Flyback Diodes for Dummies
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- čas přidán 27. 08. 2024
- DISCLAIMER: These videos show my way of doing things. Don't necessarily follow my advice, I could be wrong. You are responsible for your actions. Not me.
More for the automotive guy, but a basic demonstration of flyback and how to avoid it.
Thank you so much! I owe you few beers at the least. I have been chasing an intermittent issue with my arduino freezing when a relay turns on a small 6v pump. One little diode and the problem was solved. I appreciate a simple explanation. You also saved my sanity from not having to watch any more one hour videos about wave forms on oscilloscopes. Thanks again for the simple and brilliant explanation.
Thanks. Good demonstration. I used a flyback diode to stop the CLACK sound, on a restaurant drive-thru intercom system.
Most Bosch relays have suppression built into them, check the little schematic printed on the relay case. It will show either a diode or resistor. Both work well with the resistor slightly increasing the life of the relay load contacts vs a diode.
Correct, but those little Bosch relays max out at 30 amps, this one in video is a Cole Hershey type, they go up to 200 amp intermittent or continuous duty.
A good practical demonstration
Nice practical vid.
Another "101" is to never wear wedding rings (or any other kind of rings or metallic jewelry) when working with electricity, especially batteries. A ring can turn white hot in a fraction of a second when shorted to a battery. Not a pleasant way to start your day.
Thank you. I was looking for flyback across rf power transistors . I had forgot all about this application .
Thanks for the layman explanation… Now I understand… it help a lot!
One of the best video on this topic. 👍
Great video. Thank you.
Very good explanation!
Does the load side not experience the field collapse?
As a true dummy I can say this was not for dummies.
Im going to use a flyback diode for a diy wind turbine. Im using mc4 connectors for the positive and negative terminals to hook it up to my wattfun. Now a days they have mc4 connectors with diodes in them so im going to buy one of those for my positive terminal. That way i dont need a controller or anything just plug and play
fuse in series with diode is good idea too
This is true. I assumed of course that you are fusing your control power that feeds the coil, which I always do. Effectively the same thing, because yes, diodes do occasionally short.
@@mechtrician1 thanks for your reply!
Shouldn't these things be built in the contactor if collapsing a magnetic field and reverse voltage is that much of an issue?
Sometimes they are. A lot of control relays and contactors actually have a socket for a flyback diode built in.
This is more specific to automotive I am referring to here. Some relay kits have them built in, some don’t.
You need to make an informational video on how to properly diode protect your automobile so the average consumer can fight back as shoddy mechanics treating them as cash cows...The comments youll get will be overwhelming when you educate people in a manner that hits them with a hard reality and aids them with a simple solution that saves them mucho deniero..
Is this similar to a snubber circuit?
Similar except in a snubber circuit you usually have external resistors.
How would you calculate the needed amp rating for the flyback diode?
Probably easiest to measure it, but there is virtually no current in flyback.
And Ford wasnt the only scammer...Chrysler/Plymouth and Dodge was too with their Electronic Lean Burn, or Electronic Spark Control ignition boxes starting in 1972 that needed a ceramic resistor to control heat for their ECU's and those guys were hired by Ford years later.........Flyback in cars with fully loaded options especially with electric motion heated seats was their biggest enemy aswell........Why do you think so many C/P/D's used to die in the rain when everything was running full blast especially rearwindow defroster and front window defogger windshield wipers and headlights....Diodes in the right spots would of eliminated those issues..
Look up diode suppressed starter solenoids...Theyre out there..What do you think started the TFI module debacle Ford had? Years before they put diode suppressed starter solenoids to supress flyback that welded the points shut and blew out duraspark boxes. Then they stopped putting diode suppressed starter solenoids and failed to put diode suppression in the EEC also the fuelpump relays and blam the TFI debacle began and billions of dollars in TFI module were bought with Ford skating by with minimal classaction lawsuits......It was the Greatest Scam Ford Ever had....
Intresting