 | | RFC: Mux schematic viability
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If anyone with electronics experience has a moment or two, I would be very grateful if they could take a look at (URL) This is a design based on the 4017/4066 multiplexer on Michael Gasperi's website except that I want to use BAT85 diodes rather (...) (24 years ago, 1-Oct-01, to lugnet.robotics.rcx)
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| | Re: Sending ir packets
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(...) Here ya go: Remember start bit (sometimes called 2 stop bit mode) 55 00 D1 ~D1...Dn ~Dn C ~C Add all the normal D parts in a single Byte for Chksum. Code chunk for example ... unsigned char MuxStr[] ={0x55,0xf7,0x08,0x0...xf8,0x07}; count = 7; (...) (24 years ago, 29-Sep-01, to lugnet.robotics.rcx)
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| | Re: Test
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Hi Paul, (...) Seen from my side: nothing! I just tried, and it went through as it should! Regards, Martin (24 years ago, 29-Sep-01, to lugnet.robotics.rcx)
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| | Re: Sending ir packets
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Check the source code for NQC (in rcx/RCX_Link.cpp), or even use it as your underlying comms library. You may spot something Dave does that you don't.. Phil. (...) (24 years ago, 29-Sep-01, to lugnet.robotics.rcx)
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| | Test
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I can't post anything to the Java news group. What's going on? (24 years ago, 29-Sep-01, to lugnet.robotics.rcx)
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| | Re: Psion 5mx firmware downloader
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(...) (snip account of fast download - thanks) (...) An electronics manufacturer. Specifically, in this case, manufacturer of a pda with a half-vga screen, a keyboard, built-in spreadsheet, word processing, email, databases etc.which is technically (...) (24 years ago, 29-Sep-01, to lugnet.robotics.rcx)
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| | Re: Psion 5mx firmware downloader
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(...) As far as I know, the fast downloader is not documented except as C code. There may also have been some posts to this newsgroup or the legos one back when that code was written. I forget whether Marcus and I discussed this more by e-mail or by (...) (24 years ago, 29-Sep-01, to lugnet.robotics.rcx)
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| | Psion 5mx firmware downloader
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I've written a firmware downloader that runs on a Psion 5mx (and probably an older 5, but I haven't tested it). I should note this uses the IR tower connected to teh cable serial port (via lego's cable, psion's cable and a null modem adaptor, (...) (24 years ago, 29-Sep-01, to lugnet.robotics.rcx)
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| | Re: RCX sensor interfaces - diodes
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I think the real point here is that it is usually necessary to incorporate a bridge network of six diodes to interface to the RCX sensor inputs. The signalling current must pass through at least two series diodes to get to the RCX terminals - a (...) (24 years ago, 28-Sep-01, to lugnet.robotics.rcx)
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| | Re: RCX sensor interfaces - diodes
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The main advantage of the BAT85 is the lower voltage drop (about 0.3 Volt against 0.7 Volt for the 1N4148). (...) (24 years ago, 28-Sep-01, to lugnet.robotics.rcx)
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