Wind Generator from old scanner [updated]

Step 3 Building the rectifier circuit

Since stepper motors generate alternate voltage you need to rectify it. Each phase must be rectified with 2 diodes, this is, 8 diodes.

The output of the rectifiers will be stabilized with a 1000uF capacity and a 5v voltage regulator (LM7805 in my case).

Attach some connectors to allow charging different gadgets. I added a female USB connector since my phone and mp3 use USB to charge.

Note 1: this motor can generate easily more than 5V, but i only need 5V by the way.

Note 2: there is an issue with the USB female connector. You need to follow the USB specifications in order to make it work. USB2 charging needs two 15KOhm resistances on the data buses to work properly. Check comments on this instructable for more info: USB charger

Note 3: I used this free software for circuit simulation: QUCS
It lacks of some components right now, but it's great after all.

UPDATE
Still can't get usb charging on my phone. My mp3 charge ok, i think it's USB1.

Comments

[electronic boy]

if you want to light a bulb then your best bet is to put a charging circuit and a battery so your light dose not flicker if there is no wind

[DeanC993]

hi could you just hook up a light to the generator i have the same generator as you and i only want to light a bulb of it o you know how i could do it?

[gilles99]

your third picture have a mistaque with your graetz