Bedini SG made from harddisk component

[sucahyo]

Here is a Bedini School Girl made from harddisk component.

Parts:
- Harddisk platter for rotor
- two neo magnet from harddisk. detached by bending the base.
- two harddisk head controller coil
- 2 x 100 ohm resistor
- two NPN transistor
- 2 x 1N4007
- 12V SLA battery

Transistor is used to reduce spark. Transistor type will greatly affect output and performance.

The timing can be done with sticky tape and some strand of wire. I use neo outside diameter surface as the contact point since I found it produce brighter neon then when using the plate as contact point.

The plate is attached at servo motor. The servo is made from iron which add drag to the rotation. I can not extract the magnet from it so it also add drag. But I think servo motor can be utilized later as generator.

I want to arrange it as rotary attraction motor, which is finally work with two pole. The motor rotate at around 60rpm.

YouTube - Mechanically triggered Bedini SG with harddisk component
YouTube - Harddisk Bedini SG #2, two pole attraction mode

[Inquorate]

Looks cool sucahyo, and best of all, seems like you're having fun

[sucahyo]

Yes . Although this has much less charging capability compared to other circuit, it is more fun to watch and play .