Educational-style videos about electronics, microcontrollers and various other technical subjects. Information will be useful for both beginners and professionals. Enjoy!
I have been taking apart quite a few of those recently though i came upon one of those draw sensors that has 4 connectors. Have not totally figured out yet what the 4th one is for As far as i can identify them, one wire directly from the battery +, an other wire connected to the charge/control board, oddly also labeled '+' and 2 wires going to the spiral. All a bit odd but i am confident i will figure it out
Maybe the one that goes to the charge board "+" just monitors battery state and duplicated the other +. With integrated circuits you never know ))) Yeah, in my life I understood that if you really want to figure something out, sooner or later you will do it. So, never give up :)
this is a very cool lamp, nice job ! Hower I would have put the pin slightly off centered on the fork to create a place (by covering a part of the contact on the mount) where the lamp is off with the fork still on it's mount
Thanks a lot, maybe it would have been better. I just found fork center of mass and drilled holes there (also, it was the thickest place of the fork. Otherwise magnets would not fit inside xD )
i didnt know how much i needed to hear "dont take the first bolt you see, it might have low permeability and your magnet will suck" right now. thank you
This video was very helpful, just a quick question. I'm doing an electromagnetic levitation project. How do I alter the electromagnetic force equation to take into account the distance at which that force is experienced
You should consider the distance to the object as an air gap. So the distance (gap) affects effetive permeability. There should be formulas in the internet which show how to calculate effective permeability of the material with the gap.
Awesome perspective, you really get into the detail rather than just having to copy/paste and install libraries. It's rare to get a less entry-level approach
Wow, you should patent this design, for sure! It looks amazing 😻 I’ll definitely buy one, if it will be available Great video, I didn’t even know about the electronic signals from focus ring 😅
Awesome job explaining! Thank you. If you can learn the basic fundamentals and principles it will go a long way. My road to the electromagnet was much the same. You can go crazy learning too much. Maxwells equations. Yuck! Right-hand rule, force, magnetic field, flux density, permeability. Oh, yeh, total saturation. Then when you finally get it, you better learn some thermodynamics. The heat is an issue. Heat dissipation. Respect the current or Amps you need. Very fun project. You can learn much.
Thank you very much) Yeah, it is a long journey. When you think you understand how something works, there are some new variables pop in and change everything))) But, nothing is perfect and it is better to have a non-ideal solution rather than a perfect plan)
Very nice, and learned some bonus things I didn't expect. I would have tried to use Photoshop's reduce colour depth tool to convert to 1 bit, with dithering. Not sure if that would be nicer, or it might give you a noisy, pixelly animation.
Hello I'm using it on a blue pill stm32f103c8t6 but while compiling it gives an error about #include <_ansi.h> doesn't exist. I'll be glad if you help me with it
If it is the only problem, just download ansi.h header file from a github and include it into the project. ansi.h is a universal file so probably any should do the job
With a 550mah lipo battery, and around a 2ohm resistor coil, how are they getting enough power to the coil to sufficiently heat up? I am taking apart a vape myself and it has the same characteristics.
Capacity of a battery has nothing to do with a power it can deliver. Some li-ion batteries can deliver 1C current, which is 1Capacity (for the 550mah it would be 550mA current) and some can deliver up to 10C and way more for a short time. It depends how battery was designed. Speaking about the power. So we are talking about 3.3-4.2 Volts from a battery across a load of 2 Ohms. Current would be around 1.65-2.1 Amps, which gives power output of current^2*Load = 2.1Amps*2.1Amps*2Ohms = 8.82 Watts!! So that is the highest power that such a battery can deliver to the load of 2Ohms (if there is no other circuitry that boosts battery voltage to a higher level. Usually there are not). And almost 9 Watts is a CRAZY amount of power. If there is a current controller in the device, which directly controls the current through the coil, limiting it, current should be of any value and power and heat generated by a coil can be controlled. But yeah, definetely 1 battery can deliver enough. Hope this answears your question
Hi !It's very impressive work you did !I want to make it but I have a different board (STM32F411E_Discovery).How to import it for the chip (100pin STM32F411VETX) I have?
Very interesting. I watched this video because I routinely disassemble Vuse Alto vapes (because I have a ton of them). I harvest the lipo cell, magnets (awesome magnets) etc from them. But what I really wanted to do is use the actual Vuse control board to act as a 1S protection/charging board for use with the cell in other applications. I figured I could "go around" the air sensor and perhaps connect these wires to an off/on switch. In this way I wouldn't need to purchase separate 1S protection boards to use with the cells. With the coil totally disconnected, I was unsuccessful trying to simply bridge the full voltage going into the sensor to it's sensor voltage out (which I thought would make it turn on the power/LED). The Vuse board seems like it's a little too complicated of design to repurpose into a simple under voltage/over voltage board. Especially if it would cut the voltage to the output after a set amount of seconds. Pity to waste these nice looking boards. I suppose they would at least serve as general lipo charging boards. Unfortunately, without undervoltage protection, I can't really use them in projects.
Feel your pain. That is the problem of all application specific integrated circuits. They do work very well in the applications they were designed for. But it is somehow difficult to use them in other applications🥲
Can anyone help me understand how to simulate a magnetic field as demonstrated in the video? Is this being done using a specific software or some kind of programming?
Excellent, I have learned everything about electromagnet in this video. Very good way of explaining. Thank you so much. Have a beautiful day, greetings from Cordoba, Argentina
To make assembling more fun and always cut wire with a right color) But for real, cause my non regulated power supply had a current limit and coil resistance was too low to stay below the min current level. So power supply current protection was turning off the power supply. Thus, I had to put limiting resistors)))
Calculate and you will find out that many turns of small diameter wire or fewer turns of larger diameter wire in the same volume will give the same Force.
BUT WHAT IF YOU HAVE A 10 V BATTERY IN SERIES WITH A SMALL 1 mV ac SIGNAL??? AND OUT A CAPACITOR AND RESISTER IN THE SERIES CIRCUIT. CURRENT ONLY GOES ONE WAY --- CORRECT ?????? IT'S A FLUCTUATING DC CURRENT---- CORRECT ??? SO HOW DOES THE CAPACITOR DISCHARGE. I CAN SEE HOW IT WOULD CHARGE UP WHEN VOLTAGES ARE APPLIED. BUT HOW THE HELL DOES THIS THING DISCHARGE ??? IF THE CURRENT ONLY GOES IN ONE SOLE DIRECTION, HOW CAN THE CAPACITOR CHARGE AND DISCHARGE IF THE CURRENT ONLY GOES IN ONE SINGLE DIRECTION ? HOW DOES THE CIRCUIT WORK ??? I CANNOT FIGURE IT OUT. I'M STUMPED AND STUCK ON STUPID.
If you have 10V DC + 1mV AC, then capacitor will charge up to 10V and voltage fluctuation at it is goind to be those 1mV. Current still will be flowing in 2 directions, caused by that 1mV AC signal. For example to get from 10V to 10V +1mV capacitor has to be charged, so current has to flow in one durection, but for it to go from 10 V to 10 V - 1mV, it has to be discharged, which means current has to flow "out of it". Good luck)
@@NickElectronics OH, YES. I SEE NOW PERFECTLY. BUT WHAT IF YOU HAVE A NPN COMMON EMITTER AMPLIFIER CONFIGURATION WITH EMITTER RESISTOR AND EMITTER BYPASS CAPACITOR. NOW, ENTER AMPLIFIER CURRENT ONLY FLOWS ONE WAY THROUGH THE TRANSISTOR. AND IT'S A FLUCTUATING DC CURRENT. SO HOW DOES THE EMITTER BYPASS CAPACITOR CHARGE AND DISCHARGE. I CAN SEE WHERE IT CAN CHARGE ON ONE HALF CYCLE THE SINE WAVE, BUT WHAT IS THE PATH OF DISCHARGE ??? THE CAPACITOR IS PUT THEIR TO SHRUNK OR BYPASS THE RESISTOR CORRECT ?? YES I THINK THIS IS CORRECT. SO NOW HOW DOES THE CAPACITOR CHARGE AND DISCHARGE. IT CANNOT DO BOTH THROUGH THE TRANSISTOR. CURRENT ONLY CONDUCTION ONE DIRECTION THROUGH THE TRANSISTOR. I'M NOT COUNTING SMALL LEAKAGE CURRENTS OR EXTRANEOUS CURRENTS. JUST A BASIC TRANSISTOR AMPLIFIER. AND INDIES CONFIGURATIONS WE TAKE IT TO CURRENT ONLY GOES TO THE TRANSISTOR IN ONE DIRECTION. ELECTRONS GO FROM EMITTER TO COLLECTOR IN THE NPN. SO IF THE CAPACITOR CHARGES THROUGH THE TRANSISTOR, WHAT IS THE PATH OF DISCHARGE ???? DOES A DISCHARGE THROUGH THE EMITTER RESISTOR ????? THIS ALL SEEMS STRANGE TO ME STUMPED I AM STUCK ON STUPID. I SIMPLY CANNOT FIGURE THIS OUT. ☹️
Congratulations! This is the first near correct description I have seen of these capacitance pressure sensors. So many think they are just a contact pressure switch! They are based on the simple electret capacitor microphone mechanics. But instead of the usual audio pre amplifier chip in the mic application, these devices have a very clever asic chip. It applies a continuous AC signal 24/7/365 at low power level across the diaphragm foil to ground. You can see it on an oscilloscope. I have a capture of this but can’t attach it here. That ac signal enables minute changes in capacitance to be detected. It is essentially a modified mic capsule.
@@NickElectronics At first thoughts, it seems like an overkill way of controlling the heater in these things. However, they seem to work very reliably under all conditions. A simple mechanical pressure switch would be notoriously unreliable and very dangerous if it stuck on! It’s also great for the folk (like me) who collect used discarded vapes to salvage the Li-ion batteries. The clever little asic stops the batteries from becoming over discharged as it cuts out at around 3V then flashes the LED. I agree disposable vapes are crazy wasteful, and are littering our environment.
@@ThePrawlin Agreeing that disposable vapes are incredibly wasteful. Also, I believe that in China, such a sensor costs almost nothing, especially considering the huge quantities they produce. So, definetely not an overkill )
I've been trying to do some simple examples from RU-vid with arduino, but the guys must be using some library i can't find, i seem to get compile errors, and can't find what is needed...i think that i'm better to use stm32, even the black pill, with STMCube IDE, better integrated...
I provide formulas in the video. Resistance is only one parameter and usually process of magnet design is iterative process. Cause there are different limitations: resistance, as you said, magnet peak temperature, space limitations, its power etc. So you do calculations, check wether some parameters are out of tour limits, then recalculate it. Resistance of the wire in reality is a bad thing and preferable to have it as low as possible, but this increases wire thickness and forces you to use more complex control of the magnet. So for magnets you can buy online, resistance is used for limiting peak current as well. In such case by changing applied voltage, peak current and magnet force can be changed
