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HI Check for a short between pin 11 of the 'hc374 and +5V. Pin 11 is supposed to be connected to pin 9 of the 'hc138. It is the select line for the 8 flip-flops in the 374. If you have a logic probe, check either of these pins. They should be (...) (28 years ago, 15-Jul-96, to lugnet.robotics.handyboard)
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| | HB
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(...) connections so i am at a loss for knowing which leads to test. (...) (28 years ago, 15-Jul-96, to lugnet.robotics.handyboard)
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| | tables
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Hi, Can anyone tell me how to store a big table of data that the handy board has collected into a file for permanent storage? Thanks, -Dirk (28 years ago, 13-Jul-96, to lugnet.robotics.handyboard)
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| | IC memory map
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(...) Right now, IC reserves 16k for shared code and data space. 8k is for the multitasking stacks and interaction download space, and 8k is for pcode. -- Randy (28 years ago, 12-Jul-96, to lugnet.robotics.handyboard)
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| | Re: Malloc
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8K might be all that IC allows for user global data. The memory map can be rearranged, but only at the compile-time of the IC application. Newton Labs should be able to give you a definitive answer about the memory organization of IC 3.1. -Fred In (...) (28 years ago, 12-Jul-96, to lugnet.robotics.handyboard)
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| | Malloc
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I'm trying to allocate three large arrays to store data in... Such as the following declared globally: char stoA(4000); char stoB(4000); char stoC(4000); and then some code...not very long, just to capture data and store it in these arrays from the (...) (28 years ago, 12-Jul-96, to lugnet.robotics.handyboard)
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| | Re: status of the expansion board
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Hi I think that Fred's idea for the expansion board is OK, but I'd also like to see a "bare-bones" expansion board for those hardware hackers amongst the HB community. What I mean is just a simple board with a few more analog input's, and two sets (...) (28 years ago, 12-Jul-96, to lugnet.robotics.handyboard)
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| | Re:
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(...) search on "h-bridge" they have a H-bridge that can handle 3A @ 55vdc. I don't know if it can be piggybacked with driver transisters or not but the wonderfull part is if you would like they will send you FREE samples (3ea at a shot, with up to (...) (28 years ago, 12-Jul-96, to lugnet.robotics.handyboard)
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| | (no subject)
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(...) No, it will use just one '374 enable. -Fred (28 years ago, 12-Jul-96, to lugnet.robotics.handyboard)
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| | Re: status of the expansion board
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(...) . . . (...) Where can we find out more about the LEGO sensors? Are they part of some specialized kits? Do they sell them individually? Is there an online catalog? (28 years ago, 11-Jul-96, to lugnet.robotics.handyboard)
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