Simple Light and Sound Circuits - Electronics with Becky Stern | Digi-Key Electronics
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- Опубліковано 5 вер 2024
- Learn to build simple circuits for light and sound without the need for any code or programming. Becky Stern shows you how to hook up some LEDs to a battery pack, and also a simple circuit for playing audio.
Simple Light and Sound Circuits Blog - www.digikey.co...
Product Links:
3V Through-hole LEDs - www.digikey.co...
Through-hole resistors - www.digikey.co...
3x AAA Battery Pack with switch - www.digikey.co...
Multimeter - www.digikey.co...
Heat shrink tubing - www.digikey.co...
Stranded wire - www.digikey.co...
Audio FX board - www.digikey.co...
Speakers - www.digikey.co...
Tactile switches - www.digikey.co...
Solderless breadboard - www.digikey.co...
Solder-type breadboard - www.digikey.co...
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Rare example of a big distributor publishing a useful and enjoyable content for beginners, I hope you'll keep it up! 👍
I didn't know till recently, and I'm 66 and knew of Digikey in the 70s, it was started 'by and for' electronic hobbyists. Here's a line from Wikipedia, "Founded in 1972 by Ronald Stordahl, its name is a reference to the "Digi-Keyer Kit", a digital electronic keyer kit that he developed and marketed to amateur radio enthusiasts. He continues to privately own the company."
So glad you like it! 🙌
Because others are waiting in line to borrow Becky 😇
2:30 Great explanation of why LEDs should each have its own resistor!
We need more videos like this! Great job Becky!
Great tutorial, and I dig the nail art ;)
💅😎
😅✌🏼😎
The coolest, thank you for this!!
Very very good madam
The company SELTECH has some good speakers on Digikey.
This series is great, so *please* don't take this personally. I think educators need to be more careful with the statement at 3:20 "Electrical current takes the path of least resistance."
This is a very common statement, indeed almost common-knowledge, and is taught in schools, but it is misleading in the sort of way that can stick with and misguide a person for years. (ask me how I know!)
And especially in this example of parallel LEDs, where it seems very clearly demonstrated.
Unfortunately, I don't know how to summarize it briefly other than to suggest it's more like the flow of a river or stream.
Current flows through *All* possible paths, just like a river flows around boulders and islands, and even trickles through beaver dams.
Those LEDs are all getting current, but because one has a lower voltage requirement to turn on fully, it sets the voltage going into all the others, which is lower than their voltage requirement to visibly light up. (This actually can be seen with some LEDs, which glow *very* dimly, but visibly, at voltages far lower than their official "turn-on" voltage).
It's like three side-by-side beaver dams blocking a river. One is shorter than the others, so the water flows over its top, but the other two still allow a trickle through their branches.
The reason this is important, especially here, is because it's not the "resistance" we're talking about, it's the *voltage.* And equally important is that current doesn't merely choose the easiest path.
The /majority/ of the current flows where the river is the deepest. Far less-so where it's shallow at the banks, but it *does* flow near the banks, and around both sides of islands and boulders, and over shallows, and under fallen logs, even though all those things add resistance to the flow.
However, it doesn't flow *over* the banks, nor *over* the taller beaver dams, because the water level (the voltage) isn't high enough.
I think someone smarter than I could figure out a better way to say this... The other is easy to remember, wordwise, which is why it's so commonly taught. But except in very rare circumstances (like parallel LEDs), it is rarely true, and thus misleading.
A far more accurate analogy, I think, is very difficult [for me] to summarize, but I think it makes a lot more intuitive sense, based on many examples we see in real life. So, actually, it should be easier to grasp than to rewire one's brain to thinking somehow electricity goes against real-world experience in other realms (like water or wind flowing).
We just need a snappy way of saying it!
Maybe we can just say "paths of least resistance"... I always found it so interesting that the water flowing analogy applies so well to electrons, the micro so neatly matching up with the macro... appreciate your thoughtful comments!
Great video. I heard that sound a lot 4:46. Does anyone happen to know what this sound is called?
It's an airhorn. 📢