Hello,

I have this circuit but its not working with the components I am using
some details about the circuit :
The GPIO pins generate 3.3V DC
I am using a 470 Ohm resistor
using a CPN2222 transistor
instead of 6v i am using a 12v battery for the motor
can some one suggest me what should be used and what I am doing wrong coz every time a 3.3V current is generated from GPIO pins motor should rotate, but currently nothing happens.

thanks in advance

 

How much current does the motor need to start? That means, "Locked rotor current" because all motors start from zero RPM and, for a short time, draw as much current as if they were in a stalled condition.

 

How much current does the motor need to start? That means, "Locked rotor current" because all motors start from zero RPM and, for a short time, draw as much current as if they were in a stalled condition.

this is the specification of the motor
http://robokits.co.in/shop/index.php?main_page=product_info&cPath=2&products_id=276

 

That motor is recommended for use with a 20 amp controller.
Are you trying to supply it with a transistor that can't survive 1 watt of power?

 

As stupid it may sound but yes
So what should I do ? to make this work ?

 

Not the right transistor.

Use a IRF MOSFET, or larger power transistor.

 

can you suggest some part no. and the current circuit will work good ?

 

The controller price is listed in Rupees from India?
Not likely because that translates to 12 cents, American.

http://coinmill.com/INR_calculator.html#INR=6.50

If 12 cents is true, buy the controller.
Other wise, try a logic level MOSFET rated for more than 20 amps.

I'm sure you will want to correct my dismal attempt at valuing the controller.

 

@#12
its 650INR so 12USD approx
but how will i integrate it in my current circuit that will be an issue

 

It comes with a simple TTL/CMOS based interface that can connect directly to the IOs of an MCU.

You typed in, "GPIO" and that seems to indicate that you are using a micro-controller of some sort. The green part is a description of the controller. It has lots of features!

If all you want the motor to do is run in one direction, this circuit is a good place to start, but most mosfets want 5 volts on their gate. What's your preference?

 

well I was planning to use this with Raspberry Pi computer
http://www.raspberrypi.org/quick-start-guide

yea the motor has to run only in one direction to start off
the input voltage from the board itself (software control) is 3.3v (+/- .2V)

 

I think there are solid state relays that can operate on 3 volts. Have to go look some up.

Guess what...they cost more than the controller board.

 

This circuit will translate the 3 volt MCU to a high enough voltage to run a MOSFET, then the MOSFET can run a motor or a relay.

 

you suggest i put a Mosfet on "collector" will solve the problem
can you suggest which mosfet to put

 

No. That drawing does not show the mosfet connected to an emitter.

It's past my bedtime. I have to go. Somebody else will soon help you.