New Netburner MOD5270 carrier board does it all!

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Vernon
Posts: 177
Joined: Sat Oct 10, 2009 6:33 pm

New Netburner MOD5270 carrier board does it all!

Post by Vernon »

Image
Picture shows my new (just had it made in China) Netburner MOD5270 carrier board. It offers a 16bit I/O expander, all the MOD5270 GPIO, two serial ports, 4 channel 16 bit A/D, 6 500ma relay drivers (ULN 2803A), and 16 servo (or PWM channels). Two of the 2803A channels are driven from 3.3V and will operate LEDs and loads under about 50ma.
https://www.youtube.com/watch?v=4Tx6jJKtteo
Above video shows generation of DCC (Digital Command control) model railroad signals with a Netburner. It also shows the web interface buttons.
https://www.youtube.com/watch?v=DaRNY7TQXI0
This one shows the same H bridge stepping a stepping motor.
https://www.youtube.com/watch?v=fJLCv6pa2pM
Above shows control of a servo, you can control 16 of them if you want. This uses a gamepad to control the servo. This is just a brief demo - much more is possible.
rnixon
Posts: 833
Joined: Thu Apr 24, 2008 3:59 pm

Re: New Netburner MOD5270 carrier board does it all!

Post by rnixon »

Thats pretty cool. Thanks for posting.
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mx270a
Posts: 80
Joined: Tue Jan 19, 2010 6:55 pm

Re: New Netburner MOD5270 carrier board does it all!

Post by mx270a »

DCC via Netburner - that's pretty cool.
Vernon
Posts: 177
Joined: Sat Oct 10, 2009 6:33 pm

Re: New Netburner MOD5270 carrier board does it all!

Post by Vernon »

https://www.youtube.com/watch?v=DWnkZP2olU0
This video shows my Netburner MOD5270 carrier board controlling an "Ad Hoc" RC servo from a web page. Since RC servos are not that powerful - I designed a circuit board that mounts on a $2.25 Ebay L298 H bridge module and forms a more powerful servo driver. The servo is made from a gear motor and a multi turn 5K feedback potentiometer. One could also use an automotive wiper motor or any other variant of nominal 30 to 150 RPM gearmotor. I have a potentiometer that adjusts deadband to compensate for high inertia loads. Animatronics over the internets!
Vernon
Posts: 177
Joined: Sat Oct 10, 2009 6:33 pm

Re: New Netburner MOD5270 carrier board does it all!

Post by Vernon »

https://www.youtube.com/watch?v=lN6iZltqKIE

There is the Internet of Things and there is the internet of YUUGE 43 AMP things. Got a 43 AMP H bridge on E-bay and am using it to drive the gear motor servo. My servo to H bridge driver board is really an awesome device - I am naming it my invention of the month. Note that the rated maximum voltage of the bridge is 45 volts. That is a maximum load power of 1935 watts or 2.6 horsepower. I would conservatively apply it at 24V and 20 AMPS or .64HP. Video above shows DCC railroad operation, the servo drive, and the web page - and of course the web page communicates with the Netburner via both AJAX (servo position) and ordinary HTML pages with attached ?XXX parameter calls (locomotive).
Vernon
Posts: 177
Joined: Sat Oct 10, 2009 6:33 pm

Re: New Netburner MOD5270 carrier board does it all!

Post by Vernon »

https://www.youtube.com/watch?v=5ZYEWnERdI4

This video shows my new MOD5270 carrier board in action - controlling the worlds only and greatest DCC Internet Model Railroad. I also demonstrate machine vision train control - no wires, no sensors, just one cheap analog camera and my machine vision circuit board (carries a MOD5213). It sends precise location data to the MOD5270 via RS-232.
Vernon
Posts: 177
Joined: Sat Oct 10, 2009 6:33 pm

Re: New Netburner MOD5270 carrier board does it all!

Post by Vernon »

https://www.youtube.com/watch?v=YFl5tx-JQaI

Built a second example of my Netburner MOD5270 carrier board (the first one is now attached to the model RR) and in the above video I operate a wiper motor that I turned into a servo - I control it using a slide bar in a web browser. As previously noted I built a circuit board to provide logic drive to an H bridge and essentially make any gearmotor with a feedback potentiometer into a servo. The potentiometer drive in this example is kind of crude - I have since found a better way using Actobotics parts and that will be coming soon.
Vernon
Posts: 177
Joined: Sat Oct 10, 2009 6:33 pm

Re: New Netburner MOD5270 carrier board does it all!

Post by Vernon »

The servo control uses the M51660L servo chip shown in the pictures. It is usually applied to drive small model airplane RC servos and incorporates an H bridge with external PNP high side transistors as shown. I also show my modification in which I just use the lower half of the H-bridge (that is in the chip) with 1K pull up resistors to generate logic signals which can drive BTS7960B or L298 H bridges. The bridges are available on Ebay cheaper than you can make them. If you want bare or completed circuit boards I can make you a deal !

The bottom picture is the original - the top the modification. Ignore the Schmitt triggers - they were deleted.

Note that instead of the 1K resistor between pin 9 and 11 I use a 470 ohm in series with a 2K pot. This allows tuning of the deadband. The 5K pot is the feedback potentiometer driven by the servo motor.
Attachments
servochip.jpg
servochip.jpg (62.01 KiB) Viewed 10206 times
servo-control-circuit.jpg
servo-control-circuit.jpg (44.71 KiB) Viewed 10206 times
Vernon
Posts: 177
Joined: Sat Oct 10, 2009 6:33 pm

Re: New Netburner MOD5270 carrier board does it all!

Post by Vernon »

https://www.youtube.com/watch?v=wWCekTjbEaU

It is a crane!

Monster wiper motor servo, using web slider control and my MOD5270 Superboard, lifts a 15 pound tool box from the end of a 3.8" arm! That is 900++ inch ounces and (probably) around 13 AMPS (I didn't have the meter on it but I have seen 12A peak starting with a big error signal). Servo city has one that is more powerful - but it costs $425. The wiper motor, this is the VW wiper motor, costs about $25 on Ebay. I think I originally said Dodge (I have a Dodge part and it is almost exactly the same) but this is the VW. The bridge is $11 and my circuit board is $40 if I make it. The potentiometer drive depends on your creativity - but that is a lot of power on the cheap.

You don't get a Netburner so you can put a picture of your dinner on a web page - Hostingplex or Facebook does that. A Netburner is best used to gather data and perform control action in the real world. And this board and it's accessories give you that capacity!
Vernon
Posts: 177
Joined: Sat Oct 10, 2009 6:33 pm

Re: New Netburner MOD5270 carrier board does it all!

Post by Vernon »

https://www.youtube.com/watch?v=jnxLd9tcthI

Gamepad control!

This video shows control of the Wiper Motor Monster servo using a Logitech gamepad in Chrome! The Internet of Things at your thumbs!

And don't forget - the Superboard would control 16 of these. Given some mechanical work you could throw balls to your dog while you are at work. Depending on your boss of course. I am retired so I don't have to worry.
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