Synth Spin Table
by littleBits October 24, 2013
Play your Synth Kit like a DJ! With two turntables attached to the two oscillators, you can make a variety of sounds with the spin of a disk. This sound circuit was designed to mimic the sounds a DJ might make when scratching the turntables.
This project can be made in a variety of ways! The instructions below are for a more complicated version. For an easier version that uses common household materials, see instructions from the Synth Kit Booklet (p.32-34).
Start with this circuit: Power + Micro Sequencer + Split
1.) Oscillator + Mix 1
2.) Oscillator + Mix 2
Mix 3 + Envelope + Speaker
Find an awesome box or case for your synth spin tables to live inside of. Our case used to hold roller skates and measures about 15” long X 11” wide X 6” deep. You will want your case to be about this size or bigger.
Using a laser cutter, cut the first file (SynthSpin_1/4 Acrylic_Template.ai) out of the ¼” acrylic. This will be the base for the modules to sit on. Then cut the second file (SynthSpin_1-8 Acrylic_Template.ai) out of the ⅛” clear acrylic. This will be the top layer which the knobs will poke out through. You can adjust the dimensions of this file in order to make it fix your case just right. You will also have two extra clear acrylic disks - we will use these later on.
Cut the 4 wood blocks to the same height. Their heights should measure about 1” below the edge of the bottom half of your case.
Use glue or 3M VHB tape to secure the blocks to the 4 corners inside the case.
Place the ¼” acrylic base on top of the wood blocks. Mark where the corner holes from the acrylic are located on the wood blocks.
Remove the acrylic and predrill holes in the places you marked on wood blocks.
Place the Bit’s Modules into their corresponding holes on the ¼” acrylic base. The wires from the Splitter and the Mix modules pass through the rectangular holes so they are not visible from the front. In order to do this, you can disconnect and reconnect the JST connectors on the wires. The battery will hang down through the bottom.
Place the ¼” acrylic base on top of the wood blocks in the case. Position four ½” standoffs over the holes in the corners. Then place the clear ⅛” acrylic layer directly on top. The holes in the corners and the knobs of the modules should all line up.
Use wood screws to hold everything in place. You may want to countersink the holes in the clear acrylic so that the tops of the screws are flush with the surface. The screws should go down through the clear acrylic, the standoff, the base acrylic, and into the wood, locking everything in place.
Use a laser cutter to etch and cut out two wooden disks with this file - SynthSpin_WoodDisk Template.ai.
Press the two disks onto the two oscillators. Then press the clear acrylic disks on top of the wood disks. They should fit quite snugly. Now, when you spin a disk, you turn the oscillators.
We wanted our case top to stay open at a certain angle so we used wires for side support and secured them with nuts and bolts.
Power up and start spinning! For big sound, you can plug into exterior speakers!
Bits used (8)
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Other Materials Used (10)
- 1/2" Standoffs 4
- 1/4" Sheet Acrylic 1
- 1/8" Birch Plywood 1
- 1/8" Sheet Acrylic 1
- 3M VHB Tape 1
- Case or Box (at least 15”x11”x6”) 1
- Nuts and Bolts 4
- Wire or String 1
- Wood Blocks 4
- Wood Screws 4
- Electric Drill
- Laser Cutter