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A split-flap TV with no electronics at all. A yellow crank on the side flips the pictures, one click each, and the yellow knob waves the rabbit ears. It's all printed parts: no screws, glue or wires. Drag the model to look around, and use the two buttons under it to turn the crank and the knob.
Everything moves by hand. Two small mechanisms do the work, and both are printed.
The crank's hex peg goes through the cabinet's side, across the side bay and into the axle. The axle runs through the divider wall, with its tip in the spool. A 20-tooth ratchet wheel on the axle passes a flexing pawl in the bracket: it clicks once per picture going forward and stops the spool going backwards, where the flaps would jam on the stop fingers.
The knob sits on a printed shaft that ends in an off-centre disc just under the roof. The antenna's shaft comes down through the cap and ends in a fork that straddles that disc. As the knob turns, the disc's centre moves side to side and the fork follows it, so the ears swing one way, back, the other way and back on every turn.
Tick things off as you gather them. The ticks are saved in this browser only.
No screws, glue, wires or batteries. Everything presses, clicks or slides together, so the TV comes apart again the same way.
Measured on the 3D model with the knob turned all the way round (every 15°), the crank all the way round and the chassis sliding in: nothing collides. Parts that aren't meant to touch are at least 1.2 mm apart. Parts that turn, slide or press together use the fits in the second table.
The model says these work, but none has been printed. If one is off, say what and by how much, and the part gets adjusted.