This is where I put to test my crazy ideas in DIY Electronics & Robotics and my understanding of basic Science. In the process, share the ideas and knowledge with the like minded, learn stuff myself and have a bit of fun too.
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I never got this to work. I have 1000:1 CT coil and 0.1Amp Load (1 Volt Source, with Rload = 10). I wanted to measure mA so I used 1000kOhm resistor on the coil side and tested with a DC source. When I measured the burden resistor across the coil, it always read 0.0mV even if I switched current direction. Testing 1 amp or more on 18VDC is problematic as I need a large sandbar resistor and I want the sensitivity to be greater than that.
I don't believe the high voltage is used to steer the electron beam. The high voltage is necessary to create the electron beam, and lower voltages are used to create the magnetic field that steers the beam.
At about timestamp 2:40 where you show the B-H curves for different materials, I have two questions please: 1) WHAT WOULD THIS LOOK LIKE FOR AN AIR CORE?? 2) CAN AN AIR-CORE COIL SATURATE?? Thanks so much for the BEST videos and explanations on you-tube!!!!!
Excellent explanation... ❤❤❤ This channel is really underrated ... And I don't see any recent videos uploaded here. Please make more videos . Time will prove that your channel is worth watching.
Hello can that flyback transformer being used to stabilise voltage in sensors or phase shift electricity? Is it posibel to re use those pins? My problem is an small AC generator inside distributor so I need kinde of phase shifter I have problems running engine in low rpm ranges so kinde of need help about pick up coils.
Nice. These flyback transformers are used in the production industry of bottle filling. They put the HT onto a copper array on a double sided PCB that is sandwiched between two heat sinks. The heatsinks are grooved so that air passes through the grooves and over the HT on the PCB array. This ionises the air and produces O3, which is Qzone. Ozone being very reactive is apparently good for killing germs. "With 52 percent more oxidizing power than chlorine, ozone will oxidize both organic and inorganic substances; remove unwanted taste, odor and color; and provide effective disinfection." - Spartan water treatment Really the only difference between yours and an Ozone generator is a current ammeter and a pot to adjust the switching so that the amps can be adjusted. I cant remember how much it drew but it was basically always set at max to whatever the Flyback transformer was capable of producing.
First and foremost: I love your video. It is one of a few that explain the basics not to mention presentation of the waveforms and impact of component level modifications. Keep up the good work man, this is the kind of videos that make YT a better place. Having said that I have a question: is there a way to limit the current consumption on the primary side? I want to build a HV generator for different purposes (electrostatic precipitator). I need output voltages in the range of 10-15kV but no arcs are intended, ever. I understand that the current consumption on the primary side is a function of input voltage and primary circuit's resistance. I also know that transformer's input resistance under load is a complex thing involving coil resistance plus inductive reactance. Now question: is there a way to reduce the current flowing through the primary without impacting the output voltage? An extra resistor in series, somewhere, perhaps? I don't care about the output power, I only care about output voltage. Thanks in advance for any further guidance!
It is so helpful video..I want to make a variable high-voltage power source can I use this by varying input voltage or changing the capacitor C1?? and can you please share with me the full info on c1 And MOV?
MOV and C1 are just there to ground any high voltages that may find its way back to the source. I was experimenting and tend to make some silly mistakes. So didn't want that to damage my power supply. Later I learned from my mistake and just used C1 and MOV just in case. Not critical if you are using carefully.
N number of turns clockwise. N number of turns counter clockwise. The junction is formed by the end of coil 1 and beginning of coil 2. Hope it is clear. It's almost like pedalling a bike. For one half turn the left leg will push the pedal. For the other, the right leg will push the pedal.
Thank you! It was a bit hard to tell and I'm new to this stuff. Not about to try anything truly dangerous yet; I want to learn a bunch more first. @@TheKnurdLab
ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-T5Q9pLxeoss.html will this pulse or just oscillate when using DC ? anyone?? I know it will oscillate with AC but i want use DC or better said i want it to pulse and not oscillate, as to say i want the Capacitors to act as a switch. Any input is welcome.
This is an excellent explanation of this particular flyback. I've got one I got from somewhere I don't remember anymore and this is one of the few videos actually giving a comprehensive explanation of it. Thanks!
@kanchanmisra2979 May be you have got the windings (pins) on the flyback transformer wrong. Please check the windings. Different models of transformers have different types of connections.
@@TheKnurdLab I'm using the same model u wrote on ur notebook i.e. bsc... 1010A I'm using pin 2 and 3 as primary and 7 and 8 as feedback. I'm using 2W 220ohm and 20ohm resistors. Ps can u give me ur whatsApp no. I have to making this as school project pls pls pls pls pls 🙏🙏🙏 Ps2 I'm a boy
Please check if you have wired the transistors properly. Emitter, Base and Collectors. Refer to the datasheet of the transistor and find out the pins. If they are wired right, then check if the transistor is working. You can do a basic transistor test with a multimeter. Google it. If you don't know electronics or electrical basics, then I would advise not to proceed. The voltages involved are dangerous. It can be fatal. Follow the safety protocols or work under the guidance of a trained professional. I would advise not to proceed if you don't know what you are doing.
@@samueldavies646 @samueldavies646 No, even if you take the cores out they push snug together. Although I have seen one now with a definite gap (microwave inverter). The question remains as to where the "gap" exists if it actually microscopic gaps within the structure of the core? but thats not an "air gap".
i have taken apart gdt, smps transformer, crt tv flyback,and many others and most of them had a definite air gap. if it has an air gap it will be a definate gap.@@xONEWINGx
The diode's role is a significant part of the high voltage that is generated by the flyback. You must not forget to include it, and you must know the polarity direction needed to prevent the Secondary winding from giving up its massive energy too soon. 1) during the time the primary winding's current is increasing, if the diode is *_FORWARD-BIASED_* for the secondary circuit, the energy is drained away into the secondary circuit, and you do not get the same high voltage spike 2) instead, while primary current is increasing, the installation of the diode, its polarity, is such that it is REVERSE-BIASED to eliminate any path for the energy in the secondary winding to couple into the secondary circuit, ie. the diode tells the magnetic field and particularly the gap magnetic field, where more energy is stored compared to a non-gapped core - "STOP, YOU BUILT-UP ENERGY IN THE SECONDARY - YOU CANNOT ESCAPE, I AM HOLDING YOU RESTRAINED" 3) when the primary winding's mosfet (or bjt or other) switch is opened, NOW the diode in the secondary circuit becomes forward biased and the 'canned-up' energy in the secondary now has a path to flow into the output circuit *ANALOGY* - a tall dam wall, called "The Diode", holds back a very deep body of water piped in from a deep lake - at a specific time, Mr. Primary says "Release the stored energy" and the diode dam wall opens and the stored energy flows suddenly - if the dam wall 'Diode' was missing, you could pump all the deep lake water you want, but you will not get a sudden, massive spike of water energy .
Thanks for the video. I am an electronics technician who cut his teeth on TV repair. I have been in telecom manufacturing for the last 23 years, and forgot how all the old crt tech worked. Thanks for the refresher.
Thank you for posting one of the few if not the only detailed explanation of a high voltage power supply using a flyback transformer. Your excellent "Engineer! Experiment! Educate!" approach inspired me to review the circuit in more detail. As I found, the circuit oscillates not because of primary and secondary winding voltages but because of the current limitations of the transistor. The transistor operation has 3 modes: saturated, active, and off. When the transistor is saturated, Vce is 0 volts, and the voltage across the primary inductor is fixed, equal to the supply. The primary current rises by V = L di/dt. Eventually the rising collector current exceeds the capacity of the transistor to remain saturated. It enters the active mode. Vce increases, forcing the voltage across the primary and the primary current to drop. Magnetic flux drops, secondary current drops, the transistor base current drops, and the transistor turns off. With the transistor off, secondary current flows through diode D1 and resistor R2, and the primary current flows through capacitor C1 and the power supply. The capacitor and inductor resonate for less than a full resonant period until the capacitor has discharged to the extent that Vce has fallen to a level where, with primary and secondary current, Q1 base current again flows, the transistor comes on, first in active mode then in saturation, and the oscillation cycle repeats. I will continue to experiment with the circuit to improve its efficiency and raise the output voltage. Thanks again!
Great video! Thorough and informative. Would you please explain the difference in time bases, top and bottom, in the signal graphs, such as at 3:08 when you display the capacitor and VBE voltages?
Please look at the bottom left hand side of the graph. The legends with their respective colours are explained as to which axis represents what. Thank you for your kind words.
Thank you for your quick reply! Understood, the vertical axes are well-labeled. For the horizontal, it's safe to assume then that both signals are on the same time base, 5 microseconds per division, and that the top axis is not in time at but in some other units of measure denoted by "m". @@TheKnurdLab
There is an excellent tutorial by Fuji electric on this topic. You may search Google with the keyword "fuji electric Fly-back transformer design instructions"
