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Author Topic: Very Basic Question!  (Read 979 times)

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Offline rockroboticsTopic starter

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Very Basic Question!
« on: March 11, 2010, 09:38:52 AM »
Hi,

I'm very new to electronics and to robots and I want to know
how you connect the three pins on a potentiometer!  I know this is really simple to you experts, but please explain it to me.  I don't get why it has three pins!  Please help.

Thanks,

Newbe
Rock Robotics

Technology of the Future!

Offline chelmi

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Re: Very Basic Question!
« Reply #1 on: March 11, 2010, 10:14:16 AM »
Multiple posts...

What do you want to do with your potentiometer?
If you just need an adjustable resistor, use the middle pin and on of the other one (doesn't matter which one).
If you want to do a voltage divider to get an adjustable output voltage, connect it like that:

VCC -----+
         |
        | |
        | |<---- out
        | |
         |
GND -----+


Chelmi.

Offline rockroboticsTopic starter

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Re: Very Basic Question!
« Reply #2 on: March 11, 2010, 10:37:13 AM »
Thanks,

That answered my question! :D
Rock Robotics

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Offline Soeren

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Re: Very Basic Question!
« Reply #3 on: March 11, 2010, 04:42:40 PM »
Hi,

If you just need an adjustable resistor, use the middle pin and on of the other one (doesn't matter which one).

Better yet, connect the unused "side pin" to the middle pin. That way the resistance can never be more than the value used and cannot go open (in some circuits that would be disastrous).

Like this
Code: [Select]
    -----+
         |
        | |
        | |<--+ out
        | |   |
         |    |
    -----*----+
Regards,
Søren

A rather fast and fairly heavy robot with quite large wheels needs what? A lot of power?
Please remember...
Engineering is based on numbers - not adjectives

Offline rockroboticsTopic starter

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Re: Very Basic Question!
« Reply #4 on: March 11, 2010, 05:11:43 PM »
Thanks alot!

Your very helpful!
Rock Robotics

Technology of the Future!

 


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