Figure A
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Figure A |
An extremely useful sparker used for initiating reactions of gas mixtures (as shown in the figure above) can be constructed from an empty (out of fuel) piezoelectric igniter such as an Aim-&-Flame. The assembled device is shown here.
How to build a sparker
Make sure
the piezoelectric lighter is completely out of fuel. Use the pinch-nosed
pliers to remove the end cap from the lighter. Locate the terminal
in the center of the barrel of the piezo lighter. Click the lighter
to observe a spark arcing between the terminal and the chassis of the lighter.
Remove 5 mm of insulation from one end of each of the two 8 cm lengths of
24-gauge wire. Solder one of the bare wire leads to the chassis and
the other to the piezo electrode as shown at right. The cavity around the
piezo electrode is then filled with hot glue which adds stability and provides
insulation from arcing. Carefully twist the two wires together as shown.
Simultaneously cut both wires so they end in close proximity. Do NOT
remove insulation from the arcing leads; the spark will easily jump and the
insulation prevents the leads from making contact. Place a band of
electrician's tape around the chassis/wire lead solder joint to complete
the project. Click the lighter to check for spark.