 | | 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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