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This project has evolved some , the basic rundown is I'm modding two Omnibots , one a regular the other a larger 2000 model. I will have two ezb kits , rad base idea was thrown out because of so much noise but could go back on the table if the omnibot drivetrain is too weak to pull it.
By jstarne1
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Thanks for the motor info , what voltage do these run on? Is 12v fine or do I need to get a step down transformer?
12 volts or 15 volts from roomba its 15 volts at 500 ma ,but 12 volts will work great also you never use a transfomer to stepdown,and transfomers are ac input/output also some other stuff about using DC-DC converters for stepdown not a great idea to use one,one is you lose current,some supplies the chip ,some lost in the driver trasistor,some loss in other parts,BEST IS LDO low dropout regulator ,one very good reason LDO most have .1 or .2 dropout compare to a regulator at 1.25 dropout so it meeds if 12 volts in and 9 volts out you get 9 volts minus 1.25v so your battery cann go low as 10.75 and still get 9 volts out with LDO ,battery can go low as 9.2 volts and still get 9 volts out,so it last much much more longer
now on a DC-DC stepup is the only idea that works good also you only need one LDO in a circuit unless a split power supply design does not make sense or saving anything if first using a 9 v LDO AND THEN 7.4V LDO i talk alot about BATTERY POWER LOSS ,because its my biggest field and all we make at the factory is battery instruments and thats what robots use SO JOSH and others some ideas on saving battery power,will do a much bigger post on it soon
That's why I'm trying to run as much as possible on the 12v that my batteries produce so I'm not wasting much power. To answer your question about the motors speed would be controlled by a combination of pwn and the gearbox can change gears as well.
thatdoes help some,but at the same time better to run at a lower voltage main reason is 12 volt items dont run very long at 12 volts ,where if used lets say 9 volts it runs much longer 3 extra volts about ,example it battery is 12 volts at 10 amps thats 120 watts at 9 volts you get 147watts and power loss is only .1 volt at 10 amps so 1 watt using LDO ,SO TOTAL IS 146 WATTS
SO WHATS IN THE GOODIE BAG YOU WANT,going on a vacation trip in a few weeks,universal studio,zoo,and clearwater to see my favorate dolphin from a movie DOLPHIN TALE (WINTER)
Ok so i picked up a mouse sander at walmart tonight to sand the torso.
Yay, tools are always fun times! Can't wait to see some progress pics Josh.
mouse sangers are great to get sanding done much faster,i have on does a great job on my robots that one will get you job done finish fast JOSH always good to have all the tools you need.i have going to store to by any i ordered a nice air plastic welder with plastic welding sticks ,cant wait to try it
JOSH havent told the list you want from me
Hey Josh, finish Jarvis in time for the Robot Hall of Fame?