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Finally, a high powered PIC controlled marshmallow gun – “This device uses a PIC12F629 to create a burst of 30 high voltage pulses. The PIC activates a 1000 volt N-Chan FET driving a standard ignition coil. After the ignition, the PIC goes dormant until activated again. Most of the electronics, including the battery and momentary switch are located in the handle.” – Link.

Related:
HOW TO – Make a marshmallow shooter – MAKE 01 – Page 172 (subscriber log in).
Marshmallow shooter projects – Link.