 | | Re: Using cheap RC chasis as 'bot
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(...) This would be great! I've always known that my mechanical skills were nowhere near as good as my electronic/programming skills, and getting a suitable base set up is a formidable problem for me. Something like what you propose would be the (...) (29 years ago, 6-Feb-96, to lugnet.robotics.handyboard)
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| | Re: Using cheap RC chasis as 'bot
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(...) The biggest problem with tank like drives is the marks/scratches on the floor. Any robot with any weight will probably damage a maple or other hardwood floor in short order. They work fin in a lab with waxed tile floors that no one cares (...) (29 years ago, 6-Feb-96, to lugnet.robotics.handyboard)
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| | Re: Using cheap RC chasis as 'bot
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OK, time for me to chime in on this thread... The biggest problem, IMHO, with using a cheap RC car/van/truck as a 'bot base is that they all use Ackerman steering (two non-steerable driven wheels in the back, two linked, steerable, non-driven wheels (...) (29 years ago, 6-Feb-96, to lugnet.robotics.handyboard)
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| | Connected Radioshack truck
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like Ram, I connected successfully a radio shack RC truck (4WS) to the handy board. for the DC motor controlling forward and backward speed, I found the 2 entries of the h bridge connecting the motor. I replaced the cheap front end steering servo (...) (29 years ago, 6-Feb-96, to lugnet.robotics.handyboard)
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| | Using cheap RC chasis as 'bot
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Hello All, Concerning the thread of RC chasis with the handyboard, I've done that (albeit with the 6.270 board) and found that it was not that tough. I was fortunate to find a decent RC van setup for only $20. It was some time past Xmas of last year (...) (29 years ago, 6-Feb-96, to lugnet.robotics.handyboard)
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| | Re: battery voltages
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Where on the Handy Board would you plug the 6V into? and what is the J13 connector for? -John (...) (29 years ago, 6-Feb-96, to lugnet.robotics.handyboard)
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| | Re: hmph
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why not use the cars drive electronics, just bypass the radio part, it would take a little work to find the points where the motors are turned on, but it should work. Just watch out for other people with remote control units. (...) (29 years ago, 6-Feb-96, to lugnet.robotics.handyboard)
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| | Enable interrupts within IC?
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Hi all, I'm trying to use IC to poke in an interrupt routine (the IC3 interrupt from pin PA0) assembled using PCBUG11 at $B600. I can set all the register bits correctly, but I can't execute the CLI (general interrupt enable) HC11 opcode from within (...) (29 years ago, 6-Feb-96, to lugnet.robotics.handyboard)
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| | driving 3v motors
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(...) The best solution here is to replace the HB's 9.6v batt with a 6v one. Once you get past the L293's, you'll be giving around 4v to the motors, which should be fine. -F (29 years ago, 5-Feb-96, to lugnet.robotics.handyboard)
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| | Re: Some quest. for details
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(snip) (...) You will tend to get a lot of flickering if you do not place a sleep() command in your loop that writes to the screen because the screen is being redrawn too quickly. Tom ___...___ Tom Cicatelli cica@tiac.net Melrose, Massachusetts (...) (29 years ago, 5-Feb-96, to lugnet.robotics.handyboard)
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| | Some quest. for details
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Hi there, last week I've got my HB up and running and it works very fine. I've been playing around with it IC and some questions came up. I hope they are not too boring: - I don't know exactly in which manner sleep() works. It looks like being a mix (...) (29 years ago, 5-Feb-96, to lugnet.robotics.handyboard)
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| | Re: resistors w/motors?
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At 1:43 PM 2/4/96, Jeffrey Keyzer wrote:>> (...) How about using some power zener diodes to drop the voltage: |----[-power diode+]----[+zener diode-]------| L293D ----| |------| | |----[+power diode-]----[-zener diode+]------| | | [motor] | | (...) (29 years ago, 5-Feb-96, to lugnet.robotics.handyboard)
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| | 3V motors w/handy board
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Perhaps it would be best if first I could find a solution to this problem - What's the best way to drive 3V motors with the handy board? If I can solve this, I can really broaden my horizons as to the types of things I can use with the handy board. (29 years ago, 5-Feb-96, to lugnet.robotics.handyboard)
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| | Re: hmph
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(...) Be careful. Cheap RC cars tend to use 3v motors that want to draw a fair bit of current. Expensive RC cars use motors in a better voltage range for the HB (.e.g, 8.4 or 9.6v), but they draw serious current (5 to 10A easy). -F (29 years ago, 5-Feb-96, to lugnet.robotics.handyboard)
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| | Re: resistors w/motors?
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(...) The problem with that solution is that the motors are driven bidirectionally - a regulator wouldn't work when the polarity it was given was reversed. (29 years ago, 4-Feb-96, to lugnet.robotics.handyboard)
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| | resistors w/motors?
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I'm curious - can I limit the voltage to a motor by putting a resistor in series with it? What are the pros and cons of this solution? I have a bunch of low voltage (3V) motors that I'd like to be able to use with the handy board, but giving them (...) (29 years ago, 4-Feb-96, to lugnet.robotics.handyboard)
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| | Re: hmph
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(...) That's a definite possibility. However, I'm looking more for something that has a tread-type drive system, though two independently driven wheels is fine. That allows me to simplify steering the robot, so that I can rotate it at a point. (...) (29 years ago, 4-Feb-96, to lugnet.robotics.handyboard)
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| | Re: hmph
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(...) How about buying a $15 RC car from radio shack and adding a $15 servo to do the front steering? I haven't tried it. I'm using RC-10 cars and they're GREAT. Independent suspension, hispeed, good traction... but several hundred dollars. -- (...) (29 years ago, 4-Feb-96, to lugnet.robotics.handyboard)
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| | Re: HB died - HELP
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Keith, You may have shorted something out while connecting up the battery. I've seen this before, and parts do fry if you connect them to 9.6v. If while you had the battery ground lead connected, you just brushed the +v lead onto some pins, that (...) (29 years ago, 4-Feb-96, to lugnet.robotics.handyboard)
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| | HB died - HELP
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HELP . . . My HB has stopped going into bootstrap mode. Hope someone out there can help!!! The HB had been working fine. I was having fun with IC, and I finally got around to the Fuse and Battery final assembly (Part 6 of the assembly instructions). (...) (29 years ago, 4-Feb-96, to lugnet.robotics.handyboard)
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