Igniters

[Zappy100]

Hi there,

following is a piss-easy method to make electric igniters:

Material needed
- Acetone
- 5 ping-pong balls
- nichrome wire (from hairdryer or rocket igniters)
- isolated wire 0.6 mm diam.
- some black powder (extract from firecrackers or make your own)

Step 1 - Make NC (nitrocellulose laque)
- buy 5 ping-pong balls
- cut them into pieces and completely dissolve in 150 ml of Acetone
- this gives a thick laque
- take half of this laque and thin with more Acetone until you have consistence of milk

Step 2 - prepare wires
- take 2 pieces of wire (0,6 mm - length 160 mm) and remove isolation 2-3 mm on one end
- drill them together so that the end of one wire is slightly shorter than the end of the other
- take a short piece of nichrome wire and drill around the 2 wires (starting at the un-isolated wire one downwards until it comes in contact with the un-isolated wire two)
- now you have a nice bridge

Step 3 - preparing primer
- take the thin laque produced in step 1 and mix with black pwder (use film can) until you have a kind of greyish thick liquid

Step 4 - priming
- now dip your bridge into the primer prepared in step 3 until the nichrome wire is completely covered
- allow to let dry
- when dry dip into the thick laque (produced in step 1) and allow to dry

Now you have a completely waterproof and well working electric igniter. Just stick into your detonator until coming into contact with your primary explosive, crimp and seal and your done!

This igniter should work with a simple 9 V battery. :D

[Arthis]

A 9V battery ? This is pretty low. Is nitrocellulose laque + BP sensitive enough for that ?
btw, does that mix really explodes, or would it be better with AP ?

[Zappy100]

That mix is not to explode but to cause a detonation of your primary in the detonator. My description is for an electric IGNITER. When using a thin nichrome wire used for model rocketry ignition a 9V battery should be sufficient.

[Titanium]

Hey that's kind of old... You better search before you post!