Code snippets, ideas and events from IT related projects

Today I will present a simple speaker, that I made from scratch. It's trivial but sounds really good, unfortunately it has also low power (it's hard to hear).

Used materials and tools:

• strong or at least big magnet,
• paper,
• paper glue,
• slim, isolated wire (from small, signal transformer),
• minijack cable (can be extracted from broken headphones),
• knife and scissors.

Assembling:

• from paper cut a circle with about 3'' radius,
• make inductor from wire with about 60-120 wire loops,
• use knife to scratch glaze from end nodes of inductor,
• take a glue and stick inductor to paper circle,
• connect nodes of inductor to minijack cable,
• put circle on the top of magnet,
• that's all, you may plug cable to PC or mp3 player and listen =)

Bellow is a sample captured from speaker. I've lost original track, so I can't put it here for compare ;-(