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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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fred
(score: 0.975)
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| | Re: Handyboard assembly problem fixed
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| Dear Fred: No, we went through the assembly following your directions step by step. By the statement " Board OK", I meant that the tests upto the point of downloading pcode (second time with LCD in) tested OK. I did not want to bore the audience (...) (29 years ago, 7-Mar-96, to lugnet.robotics.handyboard)
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fred
(score: 0.974)
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| | Re: Reflectance sensor
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| You can use either. The 180 ohm resistor will make the output LED brighter, which is generally better, unless you make it so bright as to reduce its lifespan. -Fred ---...--- (...) (28 years ago, 22-Nov-96, to lugnet.robotics.handyboard)
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fred
(score: 0.974)
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| | Re: sonar
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| (...) yes. the polaroid board is pretty sophisticated, really, in that it ramps up the input gain the longer it waits for the ultrasonic reflection pulse. this compensates for the exponential falloff in "volume" as sound disperses on the way out and (...) (28 years ago, 18-Nov-96, to lugnet.robotics.handyboard)
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fred
(score: 0.974)
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| | 5mm range reflectance sensor
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| Hello, I've got a 5mm range reflectance sensor which I am trying to get to work with the handyboard, without much success. Here is what I have: DigiKey part #: OR506-ND Manufacturer #: EE-SB5V The labels on the leads are as follows: .--- (+) .--, / (...) (29 years ago, 8-Feb-96, to lugnet.robotics.handyboard)
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fred
(score: 0.974)
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| | (no subject)
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| this could also be a problem with the cable betw the interface/charger and the host computer. does the green led on the interface go on when plugged into the host CPU? if not, this is indicative of such a cable probl. however, the pwr light on the (...) (28 years ago, 19-Nov-96, to lugnet.robotics.handyboard)
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fred
(score: 0.974)
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| | Re: Adding a brain to the handy board
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| (...) Not necessarily. The mini-robots project at the University of Minnesota, Minneapolis, has used a 68HC11-based board for vision processing. The boards were designed and built by an undergraduate working for the Artificial Intelligence (...) (29 years ago, 13-Feb-96, to lugnet.robotics.handyboard)
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fred
(score: 0.974)
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| | RE: motor control
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| There is no recommended way. I've got a pretty simple bipolar H-bridge design that you can connect up pretty easily using an opto isolator and get 3 - 6amps of control and software compatibility. Unfortunately I'm not in the kit business nor do I (...) (29 years ago, 23-Feb-96, to lugnet.robotics.handyboard)
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fred
(score: 0.974)
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| | I need two servo signals...
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| I really need two servo-out signals. I got one working just fine with the standard servo code and output to digital pin 9. I was thinking I could just adapt the servo code for another port, but I don't know what other port I can use. Currently, I (...) (29 years ago, 16-Feb-96, to lugnet.robotics.handyboard)
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fred
(score: 0.974)
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| | Probs w/ as11_ic in MSDOS?
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| Hi all, I'm trying to compile an interrupt routine into an .icb file. However, when I run the as11_ic.bat file on my MS-DOS 286 machine, the routine hangs on the first gcc command. No errors, just goes away forever. Has anyone else run into this? I (...) (29 years ago, 17-Feb-96, to lugnet.robotics.handyboard)
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fred
(score: 0.974)
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| | hbdl doesn't work?
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| I successfully downloaded hbdl (thanks for fixing it, Fred!) and ran into some problems when trying to use it. When I try to download a file to the board, as soon as I click "yes" that the board is ready, the program tells me that the board is in (...) (29 years ago, 9-Mar-96, to lugnet.robotics.handyboard)
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fred
(score: 0.974)
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| | 6V question - is this OK?
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| Is this OK for getting 6V to motors connected to the L293s? I tapped off the center of the battery back and get about 6V. I then soldered a wire at that point on the battery pack and then soldered the other end to pin 8 (Vs) of each of the L293s (I (...) (29 years ago, 20-Feb-96, to lugnet.robotics.handyboard)
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fred
(score: 0.973)
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| | DL problems
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| Hi everyone, I've noticed problems with both DL and DLM in certain situations too. At first I used to think that I made a mistake in configuration or ruined a controller somehow. Over time, however, I realized that these programs were finicky about (...) (29 years ago, 21-Feb-96, to lugnet.robotics.handyboard)
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fred
(score: 0.973)
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| | Re: SPI header
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| The SPI (synchronous peripheral interface) does not do normal RS-232 (aka "asynchronous serial") in hardware. you must write an assembly language driver to do the timing. at some point in january i plan to release a 1200 baud output driver. if (...) (28 years ago, 3-Dec-96, to lugnet.robotics.handyboard)
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fred
(score: 0.973)
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| | HB design
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| I got my handyboard on Saturday, and followed the assembly instructions that Fred did, and was thoughoughly impressed. Fred, you did great work, and have really done a great service to all of us. Thanks. (28 years ago, 8-Apr-96, to lugnet.robotics.handyboard)
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fred
(score: 0.973)
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| | TOC 2 & 3
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| AAAARRRGGGHHHHHH!! After the pain of relearning assembler and getting interrupt routines to work, it seems my assumption of the availability of TOC 2 & 3 is incorrect. I need 2 (wanted 4) pulse trains to go out. According to the diagrams Fred (...) (29 years ago, 24-Mar-96, to lugnet.robotics.handyboard)
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fred
(score: 0.973)
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| | Re: Polyswitch Fuse
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| Not a real systematic one -- that seemed to be enough to let motors blast away, but stop real damage from happening if the nicad pack got shorted out. remember, shorting nicads is a real hazard - 50 to 100 amps -- could almost start a car. -fred (...) (28 years ago, 6-Dec-96, to lugnet.robotics.handyboard)
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fred
(score: 0.973)
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| | Re: SPI code
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| (...) Just to be clear: the code I have promised is 1200 asynchronous serial output from the HB (from a pin other than its built-in RS-232 out :-), *not* SPI code. Mike is correct in stating the place for info is the 6811 "pink book." See the HB (...) (28 years ago, 5-Dec-96, to lugnet.robotics.handyboard)
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fred
(score: 0.973)
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| | Re: more downloading
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| Hi Dave, can you try the DLM.EXE (not hbdl) program off the software resources web page? you will have to use the "-256" flag because it defaults to -512 for the e1 version of the 6811 which is probably not what you have. also, if you have windows (...) (28 years ago, 6-Dec-96, to lugnet.robotics.handyboard)
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fred
(score: 0.973)
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| | Re: (Handy-B) wrong connection...
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| (...) any normal cmos low power 28-pin (JEDEC standard) 32K RAM will work. You do not need a special battery backed variety. you also might have blown the 'hc373 chip, since that is part of the memory circuit. also check the 'hc132. hopefully the (...) (28 years ago, 6-Dec-96, to lugnet.robotics.handyboard)
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fred
(score: 0.973)
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