Build a really simple shotgun shell night light that turns on with a flip!
Do not try to do this with live ammunition! The shotgun shells used in this project were empty casings!
Step 1: Materials
- 1 paper shotgun shell
- 1 transparent plastic shotgun shell
- 1 tilt ball sensor/switch
- 2 bright white LEDs
- 1 3v button cell battery ( I used a CR2032)
Step 2: Tools
- Soldering iron
- Exacto knife, scalpel.
Step 3: Basic Construction
I was messing around with some old shotgun shells when I found that the metal casings would hold a 3v button cell battery perfectly if I removed the paper tube. Since the positive side of the button cell battery wraps around the edge of the battery I could place the battery inside the metal casing without it shorting out. I used bright white LEDs since normal ones could not emit enough light through the green plastic. I also tried green LEDs which worked quite well, but not as well as the bright white.
Step 4: Preparations
To remove the tube I had to drill out the compressed paper, soaking it in water, drilling again, cutting... When I was done I was left with this metal casing. This is where the battery will sit. Cut off the folds on the end of the plastic casing.
Step 5: Circuit
This is the circuit. It's a bit messy but it works. The LEDs are connected in parallel to the cylinder of the tilt switch which is then connected to the negative side of the battery.
Step 6: Building
I soldered the positive side of the LEDs to the shell casing and positioned the tilt switch node where the battery's negative side will be. The pictures show how it works; the tilt switch closes the circuit when it's turned right side up. When it's turned upside down, the tilt switch is open = the lights turn off. The primer acts as a part holding the battery connection in place.
Step 7: Aesthetics
This is what it looks like when I place the plastic casing oven the circuit! The plastic casing fits snuggly in the metal casing! It sort of looks like a huge fuse.
Step 8: Finished
This is what it looks like! When I flip it, it turns on and gives off a soft green light. Perfect for a night light!
Step 9: PS. Thoughts...
It's been a few days since a built this now and I've come across a tiny problem. The tilt switch doesn't have a very good connection to the battery so it will flicker a bit. I soldered a small spring to the tilt switch to make a better connection and now it works fine. :)