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11
Software / how to control robot via internet ?
« Last post by ansh on April 15, 2014, 06:06:47 AM »
I want to control robot via internet using computer

many microcontroller have tcp/ip protocol. microcontroller can communicate with computer using Internet

Computer → Internet → 100km distance  →Internet TCP/IP micro controller


when  I will open web browser like firefox, google chrome then what is next step for me

which software I need to use to control robot using computer  via internet?
12
Electronics / Connecting servo motor to mbed processor
« Last post by PBG on April 14, 2014, 01:09:13 PM »
Hello! I am currently doing a project where I have to drive a small servo motor from an mbed processor. However, only the supply voltage of the motor is given as 4.8-6V but not the pulse. when connected directly to the processor, the motor doe not operate and hence I guess I need an external circuitry to interface the two. A bjt amplifer can be fine but since the motor is a three wire one I do not know how to connect it and what are the external components and their sizes required. Can anyone please help me perhaps with a circuit diagram?

Thanks
PBG
13
Misc / Re: Trash robot
« Last post by mickyjune26 on April 14, 2014, 12:57:44 PM »
That makes sense.  Thanks for the tips!  No independent wealth here.  :)

Hey - any robot books or tutorials that you recommend to support this project?
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Misc / Re: Trash robot
« Last post by jwatte on April 14, 2014, 09:48:39 AM »
Absolutely start with the little one, unless you are independently wealthy!

To figure out which motors you need, estimate the needed torque. If you direct actuate, the load is the weight of the object, times the distance between the axis of rotation and the center of mass of the object. If you use something like a linear actuator, you instead get force, so load is simply mass times gravity. You also want to pay attention on the difference between "stall torque" and "continuous torque" -- motors that work at their max (stall) load more than just briefly, will overheat and die.

Once you know which motors/actuators you need, you can pick a RoboClaw that is rated for at least the amount of current drawn by that motor/actuator. For example, if you're using a motor rated at 5A, you can use a 5A rated RoboClaw; if you use a motor rated at 20A, you can use a 25A rated RoboClaw.

15
Electronics / Re: IR Transceivers
« Last post by andr33ii on April 14, 2014, 06:07:01 AM »
I did the exact schematic from toim 4232 datasheet, pag.5 and it doesn't work. I checked it to be sure i did it corectly and everything is good. I was looking on admin's schematic and it looks easier but don't know what are those 4 pins that he is using from ir transciever
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Misc / Re: Trash robot
« Last post by mickyjune26 on April 13, 2014, 09:01:50 PM »
Thanks for your help.  My name is Micky, and I'm Landon's dad.  We're really having fun getting into these robots.

A few final questions before we buy our parts:

0.  (yes - question zero)  Should we do this on a small scale first (like an office trashcan), or should we go for broke and build a robot strong enough for the city trash big?
1.  What servo model #s are appropriate (based on your answer to question zero)? 
2.  Is there a specific Roboclaw model # would you recommend?  We looked up Roboclaw and there were many types of models.
3.  What power source would you recommend?
4.  Is there a good tutorial site or book we could review, so we don't have to bug ya'll as much?

Thank you very much!  My son said he'd like to build robots or be a scientist when he grows up.  I'm hoping to keep these dreams alive.  :)
Micky
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Misc / Re: Trash robot
« Last post by jwatte on April 13, 2014, 08:29:35 PM »
The exact one you asked about in the first post:

Quote
Can the following controller controll the listed movements below?
DX5e DSMX 5-Channel Transmitter/Receiver Only MD2

Hold the DX5e in your hand. It transmits signals.
Wire the receiver part that comes with that into the RoboClaw.
The receiver part turns radio waves into RC-style control pulses.
The RoboClaw turns RC-style control pulses into modulated motor power.
18
Misc / Re: Trash robot
« Last post by landonmay13 on April 13, 2014, 04:43:24 PM »
Thanks for the tip!
I decided to use the RoboClaw Motor controller, but it looks like the roboclaw is a computer chip that I put on my robot to control the servos.
What device that I hold in my hand to wirelessly control the roboclaw?
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Electronics / Re: IR Transceivers
« Last post by jwatte on April 13, 2014, 11:29:57 AM »
For us to understand what you're doing, I think you need to post a proper schematic.

Also, if you drove +5V directly into the IR LED from your microcontroller, that's a lot more than most IR LEDs are rated for, and it's possible you burned it out. I'm not familiar with TFDU4101 specifically, so I don't know if this is a risk or not.
20
Electronics / IR Transceivers
« Last post by andr33ii on April 12, 2014, 11:57:08 PM »
Hello! I saw this post http://www.societyofrobots.com/electronics_irda_tutorial.shtml and that's exactly what i have to do. I have TFDU4101 transceiver and i tried to connect the IR directly to the MCU (How i connected it's pins: 1-5V, 2-NC, 3-MCU Tx, 4-MCU Rx, 5-tried with +5v and with ground too, 6-+5V, 7-NC, 8-GND) and it didn't work. After that i tried the MAX232 - ENCODER - IrDA transceiver scheme. I did the exact scheme that TOIM4232 provides on page 5 (if you look on TOIM4232 datasheed) and again, didn't even send something, not to say about receiving. I looked on oscilloscop, and there is no info on MAX232 Tx. Don't know how to make this transceiver work, i was looking on admin's tutorial and saw that he used 4 pins from TFDU transceiver. So, does he used only Tx,Rx,+ and GND? (so pin 1,3,4 and 8?). Sorry for grammar or any other english mistakes, i'm not that good at english.
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