Introduction: Flat-pack Explosive (squib)
- THIS INSTRUCTABLE INVOLVES HAZARDOUS MATERIALS.
- OXIDATION HAZARD.
- EXPLOSION HAZARD.
- YOU CAN HURT YOURSELF.
- NOT FOR CHILDREN.
- FOLLOW DIRECTIONS CAREFULLY, AND USE COMMON SENSE.
Step 1: Gather Materials
- nichrome wire (for igniter). Failing this, you can use some thin (30 AWG) copper wire
- medium gauge (16 AWG or so) insulated wire (stranded), for trigger wires
- normal bond paper
- cellophane tape
- aluminum power
- potassium perchlorate
- wire strippers
- a small scale (capable of weighing small numbers of grams accurately)
- a metal cylindrical roller
- an anti-static computer bag
Step 2: Make Fuse
This is the electrical fuse for the squib.
First, cut two pieces of your fuse wire, 1 to 2 feet long. Strip both ends.
Next, cut a small piece of your igniter wire, about 1.5" long.
Twist one fuse wire to each end of the igniter wire.
Double the ends of the igniter wire over, to add mechanical integrity
Straighten the whole thing out.
Step 3: Make Flash Powder
See the other instructable, "flash powder".
Make about 1 to 1.5 grams of flash powder for each squib.
Step 4: Cut Paper
Cut the paper wrapper. Simple: It is a square piece of white paper, about 4" by 4". That's all!
Step 5: Measure Flash Powder Into Wrapper
Lay your igniter across the wrapper.
Pour 1 to 1.5 grams (about 1/2 tsp) of flash powder onto the igniter.
Make first fold about 40% of the way up the wrapper.
Step 6: Second Fold
Fold the top of the wrapper down, and tape in place.
Step 7: End Fold
Fold one end of the wrapper over, including the fuse wire, and tape in place.
Step 8: Final Fold
Turn the open end of the wrapper up, and jiggle the wrapper to settle the flash powder deep into the wrapper.
Turn the wrapper over, and place flat on the table.
Fold the open end across, on the opposite side as the first end you folded. Include the fuse wire in the fold.
Tape in place.
Wrap another piece of tape around the entire squib for good measure, to keep it from spontaneously untaping.
Step 9: Storage
Store until use in a cool, dry place. Best to store in an antistatic bag.
Keep away from children, pets, other chemicals, and sources of ignition.
Step 10: Use
- Step WAY back (at least twenty feet),
- get hearing protection (it's about as loud as a good-size gunshot),
- clear the area of bystanders, and post spotters so no one goes near the charge
- plug it in -- BOOM!!
- be sure to unplug before picking up the pieces!