LED Wine Charms
Intro: LED Wine Charms
STEP 1: Materials
The LEDs were from an assortment I bought from American Science & Surplus - your basic 1.7V to 3V red, orange, green, white/clear LED.
The 100 & 200 ohm resistors were from Radio Shack.
The 25mm Beading Hoops were from a local bead store and cost $4 for 10.
The only critical component are the batteries, which need to have leads pre-soldered to them at the factory. The 3V lithium-ion batteries were from Mouser (Mouser part #658- BR2032-1GU,mfr part #BR2032-1GU @ $2.32 ea).
STEP 2: Wrap the LED Leads Around the Beading Hoop
We'll start with the simplest case, a LED that doesn't need a resistor.
Use some needle nose pliers to hold the led & hoop in place while you wrap the leads. It'll be less strain on the LED.
STEP 3: Solder and Cut Away Excess Leads
Careful you don't melt the LED. You could attach an alligator clip to each lead as you solder it to act as a heat sink. I learned this after melting a few LEDs.
STEP 4: Prepare the Battery
The critical part is that positive and negative leads are welded to the battery at the factory. Don't try to solder directly on a lithium-ion battery yourself, it might blow up in your face.
Follow along in the photos...
1. Unmodified batteries.
2. Bend one lead over.
3. Flatten the other lead.
4. Bend one of the skinny leads down.
5. After bending one of the skinny leads.
6. Cut off the excess.
7. Bend the lead back up.
8. Ready for use.
STEP 5: Solder the Hoop to the Battery
Figure out the which way lights up the led and bend a hook in the end you want to solder to the battery.
Solder it, trying not to heat up the battery.
STEP 6: Make a Latch/switch and You're Done!
Bend another hook on the other arm of the hoop. Hook it in the bent lead of the battery to close the circuit and light up the led.
STEP 7: Add a Resistor for Yellow and Red LEDs
Red & yellow LEDs draw too much power from a 3V battery and reduce battery life.
I used some 100 & 200 ohm resistors I had handy.
Wrap the resistor around one lead of the led, solder it, and snip off the excess.
I put the resistor on the lead that would later be soldered to the battery, thinking that would put less strain on it.
STEP 8: Wrap the LED & Resistor Around the Hoop, Solder, and Snip Away Excess
Solder to the hoop just like with the LED without a resistor.
Then attach to the battery in the same way as before.
16 Comments
AngryRedhead 14 years ago
Great idea!
billr 14 years ago
They should be very handy at New Year's parties.
Now if I could only figure out how to make them blink...
- Bill
beverageexpert 13 years ago
nimitz 14 years ago
I did come up with a thought though - couldn't your use the smaller 3v (1cm) coin batteries and a surface mount LED and tape them to the underside of the base? That would put them shining directly up the center of the glass.
dani19cz 13 years ago
billr 14 years ago
- Billr
nimitz 14 years ago
http://www.ramseyelectronics.com/cgi-bin/commerce.exe?preadd=action&key=BL2
The nice thing is that they're small AND bright for the most part. :-)
godofal 14 years ago
u should, however order 2 or 3 leds/resistors if ur making 1 (dont count up like that, if ur making 10, order 15) since ul lose them very quick, even with a clean floor/workingspace...
and btw, leds always need resistors, even the green ones! u just need to calculate the right resistor, some only need 50ohm, while others can go to 300ohm
just google it, there are plenty of online calculators to use, instead of manually doing it urself ;)
and maybe add a tactile switch faced down, so the led will light up when the wine glass stands on the table, and goes off the second u pick it up :)
il try to make one of these when i get the chance, make some pictures and upload them
nice idea, nice projec!
jenjenbug 14 years ago
billr 14 years ago
- Billr
hot-fresh-rider 14 years ago
billr 14 years ago
- Billr
sffitzge 14 years ago
but i was wondering if you had tried it without the pre-soldered leads and if u had if a 1.5V button cell battery will light up the LEDs well enough or if you have to go with a 3V battery
billr 14 years ago
http://www.evilmadscientist.com/article.php/throw
, which says red & yellow leds require 1.7v and green & white leds require 3.5v.
I didn't try the 1.5v batteries, though. I'm sure that 1.5v batteries are available with pre-soldered leads.
Another option would be to use a battery holder and solder to that. I would appreciate a link to where I could purchase battery holders for a CR2032 3V lithium coin cell battery.
- Bill
agbert 14 years ago
Andrew...
billr 14 years ago
Heat shrink was the first thing I tried but I didn't like the way it looked.
- Bill