Thingiverse
Phonohorn amplifier
por RainbowMan
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This horn was designed in 123D Design. The Circuitry consists of a 3 volt coin cell battery, a 3 volt coin cell battery holder, a UM66T music chip, a small speaker, and a momentary push button. The horn that this uses amplifies the sound a little but it is still clear. The box that holds the circuitry is small so you can carry it around in a coat pocket or etc.
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