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I have been working on this board for over 3 years. Super pumped to finally share it with all y’all.
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0:08- I’m so- Andrew Applepie- http://www.andrewapplepie.com/
0:37- Cereal Killa- Blue Wednesday – https://soundcloud.com/bluewednesday/
3:49- Berlin- Andrew Applepie- http://www.andrewapplepie.com/
5:41- Special song written just fo my bad self- Lincoln Hoppe, http://lincolnhoppe.com/
6:26- Too Happy to be cool by Notebreak- https://soundcloud.com/notebreak/dubstep-too-happy-to-be-cool
Summary: I fulfilled a 3 year long dream to create a dartboard where you get a bullseye every time thanks to some engineering. Basically, you throw a dart and then a Vicon motion capture system tracks the dart in the air. We use those x,y,z positions in matlab to predict where the dart will land using some regression analysis. Once we know where it will land, we move the board to the right spot using 6 stepper motors that attach to the back of the board using fishing line. All of this happens in 400ms or so. Then we took it to a bar to see what people would think of it (SPOILER ALERT: they liked it)
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2way speaker using Fostex F120A 5″ full range driver and Fostex FT90H horn super tweeter with Alnico magnet both. These vintage drivers are designed over 20~30 years ago but F120A is still available. Modern FEM computer aided design speaker unit like Seas and Scanspeaks sounds smooth, clear, perfect low distortion, in comparison, vintage high efficient unit with Alnico magnet sounds straight, vivid and high contrast.
Direct heated triode single ended DIY amplifier using EH-2A3 (non NFB) is well matched.
Driver: Fostex F120A, FT90H with Acoustic lens
Cabinet: SAKAE KB10 (Rubber wood)
Low-pass filter 6dB/oct (Fostex air-core coil)
High-pass filter 12dB/oct (Solen air-core coil, Benic film capacitor)
Cross-Over: 12 kHz
DIY 2A3 SE-non NFB
2A3: Electro-Harmonix Gold
6SL7 (SRPP Drive): Hytron
5U4 (Rectifier): Raytheon