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Electronics / Lynxmotion's PS2 Robot Controller (v3)
« Last post by tzankoff on September 26, 2014, 09:36:40 PM »
Hi guys! I just thought I would give you a heads up regarding Lynxmotion's latest version of the Robot Controller Kit. This is just for informational purposes in case anybody is wondering about this product.

As some of you may recall from a couple of so years ago, I wanted to add wireless control to my robot. Lynxmotion sold a different version of their kit that included a wireless controller and receiver and a separately sold breakout cable. I plugged the whole thing into my Axon II...but it did not work. However, when I plugged in a wired controller, it worked just fine. After some back and forth with some folks here at the SoR forums and the guys at Lynxmotion, it was somehow determined that some kind of clock speed issue was to blame (as I recall). Realizing that I was at a loss, I just went ahead and used a wired controller and was happy with it.

Fast forward to today. I am upgrading my robot once again by switching from a plywood frame to an Actobotics frame. I revisited the wireless control idea once again. I noticed Lynxmotion had a new version of the kit which includes a level shifter. I was hoping that this device would solve the previous problem. I was actually hesitant to buy it because I did not want to get excited about the possibility of this thing working only to be disappointed again.

I bought one of the kits...and it did not work. The receiver powered on but the controller did not...*BUT* I later found out why. I opened up the controller just to take a look around and I think what happened is that the connector from the battery tray (requires 3 AAAs) to the controller board might have been loose because once I got everything back together again (including plugging that connector back in), it worked just fine. I plugged in a wired controller again just to make sure that worked, and it did...and now that I have mentioned all of this, I am going to keep a wired controller in my bag...just in case. :-p

Hooray for me! I finally have a wireless controlled robot.

Now on to wireless audio... :-p
Electronics / Identifying Maxon A-max DC motor
« Last post by ChristianKjaergaard on September 24, 2014, 03:02:05 PM »
I just found a lot of these motors, but I can´t find a datasheet on maxon´s website. Maybe you guys know how to identyfy the motor.

What i can measure.

Weight: 100g
diameter: 26mm
Resistance: 8 Ohm

Best regards
Software / Re: PS2 wireless controller protocol
« Last post by ShaneH on September 23, 2014, 07:12:09 PM »
Software / Axon 2 stuck bootloading
« Last post by jrm06c on September 23, 2014, 03:33:11 PM »
I've been programming the axon 2 without any problems. Now it suddenly (after programming it with a code revision, as usual) will not run through the initialization process and the LED does not display anything. The axon will program each time I attempt to program it but afterward the controller never seems to go into normal running mode. I've tried power failing the board but that does not change the behavior. Any ideas on how to fix this issue or what caused it?
Electronics / Re: Motor control...New at this...
« Last post by TRIAL_and_TERROR on September 23, 2014, 02:13:33 PM »
I think I may have stumbled upon a solution on one of the home page tutorials actually.  And to answer your question, I have searched briefly here and extensively on the web.  I think my biggest issue admittedly is the technical terms that get me. 

Anyways, The solution I found showed the use of just 4 MOSFET's per each motor and had a relative simplistic description to go along with the diagrams.  I also found a 55v 64A MOSFET available through radio shack.  It listed the 64A as ID though...not sure what the ID means yet...but have an idea which tells me I should be ok.

My biggest down fall was everything I found that seemed obtainable ultimately mentioned "logic" and "programming" and that's where I went even further off the track.  I think I may be on to something with what I found though.  Didn't mention the necessity of relays and said there should be built in diodes...

Further more, I intend to make use of a VEX robotics radio/receiver that I have from awhile ago.  From my understanding just wire each of the MOSFETS to the receiver to energize the 24v circuit.  Past experience tells me that it will be easier said than done!
Electronics / Re: Motor control...New at this...
« Last post by waltr on September 23, 2014, 12:37:24 PM »
Did you search the forms here for wheel chair motors?
Relay motor control?
This has been asked and discussed several times.
Electronics / For Billy and all forum members - semiconductors industries
« Last post by Ana_Dig on September 23, 2014, 10:04:48 AM »
Hi Billy and all the forum members,
Before approximate 8 months I read that some big companies begin to invest a lot of money in change the wafer size from 300 millimeters diameter to 450 millimeters diameter, in these days one friend tell me that he hear that all the industries in semiconductors stop all these processes and all the semiconductors industries will stay with wafers that have 300 millimeters diameters, because I am not sure that it is true and I don't understand what happen so I try to find in google some articles that will confirm it or disprove and will give information and details for these two options (confirmation or disprove) like:
1. If it was stop so why the semiconductors industries stop to the research and development to move from 300 millimeters diameter wafers to 450 millimeters diameter wafers?
2. If it was not stop so what are the advantage and disadvantages from moving from 300 millimeters diameter wafers to 450 millimeters diameter wafers?
Electronics / Motor control...New at this...
« Last post by TRIAL_and_TERROR on September 23, 2014, 09:53:45 AM »
So the noob that I am I have found myself buried in books and searching online schematics to no avail.  Essentially I have two 24vdc motors from a wheel chair that I need to come up with some sort of controller for.  I tested the motors and they peak free load at about 40A and confirmed that the manufacturer had a 60A controller on board.  I would like to create my own H-bridge (reversible dual channel) to help save cost as well as ease of replacing parts. 

I wanted to just use relays, but heard that MOSFETS can be incorporated to create the effect of speed control?  I am way to knew at electronics and am having trouble finding a parts list or schematic that also spells everything out.

What I would like to accomplish is an 80A peak dual channel reversible hbridge that would allow speed control without having to spend $200.00 on a commercial one.

Does anyone out there have any insight on how to accomplish this and/opr what components to use?  Also suggestions on circuit protection...oh and everything I have read about always leads to programming...can this be done without having to program???
Misc / Professional Wireless Follow Focus System
« Last post by cain82 on September 23, 2014, 06:12:17 AM »
Hi all,

I'm a professional film maker/Steadicam Operator. I'm looking into the possibility of creating a wireless follow focus system for Steadicam. I will test/use the machine in a professional environment as part of the development process and pay for all materials needed.
If you look into the market you will see that the cost of buying one of these can be well beyond the reach of many individuals and even small production companies. I want to develop something for my own personal use, with a view to possibly entering the market if all goes well.
Please note: I know very little about electronics/mechanics, I am looking for a person/persons who will happily create this independently and only look to me for feedback on practical application/testing and finance. I am not looking for a person to do all the hard work who I'll leave high and dry once I have what I need, this will be a joint/equal venture that I hope will benefit both parties regardless of the final outcome (whether or not it works as required.....whether or not it is a viable product for entering the market). 

On the market you can buy this:


to this:

Industry standard

Can we make something with the same standard of quality, features and performance of the industry standard for the roughly the price of the entry level product??

Many kind regards

Neil Cain
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