K-nex Record player do it yourself

Record player built with K-nex kids toy, spare DC motor, and acouple of rubber bands, a painters disposable mini paint tray (or a disposable plastic plate), a sewing needle and some thread.

Category:

Howto & Style

Tags:

• Record player
• K-nex
• kids toy spare DC motor
• phonograph
• needle on record

[jgoldbla]

The power supply is a tektronix 2520G. It is overkill for this application. Any 0-10V 2A supply will work (depending on the motor you use).

[AnalogueJosh]

You can use the K'nex motor that's supplied in the kits, it does run at about 33rpm! the only trade-off is that the motor runs unstable so you get unstable playback. But still it's pretty amazing! I think in the next build I will use a dedicated motor and speed control :) This totally inspired me now!

[jgoldbla]

thanks for the comments. You might want to try spraying some silicone lube on the friction areas to help keep the drive more constant, I also noticed that the speed changed at different points in the rotation.

[dmonks40]

It's very spooky.

[bgoldbla]

GGGGGGGGGGGGGGOOOOOOOOOOOOOOOO­OOOODDDDDDDDDDDDDDDDDDDD!

[Lachlant1984]

That's really interesting, what a big power supply you've got there, what are its specs?

[nicolaj0154]

maybe you should have done it with an old phongraph record.

[madknexman]

wow iv never seen this before! its brilliant idd love to do that 1 thing how do you get hold of a dc motor?

[mgoldbla]

That's pretty cool. I think that was my record you ruined. See if you can design K-nex to perform a colonoscopy.

[njg12345678]

Very interesting.  Well explained and filmed. Keep fine tuning it and put up another vid with a little better sound.