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91
I'm looking to make a wing build similar to the one pictured below but am not sure what motors to use for the shoulders and to flap the wings in place of the hinge in the middle, the shoulder motors appear to be custom dc worm gear motors and I was about to purchase power window motors to use in place of the shoulder motors and two for each wing arm in the central back pack unit, the thing is that power window motors pull incredibly high amps which made me reconsider using dc worm gear motors but I can't seem to find which one would be suitable for this build.

 https://imgur.com/olELOUJ
92
Misc / Summer SALE !!!
« Last post by ServoCity on June 15, 2018, 02:06:11 PM »
It's summertime and we're kickin' it off with sizzling summer deals! For a limited time get 30% - 40% OFF Actobotics!


 
www.servocity.com
93
Electronics / dc motor mechanical oscillator
« Last post by rouncer on June 09, 2018, 01:44:44 AM »
95
Misc / Re: Non standard H-Bridge?
« Last post by rouncer on June 05, 2018, 12:32:34 PM »
Im back,   you should draw a simpler schematic of it, and see if you can nut it out,   hbridges are pretty simple,   this looks fancy,  its only 2 transistors and 1 diode!   nice 1.
96
Robot Videos / concept illustration for a hexapod
« Last post by rouncer on June 04, 2018, 09:00:56 PM »
The ones with the head planted central on the body look dorkier,   ive seen a few like this.   theres 2 places you can put a head on a spider, at the front is the cooler one,  planted on top is the cuter look. :)



But the dorkier one has a lot more space for a big chopper mouth,  scary.  I was going to say "brain space"  but a brain can be anywhere in a robot,  so i guess its more functional space in general.


heres a video of one like this in action.
https://www.youtube.com/watch?v=R0LKhXvMF1c
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Misc / Re: Non standard H-Bridge?
« Last post by rouncer on June 03, 2018, 10:24:29 PM »
It would take you a bit of time, but as long as you use a small enough power supply,  you wont blow a component by accident and you can check for conductance.

From the look of it,  id say those 4 big metal bits out the edges would connect to the motor.   But those transistors look pretty small, they wouldnt take much current.

From the look of those resistors and transistors its look pretty low watt,  which doesnt make sense to me, cause a h-bridge should be high watt.
What do u think?
98
Misc / Non standard H-Bridge?
« Last post by deepakprabakar on June 03, 2018, 08:13:00 AM »
I m an noobie at robotics. I just started out by buying a bunch of components I might need for building a line mover bot. I have attached images of the hbridge that I bought. I am unable to figure out how to use it because it does not match with any of the standard hbridges that I see online. Leads me to wonder if I have been duped. Any help in figuring out the connections or any urls that might be useful in figuring this out will be much appreciated. Thanks a lot!
99
Electronics / voltage divider for absolute positioning of driver motor
« Last post by rouncer on June 03, 2018, 07:09:44 AM »
so heres a voltage dividor, my own style,  and the current position pot is locked to the motor as it turns,  and this divides current away from the motor, theres 4 problems I see now,  but there is probably even more in the future I havent seen yet.

A) it only turns the motor one way,  and it could work with 2 over the same motor, because left would be the not of right, so maybe it wouldnt lose too much power doing it,  but there would be even more power loss.

B) the signal from the computer, would have to be full volume on the other side, so youll need a transistor to build up power. but I have in mind a capacitor to capacitor jumping circuit, but for that you need an oscillator, and mine isnt running yet.

C) the potentiometres will fry under the total watts going to the motor, so they have to be pretty tough ones, and u probably cant buy them, you could make them out of toaster wire, and they would be a lot tougher.  and the pots get very hot.

D) its only an approximate position your getting, it depends on the balancing resistor and the friction and load of the system, which have to be constant for you to pick the right resistor for, because its a divide not a subtract.  (it means if you hold the robot back from its posture, the divide will actually end up in the wrong space, because you supplied variable resistance to it.



And this is what im looking at the moment,   the plus side, is the system is resistant to wizards that arent powerful enough to stop the amplitude of the system,  except for the lower capacitors that are amping up from the computer,  but the computer is the weakest link in how much watts its using,  because the register apartments have to be small, therefore they are easy to influence with telekinesis, and im still thinking about how to get the whole thing high watt.   but at least the actuator circuit is impervious to it.
100
Mechanics and Construction / Re: Servo Gear Help!!!!!!!!!!!
« Last post by rouncer on May 31, 2018, 07:25:02 PM »
nice one.

It would be nice if you could post your progress?   This site needs a reawakening and it takes more than one person to do it.
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