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Hi, I am trying to install the polaroid 6500. I use the schematics I found with the sonar.c file at this site. It doesn't work, I dont understand the Motor power connection why does it have 4 pins ? One motor only uses 3 pins ? I think the sonar (...) (28 years ago, 26-May-96, to lugnet.robotics.handyboard)
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| | Re: pcode, libraries for two servos
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(...) Randy, I'm having trouble making the TOC2 work with Pcode_hb, something trashes the output whether I disable IR-Xmit or not. Do I need a new Pcode in order to divert TOC2 to my own use? I'm treating OC2 the same as I treat OC3, but only OC3 (...) (28 years ago, 25-May-96, to lugnet.robotics.handyboard)
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| | Re: Fuse on motor power cables
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(...) All system power, incl. motor pwr, already runs through the existing polyswitch. They're not too fast, so I'm not sure if they'll save you. the motor chips do have over-current protection of their own, though it has been known to fail from (...) (28 years ago, 24-May-96, to lugnet.robotics.handyboard)
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| | Fuse on motor power cables
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My current robot platform is a hacked toy and does not have ideal motors. I am concerned about toasting my motor driver chips. Can I put a polyswitch fuse in series in the motor lines to protect against this? They don't seem to be polarity (...) (28 years ago, 24-May-96, to lugnet.robotics.handyboard)
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| | expansion board
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Hi all, I have not worked with the handy baord much yet but I also feel that it would be nice to have a few more digital i/o ports available. I guess that is short, sweet, and to the point. sherman@plains (28 years ago, 23-May-96, to lugnet.robotics.handyboard)
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| | Wish list, or expansion possibilities...
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Hi, I am new to the handyboard area, having spent most of my project time with 68705 series uP's and 80X51's (done hate me.). Just tossing out some possibilities and not trying to down-play any other ideas that have preceeded me.... An expansion (...) (28 years ago, 23-May-96, to lugnet.robotics.handyboard)
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| | Re: PC serial connection
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(...) COM 2 is used by the modem card. I don't even know tyhough how to make COM 2 point to the slot I want, which is my initial problem anyways ( I need a 25-pin slot for the serial connection). Sincerely, Yoni Garbourg << To succeed, Atificial (...) (28 years ago, 22-May-96, to lugnet.robotics.handyboard)
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| | Re: Expansion interface status
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(...) You might want to note that the unexpanded HB is capable of driving a Polaroid sensor. The second motor chip is removed, and lines are plugged into different pins for the BINH and INIT signals, while the ECHO signal goes to the first digital (...) (28 years ago, 22-May-96, to lugnet.robotics.handyboard)
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| | Re: Expansion interface status
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Another thought, how about a series of expander boards. I know this could get really ugly, but, maybe Fred, and the normal HB distributors build what they see are appropriate for their customers, and others build what is appropriate for their (...) (28 years ago, 22-May-96, to lugnet.robotics.handyboard)
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| | PC serial connection
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Hi. I just got my hands on a new HB and I'm using a 100 MHZ DX PC. Hardware-wise, there's a perfect slot for the serial connection on my computer, which is not occupied. I hookes the serial connection to it and tried to download IC using COM port 4 (...) (28 years ago, 22-May-96, to lugnet.robotics.handyboard)
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| | Re: Expansion interface status
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(...) To Fred and others, I've been thinking about this off and on for over a year now, and since I now have parts I'll finally get my HBs into something more than just board status. Robots eat I/O pins for lunch. Sensors eat input pins and (...) (28 years ago, 22-May-96, to lugnet.robotics.handyboard)
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| | Re: Expansion interface status
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Do you think Scott Edward would consider selling just the processor? The expansion board could be made to accept Scott's processor or an unprogrammed one if someone had a different application. Which processor does he use anyway? The other thing (...) (28 years ago, 22-May-96, to lugnet.robotics.handyboard)
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| | Re: 6 servos and RS232...
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(...) From memory of my designer engineer days, the EIA RS232 specification quotes something along the lines of: logical level RS-232 level zero or idle -3V to +15V one +3V to -15V The spec gave maximum slew rates for signals and such specifics such (...) (28 years ago, 22-May-96, to lugnet.robotics.handyboard)
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| | RE: 6 servos
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You can hook it directly to a PC serial port. Here is the note on it: 1.Controls eight hobby (R/C) servos. 2.Opto input takes RS-232, -422,-485, CMOS and TTL. 3.Baud rate configurable for 2400 or 9600. 4.Addressable up to 32 controllers on one port. (...) (28 years ago, 22-May-96, to lugnet.robotics.handyboard)
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| | Re: 6 servos
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(...) Just to make sure it wasn't a typo...so, the TTL level is "ative low"? Also. Does the Scott Edwards board have the ability to be connected to a computer? or do you need a "TTL to RS232 converter"? (28 years ago, 22-May-96, to lugnet.robotics.handyboard)
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| | Re: Expansion interface status
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(...) Build a 68360 in the expander board, that'll get ethernet, and multiple SCI ports. All the IO anyone should ever need. :-). (28 years ago, 22-May-96, to lugnet.robotics.handyboard)
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| | RE: Expansion interface status
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While I welcome the small kits, they introduce interface issues for beginners, especially if there are multiple kits attached simultaneously - seems like this is a problem the expansion board should be solving rather than causing. The value I am (...) (28 years ago, 22-May-96, to lugnet.robotics.handyboard)
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| | FW: 6 servos
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RS232 is +12 and -12, but most serial ports can work correctly even if the signal is 3 to 5v. I regularly use 3 to 5v level serial signals. If you need to convert low voltage serial to RS232 specs, you can use a chip like Maxim's 232 - see (...) (28 years ago, 22-May-96, to lugnet.robotics.handyboard)
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| | Re: 6 servos
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(...) There are two types of serial voltages: TTL level and RS-232 level. The HB's serial interface board converts from TTL to RS-232 for communicating with the host computer. The Scott Edwards board accepts TTL levels, so an HB pin can drive it (...) (28 years ago, 22-May-96, to lugnet.robotics.handyboard)
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| | Re: 6 servos
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(...) Are the digital outputs at 5v high? I think you mentioned on the HB homepage about the serial interface converting RS232 levels at +12 and -12v to TTL levels (5v). I'm not that familiar with the nitty gritty of RS232 so this kinda puzzles me. (...) (28 years ago, 22-May-96, to lugnet.robotics.handyboard)
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