 | | Please help me.
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Hello all. I have just begun 68HC11 study. So, everyone has a question. 1. I want to know how to change hex file to motorola s19 file. 2. I want to know where it is free disassembler for 6811. Please help me!! Yoshi astronauts@mail.goo.ne.jp (25 years ago, 27-Apr-99, to lugnet.robotics.handyboard)
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| | GCC/HC11
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Just to let everyone know: I think I may have found a new compiler bug with the GCC/HC11 C-compiler. When I did this: c = d = serial_getchar(); My program didn't work correctly. If I did this instead: c = serial_getchar(); d = c; It worked fine. (...) (25 years ago, 26-Apr-99, to lugnet.robotics.handyboard)
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| | doc info
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I am buliding my own handy board and I having difficulty downloading the "Assembling The Handy Board" file off the web site. Does anybody know any other way to obtain this document? Fred (25 years ago, 26-Apr-99, to lugnet.robotics.handyboard)
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| | CMOS CAMERA
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Anynoe did connect a CMOS camera to Handy Board ? Is possible ? (25 years ago, 26-Apr-99, to lugnet.robotics.handyboard)
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| | Re: IR test reports "Rubbish" when I run test.c
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Test.c expects to see both short and long pulses of IR, and it tries to accept timings from any remote. It times the signals it receives and records the lengths of the shortest and longest pulse. It then uses the midpoint of these values as a (...) (25 years ago, 24-Apr-99, to lugnet.robotics.handyboard)
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| | Re: handyboard clock speed
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(...) Not going to mention the free Otto/Steven/Keith/Curt GCC-2.8.1 HC11 port? I'm hurt. ;-) Maybe you need to add my web & ftp pages to your free software page, now that I have a GCC Handyboard library available? GCC/HC11 patches are available (...) (25 years ago, 23-Apr-99, to lugnet.robotics.handyboard)
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| | Re: handyboard clock speed
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(...) yes, this is right. the fastest you can go with the 52-pin 6811s is 12 MHz crystal --> 3 MHz system clock (i'm pretty sure). so this is only 1.5x over the stock HB. so you've got the issue Curt pointed out with not only the downloader, but (...) (25 years ago, 23-Apr-99, to lugnet.robotics.handyboard)
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| | Re: handyboard clock speed
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(...) From the data books for the 68HC11, if you have any version of the E-series (except for perhaps one, a low-power version?), you can run them at up to a 3MHz E-clock (12MHz crystal). I haven't looked at the rest of the handyboard schematic with (...) (25 years ago, 23-Apr-99, to lugnet.robotics.handyboard)
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| | IR test reports "Rubbish" when I run test.c
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When I try to get the values for my IR transmitter the test.c reports that it is a bad. It calls it 'rubbish' why would that be? -Peter (25 years ago, 23-Apr-99, to lugnet.robotics.handyboard)
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| | RE: Electrolytic Capacitor Ratings [was Re: Choosing Parts?]
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Sorry, no. The breakdown occurs purely from the dielectric material. Remember lightning? You don't all of a sudden see the clouds come crashing down to the ground and then have a discharge. (...) (25 years ago, 23-Apr-99, to lugnet.robotics.handyboard)
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| | Re: Faulty Digitals
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it might be the processor, but more likely there is a board short connecting the dig ins to ground (input 7) and pwr (input 8). measure resistance between the inputs and the gnd and pwr rails to check. fred (...) (25 years ago, 23-Apr-99, to lugnet.robotics.handyboard)
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| | Electrolytic Capacitor Ratings [was Re: Choosing Parts?]
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Date: Thu, 22 Apr 1999 13:21:14 -0700 From: Chuck McManis <cmcmanis@mcmanis.com> Kind of. Electrolytics are indeed made by plates in a conductive solution, however when the voltage increases, it pulls the plates together (standard columbs law (...) (25 years ago, 22-Apr-99, to lugnet.robotics.handyboard)
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| | Faulty Digitals
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Greetings all! I've got a Handy Board with the expansion board, and the first and second digital ins (digitals 7 and 8) aren't working. 7 is stuck in 0, and 8 is stuck in 1. I replaced everything on the board but the processor itself, and I'm not (...) (25 years ago, 22-Apr-99, to lugnet.robotics.handyboard)
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| | Re: Electrolytic Capacitor Ratings [was Re: Choosing Parts?]
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(...) Also (generally) usually less than 1uf (...) and generally >= 1uf (25 years ago, 22-Apr-99, to lugnet.robotics.handyboard)
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| | Re: Electrolytic Capacitor Ratings [was Re: Choosing Parts?]
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Kind of. Electrolytics are indeed made by plates in a conductive solution, however when the voltage increases, it pulls the plates together (standard columbs law stuff). When you exceed the rated voltage the force on the plates is enough to pull the (...) (25 years ago, 22-Apr-99, to lugnet.robotics.handyboard)
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| | Re: Electrolytic Capacitor Ratings [was Re: Choosing Parts?]
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Generally, cost, accuracy, size, and drift. Ceramic caps are expensive ($/pf) reasonably stable across temperature and acceptably accurate. Electrolytic capacitors are cheap ($/pf) only moderately stable across temperature changes, polarized, and (...) (25 years ago, 22-Apr-99, to lugnet.robotics.handyboard)
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| | smooth PWM!!!...!!!
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hi everyone, i like to ask something on the PWM of the handboard. if i only do a command: motor(2,50); motor(3,50); i will get a smooth PWM of 500 Hz of waveform.( -_-_-_-_ something like this) but if i implement the above command into a program (...) (25 years ago, 22-Apr-99, to lugnet.robotics.handyboard)
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| | Re: Electrolytic Capacitor Ratings [was Re: Choosing Parts?]
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As long as we are talking about caps, I cannot find the information about why one uses tanatlum caps vs ceramic caps vs electrolytic. What are the differences between the various types? Thanks, Gary Livick (25 years ago, 22-Apr-99, to lugnet.robotics.handyboard)
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| | Re: I hope someone can help me...
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(...) If it is the note I posted, also get the followup. The initial post I think I made a couple errors, and then someone said their chips got hot :-o. Anyway a followup post corrected the information. (...) If you look at the pinouts for the 293 (...) (25 years ago, 22-Apr-99, to lugnet.robotics.handyboard)
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| | RE: Electrolytic Capacitor Ratings [was Re: Choosing Parts?]
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Sorry to say, but the capacitance does change depending upon the applied voltage. As you increase the plate voltage a force is created pulling the plates together. This effectively INCREASES the capacitance. The good news is that this enhancement is (...) (25 years ago, 22-Apr-99, to lugnet.robotics.handyboard)
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