hey....i am in need of a circuit(external) to run the spindle motor of an old hard drive using a battery.please suggest me a circuit
run the spindle motor
- Thread starter jayanthyk192
- Start date
In order for it to spin, you will need to provide the drive with +5 and +12 volts DC... given the hard drive still works....
i actually want the motor for one of my projects & it is necessery that i run with a battery using a controller circuit.so plese suggest a circuit.
So you want to run a 12 volt motor off of batteries?? What type of batteries are you going to be using? Even with some D cell batteries, they would not last long running a 12 volt motor. And most of those motors are a 3 wire stepper type motor.... good luck controlling that with batteries..... I hope you have a backpack to carry all those batteries to run that small motor....
okay,if it requires 12V then i could power it with with an ac adapter I already have.but giving 5V as well as 12V at a time is pretty difficult as i dont have an SMPS,and moreover i dont get to control the speed of motor using the circuit board of the hard disk.so,i'm searching a circuit.
I think hard drive motors are BLDC's nowadays (Brushless DC motors) - they're actually run by 3-phase power.
See if you can read the part numbers from IC's near the motor connector. The motor connection harness will probably look like a ribbon with 4 wires/traces in it.
See if you can read the part numbers from IC's near the motor connector. The motor connection harness will probably look like a ribbon with 4 wires/traces in it.
If you can manage taking the motor driver off the board, and you know it works, its easy.
none of them require more than a few pull up resistors, and bootstrap capacitor(s).
Most are only good to 3 watts.
I have found most to be controlled via a custom digital link, and the datasheets to be quite informative.
none of them require more than a few pull up resistors, and bootstrap capacitor(s).
Most are only good to 3 watts.
I have found most to be controlled via a custom digital link, and the datasheets to be quite informative.
i tried tracing the leads of the motor,but the circuit is multilayered and i could'nt trace the leads to the control IC as the leads are inbetween the two outer layers and not visible clearly.
the HDD i have has a four lead stepper.I also found it is a star connection.
Wow, so your hard drive IS old.... last time I seen a 4 wire one was back in 2000/2001!
I went through my Hard drive archives and did find a 4 wire one from 2001
.... but it will still require custom circuitry to control the motor, if you are going to be powering this off of batteries, I would suggest looking for an alternative to use.... If you could explain what it is you are trying to do, maybe someone can have a better understanding of your needs....
i was actually trying to build a hovercraft as the motor had very high rpm and very light & generates less heat.i got 2 batteries of an old toy aeroplane.together it gives 14.4V,which I thought could be decresed to 12V and used.
These motors are sensorless brushless motors. They are either delta connected (3-wire) or star connected (4-wire)
What you need is an IC like the TDA5140A
http://www.nxp.com/documents/data_sheet/TDA5140A.pdf
Not sure where you will get one of these. Try Google.
Alternatively, it is possible to design your own using a microcontroller and drivers. Not an easy project though.
I have attached an interesting document from Microchip.
What you need is an IC like the TDA5140A
http://www.nxp.com/documents/data_sheet/TDA5140A.pdf
Not sure where you will get one of these. Try Google.
Alternatively, it is possible to design your own using a microcontroller and drivers. Not an easy project though.
I have attached an interesting document from Microchip.
even i searched for this IC on google and it has to be ordered in bulk starting from 300$.
