Pitch darkness mixed with insobriety has its problems; falling down holes, bumping into others, losing track of your beverage etc. ... this beerlight is designed for night- time outside parties where the only light is from the bonfire.
It easily clips onto each new beer can, with a red flashing led positioned next to the drinking hole and a bright white led at the base to facilitate finding dropped lighters, keys and contact lenses.
I've been to few of these parties recently and like most people on this site I imagine, I am overly prepared for most situations but most of my friends aren't , so I made a pair of these for my hosts; they enjoyed them immensly and could be seen randomly wandering around by their flashing lights.
So, this is a novelty item but it does actually work; throwing a nice shaft of light onto the user's walking area when they need it and ensuring that they will not lose track their precious refreshment.
Step 1: Parts.
Flashing red led.
Bright white led.
Small push to make switch.
Three button 1.5 batteries.
Wire. (I used lacquered wire from some discarded Christmas lights).
Bicycle spoke or stiff wire.
Gaffer tape or duck tape.
Step 2: Step 1.
2nd photo- Bend it with pliers to bring it roughly parallel with the side of the can.
3rd photo bend it under the can.
It needs to have enough spring to actually grip the can; and to be able to be taken on and off a can easily.
Step 3: Step 2.
What I do know is that an led will only work one way around but will not be harmed if it is placed the wrong way around.
One leg is longer than the other and I found that the longer leg needs to be attached to the positive end of the battery.
You can be sensible and keep track of which wire is which or, like me, use the frustrating method keep trying them each way until they work as you go along.
1st photograph- Solder the wire to the short leg of the red led, leaving enough to reach from the top of the spoke to about halfway down.
2nd photograph- With the long leg, first solder this resistor to it, (see 2nd photo), and then solder the wire to that.
3rd photograph- Tape it to near the top of the spoke.
4th photograph- Solder the white led to two wires that will each reach from the base off the can to halfway up the spoke.
5th photograph- Tape the white led to the bottom of the spoke, positioned so that it is facing upwards into the centre of concave base.
Step 4: Step 3.
Tape this onto the spoke, about halfway up, with the ends still open.
Step 5: Step 4.
Tape this switch onto the spoke some where just below the battery.
Step 6: Step 5.
Tape them firmly in place.
Do the same with the remaining two wires but onto the positive end of the battery.
(This has to be taped on just before you start the evening unless you go to the trouble of soldering in another switch.)