 | | expansion header
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Does anyone know how I might turn a selected output on the expansion header low. These outputs are normally high and reading the docs tells me this header is used for chips selection. Other than chip selection, this header could be utilized to (...) (27 years ago, 5-Apr-97, to lugnet.robotics.handyboard)
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| | analog header
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I am currently trying to put together an IR collision avoidance system..... I'm using the HOA2498-002 IR diode/transistor package which is hooked up to a darlington pair (increased sensitivity) Using a digital output to turn on the diode via a (...) (27 years ago, 5-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Sonar problems
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I remeber there being some kinda control character like a line feel or something. This is due to the difference in environments, DOS, unix, etc. This might be the cause of your problem. I think I had some trouble with this too but I forgot all about (...) (27 years ago, 5-Apr-97, to lugnet.robotics.handyboard)
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| | Better assembly code
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I went home and got my Pink book, the menemonics on this 'software output only' UART are now correct (assume PORTA bit 7 (PAI) as the output pin) ; ; Called with character to send in A ; Destroys A, B, and X ; serout:: SEI ; disable interrupts LDX (...) (28 years ago, 4-Apr-97, to lugnet.robotics.handyboard)
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| | Sonar problems
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I have The Polaroid sonar system hooked up as stated in the readme file that is on the web page but I can't get it to work. I downloaded the five programs in the sonar directory and when I try to download them I get errors. I can't get the ICB file (...) (28 years ago, 4-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Wire wrapping sockets
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(...) Sure, over 20Mhz or so. I've breadboarded 16Mhz 80286 systems on these things. Don't use the long connections (along the edge) of the board for signals. Also the chance of any given breadboard connection being flakey is about 1 in 200. So if (...) (28 years ago, 4-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Wire wrapping sockets
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(...) Check out www.cgntech.com, these guys have wire wrap sockets for the 68HC11. But they also have something _much_ cooler. They have a small board which consists of a 68HC11, RS-232 circuit, address latch, and buffer logic, with wire wrap pins (...) (28 years ago, 4-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Wire wrapping sockets
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Hi, Sorry this is on a different note. I was wondering what the advantage is of using wrie wrapping over breadboarding. Someone told me that breadboarding has alot of capacitance and will slow down the circuit at high speeds. Is this so? ---...--- (...) (28 years ago, 4-Apr-97, to lugnet.robotics.handyboard)
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| | Wire wrapping sockets
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I am thinking of building a second handyboard for myself but I want to make a few changes to the design. I need to know if anyone knows of a place to buy a 52 pin PLCC wire wrapping socket for the 68hc11. I am aware that there are adapters to (...) (28 years ago, 4-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Mini SSC - Scott Edwards
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(...) Stop the presses! You should have gotten documentation with the SSC but since you are apparently missing it (and its small anyway) the relevant information is that the Mini-SSC uses a serial interface to control its servos. You must send down (...) (28 years ago, 4-Apr-97, to lugnet.robotics.handyboard)
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| | Re: power supply
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I have never done much battery work and I was wondering if using a separate battery with a common ground to the HB has caused anyone any problems during charging or any other situation. I have common grounded a 3v battery pack to the HB supply to (...) (28 years ago, 4-Apr-97, to lugnet.robotics.handyboard)
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| | Re: photo sensor quesion.
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If you have a device that uses the handyboard supply to generate voltages then just voltage divide the output to the correct 0-5v and input on the analog ports. If you are using phototransistors or something similar there are lots of photo circuits (...) (28 years ago, 4-Apr-97, to lugnet.robotics.handyboard)
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| | Re: LCD Panel Substitute
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Any 16x2 LCD with a Hitachi HD44780 controller chip will work. I got mine from wirz electronics at www.wirz.com (go to serial lcd displays and they sell the LCD separate for $8 bucks!) There are lots of displays that use (...) (28 years ago, 4-Apr-97, to lugnet.robotics.handyboard)
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| | Mini SSC - Scott Edwards
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Hi, I am working in a group to make a six legged robot. We are using the Mini SSC from Scott Edwards to control the servo motors. We've connected the digital output #9 from the Handy Board to the S(in)#2 pin of the SSC. We also connected the signal (...) (28 years ago, 4-Apr-97, to lugnet.robotics.handyboard)
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| | Re: photo sensor quesion.
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Solar panels? ---...--- ericson mar Master of Engineering Candidate Project: Mobile Robotics mar@cooper.edu (212)353-4356 Department of Mechanical Engineering The Cooper Union for the Advancement of Science and Art ---...--- (...) (28 years ago, 3-Apr-97, to lugnet.robotics.handyboard)
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| | Re: power supply
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I've found that alkaline batteries work well. I used it to power motors too and they seem to work fine. I tested a flashlight bulb and found that it drew 0.79 A at the rated voltage. So alkaline, D-cells at least, can handle the current. ---...--- (...) (28 years ago, 3-Apr-97, to lugnet.robotics.handyboard)
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| | photo sensor quesion.
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I understand how a photoresistor that varies in restistance can be connected to the analog inputs. But what about the photelectric elements that generate voltages varying with light. (28 years ago, 3-Apr-97, to lugnet.robotics.handyboard)
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| | HB Design Question--??
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+---...---+ | NOTICE! I'm posting from a host that is not always available. If your | | email to me bounces or you want to be sure, use 'brat@naxs.com'. THNKS | +---...---+ Fred (or anybody)- I'm doing some last minute sanity-checking on a project (...) (28 years ago, 3-Apr-97, to lugnet.robotics.handyboard)
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| | power supply
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Anyone? I'm wondering if a 9V Alkaline battery could replace the battery pack in the HB. I'm merely going to use the 9V battery to power the HB and its memory. I'm not going to use any of the 5V-line supplied by the HB. In other words, all the (...) (28 years ago, 3-Apr-97, to lugnet.robotics.handyboard)
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| | Re: LCD Panel Substitute
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Are you overlooking the obvious source of LCD panels - Timeline? I only mention this because it hasn't been mentioned in the postings. Timeline is listed on the Handy Board web site, and they are about the cheapest supplier. I got a bunch of (...) (28 years ago, 3-Apr-97, to lugnet.robotics.handyboard)
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