Just bumping my latest questions. I promise those are the last ones I'll ask for a while!
If you operate 12v motors seperately or in parallel, you should only need a 12v battery.
To operate a motor in only one direction, try a forum search for "logic level MOSFET".
I noticed the solenoid valve you referenced in an earlier post is a 24 V AC valve. I'm guessing you want the valve installed on this robot and so it'll be rather difficult to get 24 VAC unless you drag an extension cable around. Look for a DC valve.
Jim.
zoomcat and Jim,
Thank you for your replies! Jim, thank you for pointing that out, saved me a lot of headache with that! A quick google searched gave me what I wanted.
Zoomcat, a clarification on the transistor circuit question: what is the difference between using a mosfet to control the motor operation versus the transistor circuit found here: http://itp.nyu.edu/physcomp/Tutorials/HighCurrentLoads?
what is the difference between using a mosfet to control the motor operation versus the transistor circuit found here:
MOSFETs are popular for high current application as they generally have very low internal resistance when fully saturated. They are probably much more efficient due to lower energy losses.
MOSFETs are popular for high current application as they generally have very low internal resistance when fully saturated. They are probably much more efficient due to lower energy losses.
I'd like to add that MOSFETs are probably a better solution for motors drawing more than an amp or two.
Bipolar transistors are OK for small loads since efficiency isn't as important. The costs are not a consideration. MOSFETs are cheap. Just be sure they are logic level parts.
Jim.
Can one Motorcycle battery (http://www.acehardwareoutlet.com/productdetails.aspx?sku=8292211&source=GoogleBa...) of 12VDC volts and 4Ah current output be enough to power two of these 12VDC motors (http://www.virtualvillage.com/powerful-high-torque-gear-box-motor-12v-dc-60rpm-0...)?
i cant see the current spec's in that link it depends on how much time would you want to run your PROJECT !
to make it clear even a small battery can run a motor but it will finish up within seconds based on the current consumed by the motor