Wireless Inductive LEDs
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- Опубліковано 23 сер 2024
- Everything is made better with LEDs, right? They make things sparkly, and can be a useful visual feedback mechanism. Some time ago, I investigated an RFID tag that had a built-in LED which was lit when the tag was read - energised by the electromagnetic field as it was brought close to the RFID reader, as found in Skylanders "Lightcore" figures. However, I found that approach was somewhat flawed, and also unnecessarily complicated when all you wanted was an aesthetic effect, not linked to RFID identification.
Fortunately, that's where these wireless LEDs might just help - they're much simpler, passive components that are powered solely by induction from a nearby coil. They're small, cheap, can be embedded in 3D-printed parts, resin, or any other props, and never need to be accessed. They have a range of up to almost 40cm from the transmitter coil, and you can even make your own using simple discrete parts!
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I had jars of sprinkles that are scattered around the room that you need to collect and place on a shelf. I couldn't figure out a reason why you would need to put them in order. Then I discovered these lights. I superglued a ring of these inside each jar. Unless you look really close, you don't even notice them, but when you put them on the shelf, they "magically" light up a color. It's a really cool effect, especially since this particular room is geared towards families.
Oh, that's a lovely implementation!
When I first learned that these existed, my first reaction was to run to Amazon and Etsy only to be disappointed that apparently nobody was selling resin-cast dice with them embedded inside. Hide the coil in a dice tray and I think you'd have a pretty neat setup for your tabletop sessions.
Omg I was thinking I had no use for these, but this is perfect.
Okay, I've committed to this - I've got LEDs, resin, inks, mica, molds and various accessories on the way. I'm going to make this. I can let you know when I have something working if you want. It's going to be experimental and I have no idea how fair the dice will be, but I'm going to figure it out.
@@excrubulent Same here bro. Gonna make some resin keychains with these.
Disney imagineers had made a 3-coil setup with full bridge rectification so that regardless of the orientation the LED would light up
Nice! There's a couple of snazzier circuit modifications I've considered: e.g. you could have several LEDs coming off the same inductor coil, each with a different value capacitor acting as band pass filters. Then, if you adjusted the oscillation frequency of the transmitter coil, you could selectively light up, say, RGB LEDs independently.
Or, you could put different capacitor values on each LED to activate them sequentially in a chase sequence.
@@PlayfulTechnology Bootleg delay timers
I'm currently building a room with some DnD properties, and I think I'm going to 3d print some dice with clear filament, stop mid-print and embed these in the centre of the die. Then they have to throw them through the loop to see which die relates to which colour
Funnily enough I ordered some of these earlier today and this video just came up on my UA-cam suggestions 😂
Hopefully in a few days I'll get to have a play with them!
Cool feedback application! My one idea is to use multiple sizes with a wand / divining rod and you could even use it as a meter that "grows" or "charges up" in strength as you get closer (5mm works further away, then 4mm as you get closer)
Looking at that large coil I want to make a game where things need to go through that hoop and they will light up when traversing. Haven't figure out what to do with this effect yet
When you talk about when the LEDs light up vs when the RFID tag is recognised, what about an arduino or similar that can read the RFID tag and only power up the coil when the correct item is placed on? It wouldn't have the cool proximity-fading-in effect, but it would still work as feedback. Also if you still wanted the fade-in, you could ramp up the power when the RFID is detected.
Very nice! It would be extremely interesting if you could do the same project but on a larger scale.
Let's say a shelf 1 meter long and 20 cm wide, and each glass that would stand on the shelf being illuminated by a led.
What electronic parts would be needed?
Thanks for sharing! All the best!
Just ordered a huge batch of these from your Patreon Link! Thx
Sound like this could be used to measure a distance ?
So how do you power the coil? What pcb are you using? And what power supply? :)
I just found your yt channel and you earned yourself an instant sub :D
It's just a 24VDC supply into a IC that generates a square wave at a frequency matched to the LEDs - there's barely anything to it.
How many turns in thr coil?
Atomic14 channel has a great video about how to make those 👍
Ive been struggling with the brightness should a 24v adapter enhance the range and brightness?
Seems a bit weak and over complicated :D Lectenna can be cut for specific frequency. Mtech Industries resonator has range of several meters.
Would you reveal the name of the driver board ? It is a great idea. I will create a puzzle with that i think 👍 thanks for your great videos
I'll make another video specifically about how you can create your own driver board, but for now: imgur.com/a/s9QzJ3J
fun nice
Woww, it's cool! Does anybody know what the name of the driver is? I would like to buy it separately (as cheap as possible :D), and make custom coils so the leds only light up at a small place.
Also, turning the coil on and off via a mosfet would be pretty cool, as it could become an even more interactive prop
imgur.com/a/s9QzJ3J
First 🔥🔥🔥