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HB-25

JeffA1JeffA1 Posts: 7
edited 2006-05-18 02:51 in General Discussion
Hello,
I am new to Parallax and did some searching for info on the HB-25 Motor Controller in the forums. Could someone point me to any info on using an RC transmitter and receiver as used for model airplanes and connecting the receiver to a HB-25 to do tank type steering?
Thanks,
Jeff

Comments

  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    edited 2006-05-12 15:01
    Jeff,

    ·· I have done this very thing with a Tank Robot we have here at Parallax.· Use the following attached code.· The code tells you where to connect the channels from the R/C Receiver.· As for the HB-25 just connect the other two ports to the ones on your left/right motors.· I will post more pics soon.


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    Chris Savage
    Parallax Tech Support
    csavage@parallax.com
    P3100001.JPG
    2816 x 2112 - 1M
    bs2
    bs2
    rcboebot.bs2
    2K
  • JeffA1JeffA1 Posts: 7
    edited 2006-05-12 17:05
    Thanks for the reply Chris. I really appreciate your help.

    Jeff
  • JeffA1JeffA1 Posts: 7
    edited 2006-05-12 17:14
    My choice of a model airplane transmitter and receiver was a poor choice of words. I had ment to say tank type transmitter and receiver.

    Chris, in your program example, you are programming the HB-25?

    Thanks,

    Jeff
  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    edited 2006-05-12 17:41
    Jeff,

    ·· I don't know what the difference is in the type of transmitter.· As you can see from the photo the transmitter I am using is a standard 4 channel R/C Airplane Transmitter set to ground frequencies.· The code I posted mixes the channels so that one stick on the transmitter handles skid-steering on the tank treads.· Other transmitter configurations may or may not work.· If you have two sticks that output standard R/C pulse train then your receiver outputs could just go dircectly to the HB-25.· One output to each HB-25.· So to answer your other question, yes I am sending the mixed servo pulse data directly to two HB-25 Controllers.

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    Chris Savage
    Parallax Tech Support
    csavage@parallax.com
  • JeffA1JeffA1 Posts: 7
    edited 2006-05-12 17:56
    Thanks Chris! I will be ordering a couple of the HB-25's. Very cool stuff.
  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    edited 2006-05-12 19:15
    Jeff,

    ·· Great, you'll have to post your results once you've got everything working.· The Tank in the Photo is a very popular tank that's been hacked by many on the internet.· The HB-25 Controllers are not being pushed anywhere near their limit in this application, but when you consider the motors were Relay-Driven (read: no speed control) and that the original control system was very unreliable then it makes sense to use such a nice platform for hacking and showing off the HB-25 and BASIC Stamp.· Yes, it has BASIC Stamp control as well.· Features being implemented include compass/GPS navigation, accelerometer tilt prevention, object tracking using two PING))) sensors and object avoidance using two Sharp IR Sensors.· Of course the BASIC Stamp has control of the turret as well.

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    Chris Savage
    Parallax Tech Support
    csavage@parallax.com
  • JeffA1JeffA1 Posts: 7
    edited 2006-05-12 19:35
    Basically all I want to do is replace me behind my push mower with a detachable two wheel assembly that will be controlled by me via a RC transmitter using track type steering. And hopefully it·will·really tick-off the neighbors! Haha
  • bulkheadbulkhead Posts: 405
    edited 2006-05-13 04:44
    One problem with using a 4 channel airplane transmitter is the left vertical joystick is for throttle, and does not rebound back to center position. If you don't mix your signals, driving could be hard this way. A simple solution would be to get a 2 channel radio(pistol grip would work) and use a basic stamp to mix the signals, so it drives like a normal RC car.

    What type of motors do you plan to use for drive?
  • JeffA1JeffA1 Posts: 7
    edited 2006-05-13 14:32
    Hi Bulkhead,

    I made a mistake when I mentioned the airplane receiver. I will be using track type steering transmitter and receiver. If I am understanding correctly, I will need to connect the outputs of the receiver to a BS2 and then connect the outputs of the BS2 to the HB-25. And use·code like the one Chris posted to program the BS2?

    I have several DC motors. The two I am thinking of using are 24VDC gearhead 1/4 HP. somewhere around 80 RPM. I don't think a lot of power is needed since the battery powered cars that kids drive around don't have real powerful motors in them. And some of the kids weigh more than a push mower.

    I will be removing the rear wheels of the mower and replacing the front ones with 360 degree swivel wheels. The motor and electronics assembly will fasten to the rear of the mower in a way that can be easly removed. In the winter i will use the assembly mounted to a snow pusher.

    Yes, my back is going to love me!

    Thanks,

    jeff
  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    edited 2006-05-13 22:39
    Jeff,

    ·· You mentioned you will be using 24VDC motors.· Just in case I wanted to remond you that the maximum input voltage on the HB-25 is 16VDC, nominally 12VDC.

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    Chris Savage
    Parallax Tech Support
    csavage@parallax.com
  • JeffA1JeffA1 Posts: 7
    edited 2006-05-13 23:40
    Thanks Chris, I will use 12vdc.
  • bjhamltnbjhamltn Posts: 21
    edited 2006-05-17 22:20
    Does Parallax have any plans on releasing a 24Vdc version of the HB-25?
  • Tim-MTim-M Posts: 522
    edited 2006-05-18 02:51
    bjhamltn said...
    Does Parallax have any plans on releasing a 24Vdc version of the HB-25?
    · I think this would have been better suited as a new thread, but I would be very interested in a voltage increase·for the HB-25 too.··24VDC capacity·would be a wonderful line-up with light industrial applications and broaden the market for that controller as well!

    Tim
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