProdDS/669951-DS01.pdf
Mustool MT8206 on Banggood:https://ban.ggood.vip/2mo4
coupon：12MT8206
Banggood12th anniversary page: https://ban.ggood.vip/2mo9
The boost converter certainly makes the bulb brighter, but the DMM voltage goes DOWN as the bulb brightness increases! Also, the top of the flyback spike is clipped (or crowbarred) by the MOSFET. The solution is a 1000F capacitor on the boost converter output.
https://www.jameco.com/Jameco/Products/ProdDS/669951-DS01.pdf
you make me subscribe
very good video
I love it
It is silly they still use "7-segment" display font for digits on graphical LCD. So silly.
Julian – Put some emi caps into the circuit. One next to the input cap, one across the output cap. Also for a super design you could add some common mode inductors and filter caps pre and post converter to really clean up the power and kick out noise.
The meter is reading RMS voltage so it's doing fine for what it's been asked to do. The circuit sort of emulates a PWM without the capacitor so it reads that but in (reverse?)? The lower the duty cycle, the lower the RMS reading.
typo in the description; it says 1000F capacitor instead of 1000uF.
I’m late for my comment, but here comes anyway: Your volt meters are measuring the average which is dominated by the FET conduction pulse width. If you had a true RMS meter, it would weigh in (like as a square) the transient portion and would increase just like the light bulb intensity. In that respect, the light bulb also responds to the true RMS.
Julian, would have been interesting to see what a moving coil analogue meter made of the output voltage.
Do you still own any (I’m presuming that you had one in the past… mainly because my first multimeter was a moving coil analogue type…).
a great proof of concept
crowbar! I've heard that term for years and sort of had an idea what it meant. So what does it actually mean and where did the name come from? is it from the pattern you are seeing there on the scope?
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learnful
What is the influence of the inductance of the coil to this whole thing? I simply can't imagine, that it doesn't matter.
11.34 volts spells out HELL.
I believe that symbol for the MosFET body diode is a zener, which explains your clamping.
Realy enjoying the muppet show, thanks Juian.