 | | More than 32Kb RAM?
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Hello, Does anybody know if it is possible to build a handyboard with more than 32Kb RAM? I do not know the exact details of processor, but if it is a 8-bit processor it should be possible to build a handyboard with a maximum of 256Kb memory! And (...) (26 years ago, 26-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Schematic, PCB freeware
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(...) Try this software: www.expresspcb.com Though, it doesn't have an auto route function, but this is good for simple pcb design. joema (26 years ago, 26-Feb-99, to lugnet.robotics.handyboard)
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| | Schematic, PCB freeware
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Does anyone know of a good but simple to use schematic an PCB design freeware program out there on the net?, I have downloaded a few but they vary complex and hard to learn for the simple board I need to create. I like something with a good (...) (26 years ago, 26-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Static sensitivity
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(...) You should probably ALWAYS assume that any IC is ESD (electro-static discharge) sensitive and take all precautions. Mike (26 years ago, 26-Feb-99, to lugnet.robotics.handyboard)
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| | RE: IR outputB
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(...) Of course... have you ever listened to your radio in the house before? (...) (26 years ago, 25-Feb-99, to lugnet.robotics.handyboard)
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| | (no subject)
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Has anyone hacked the sonar out of a sonar tape measure? Radio Shack sells sonar tape measures for about $25.00, that's half the price of buying the transducer and sensor together. I mentioned in a previous posting that I am interested in running (...) (26 years ago, 25-Feb-99, to lugnet.robotics.handyboard)
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| | Re: IR outputB
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(...) i do not have the Mobile robots inspiration book, but i think if you want to use it in a good way you will have to flash the right led for a time, check for reflection, then switch it of and check if there is also reflection (then it was (...) (26 years ago, 25-Feb-99, to lugnet.robotics.handyboard)
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| | RE: IR outputB
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I am looking at the Schematic in the HB HP right now. It looks like the 1K resistor is connected to the visible LED. From the schematic, it looks like you can connect a resitor and IR LED in series to the "3-pin female header" to make your (...) (26 years ago, 25-Feb-99, to lugnet.robotics.handyboard)
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| | RE: IR outputB
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I had intended the two types of interfaces for different purposes, but, I assume RF does not need line of site work. R/C cars for example can be controlled from several rooms away in my house (worked with one on a telepresence implementation). I (...) (26 years ago, 25-Feb-99, to lugnet.robotics.handyboard)
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| | RE: IR outputB
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The software written by Max Davies should allow transmission as well as receiving. The information that I have doesn't include the hardware layout but as far as I understand the 1K resistor in the IR transmission circuit on the board should allow an (...) (26 years ago, 25-Feb-99, to lugnet.robotics.handyboard)
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| | RE: IR outputB
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I heard that radio waves do not need "line-of-sight" like IR does. Can someone with more exerience verify or dispute this? It makes sense since longer wavelengths of EMR can bounce off surfaces easier. So maybe your Lynx device is better. ---...--- (...) (26 years ago, 25-Feb-99, to lugnet.robotics.handyboard)
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| | RE: IR outputB
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So, it seems like the short answer to this question is no one knows what to attach to correctly and safely (to prevent HB damage) allow IR transmissions from the HB :) I understand the receiving capabilities, as they are documented and have routines (...) (26 years ago, 25-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Another IC error: "Out of memory"
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Hi everyone: I went back and rethought this: (...) I played around it it some more, removed the 'scamper' gait, and got the size of code IC loads down to 12500 bytes, and the error is gone. I'm not sure if this means I have some 3k of variables, or (...) (26 years ago, 25-Feb-99, to lugnet.robotics.handyboard)
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| | Another IC error: "Out of memory"
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Thanks again for all the help with the "yacc" error I experienced before. I'm having new code resourcing problems now: mainly a problem with my 1994 version 2.851 interactive c. It loads my libraries, and I'm getting an error: "Out of memory (tried (...) (26 years ago, 25-Feb-99, to lugnet.robotics.handyboard)
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| | RE: IR outputB
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(...) It is not the bouncing off of things but the passing through them that makes RF able to operate without line of sight. Line of sight gives greater distances, though, even with RF. The Lynx Tx/RX will definately have a greater range than the (...) (26 years ago, 25-Feb-99, to lugnet.robotics.handyboard)
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| | Re: How to measure the signal Voltage ?
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not knowing anything about the sensor, but guessing (hoping) that it behaves like an open collector gate, this is what i would do--fool with the sensor on the bench to determine how it works before i let it near the HB. 1. power up the sensor, (...) (26 years ago, 24-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Print to LCD
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I certainly do! Spent a lot of effort working developing a machine code interface for the Handyboard. One of the biggest hurdles was getting messages to the LCD display. If you look on the Handyboard home page, in the contributed section: (URL) will (...) (26 years ago, 24-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Parts availability
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(...) I was able to follow the parts list and get most of the things from the suggested supplier. (...) (eqivalent?) (...) I thought that I got the memory from Jameco, but I think BG-Micro sells it was well. I would also think they both might carry (...) (26 years ago, 24-Feb-99, to lugnet.robotics.handyboard)
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| | Re: IR outputB
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Is the IR reciever on the HB the same thing as in the robot in MR:ITI book? I though it would be different. In any case, you can but...the reciever is more effective as a "wireless communication" device that can recieve various IR codes which you (...) (26 years ago, 24-Feb-99, to lugnet.robotics.handyboard)
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| | Re: IR outputB
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(...) o Hi Did anyone receive an answer to this. I ant to connect a Radio Shack (276-143) IR LED to the IR output and am wondering what resistance to use. Also, I saw a design in Mobile Robots..Inspirition where they use two IR LED (one on each (...) (26 years ago, 24-Feb-99, to lugnet.robotics.handyboard)
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