 | | Re: colour sensor
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I would suggest that the sensors are picking up IR. I would wager that your color filters are passing the IR with little attenuation and that your sensors are peaked in the IR region and little affected by the visible color information. If you have (...) (25 years ago, 27-Jan-00, to lugnet.robotics.handyboard)
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| | Re: colour sensor
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(...) I posted to this yesterday, but my reply seems to have not appeared. What you need to have, is four sensors, not three. The fourth has no filter, and measures 'ambient' light. You then need to compare the return from this, to the other three (...) (25 years ago, 27-Jan-00, to lugnet.robotics.handyboard)
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| | HandyBoard died
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Hi all! I have some troubles with my HB. I have set it up together with the expansion board, and it worked properly and very fine. Then once, unfortunately, the LCD, connected to the expansion board, touched one of the five motor-power diodes, and (...) (25 years ago, 27-Jan-00, to lugnet.robotics.handyboard)
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| | Re: PID Control
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Bill I have code in QuickBasic and C, would this be any good to you?? It was code that I used at Uni and both versions have been tested on real apps so I know they work. For example, I developed a pneumatic cyclinder controller based on the QB (...) (25 years ago, 27-Jan-00, to lugnet.robotics.handyboard)
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| | PID Control
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Has anyone out there developed a good PID control program in IC. I didn't want to reinvent the wheel if it was already available. Thanks Bill Denzel (25 years ago, 27-Jan-00, to lugnet.robotics.handyboard)
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| | Re: colour sensor
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(...) I have typically used phototransistors rather than CDS photocells but both will work depending on the application. Sensors are like computer programs, when they do one thing they are fairly easy, if they do multiple things they are more (...) (25 years ago, 26-Jan-00, to lugnet.robotics.handyboard)
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| | Re: Ceramic resonator for mini board
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(...) I searched their site and got the SMD components only for some reason. But the part you want is in there. Try either PX800-ND or PX800MC-ND I'm not sure what the difference is. the 'MC part looks like what I've used but the Manual states that (...) (25 years ago, 26-Jan-00, to lugnet.robotics.handyboard)
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| | colour sensor
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hi chuck i tried using the photocells i got with the gleason research sensor motor kit. i used red green and blue filter, but the values are almost same (with a variation of 1 or 2). the variation is much more sensitive to the distance between the (...) (25 years ago, 26-Jan-00, to lugnet.robotics.handyboard)
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| | Ceramic resonator for mini board
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Hi all, I am having a problem with the ceramic resonator for the Miniboard and I hope someone out theer may help. In the MiniBoard part list the ceramic resonator is listed as DigiKey part # PX800. However, that is an incomplete part number that (...) (25 years ago, 26-Jan-00, to lugnet.robotics.handyboard)
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| | MIT 6.270 robot design competition, Thursday, Jan 27
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hi everyone, the mit 6.270 contest is this week. it's open to the public; you just show up. the official start time is 6 pm. that means you must get there between 4 and 5 pm, depending on how good you'd like your seats to be. typically, all the (...) (25 years ago, 26-Jan-00, to lugnet.robotics.handyboard)
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| | typos corrected in README for 6.270 SPWM routines
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Sigh...you proofread and proofread, and still you miss typos... I found and fixed some in the file ftp://junior.apk.net...0_SPWM.TXT So, if you grabbed it yesterday, grab this one again today. Sorry for the inconvenience. *Rich* (25 years ago, 25-Jan-00, to lugnet.robotics.handyboard)
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| | Re: Distance Sensors
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Hi Raj, Your range of interest is small, but see if you can get anything out of the Sharp IR sensors from Acroname ((URL) luck! (...) ______ ______ ---...--- |_ _| |_ _| Kam Leang | |______| |______ University of Utah | |_ _| |_ _| Department of (...) (25 years ago, 25-Jan-00, to lugnet.robotics.handyboard)
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| | Distance Sensors
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Hi All: Does anyone know of any good mini distance measuring sensors which can be used with a microprocessor? The required range is 0-30 mm and small size. Names of distributors would be greatly appreciated. Thank You. Raj (25 years ago, 25-Jan-00, to lugnet.robotics.handyboard)
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| | Re: Handy Board Not Responding
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It is possible to overcharge the HB only if you use the Serial Interface & Battery Charger board switched into Zap charge mode. Zap charge mode will fully charge the HB battery in three hours, after which point the battery will overheat and could (...) (25 years ago, 25-Jan-00, to lugnet.robotics.handyboard)
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| | Handy Board Not Responding
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I was using the handy board when it ran out of power. I decided to charge the board for 14 hours but I actually left it charging for 17 hours. Afterwards I tried downloading the pcode_hb.s19 into the board to make sure it would work. Unfortunately I (...) (25 years ago, 25-Jan-00, to lugnet.robotics.handyboard)
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| | lugnet.off-topic.test
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This is a test (25 years ago, 25-Jan-00, to lugnet.robotics.handyboard)
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| | Smooth PWM codefix for 6.270 boards available
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I know this is the Handy Board mailing list...but we are still using 6.270 boards in my course, and I recently finished porting Julian Skidmore's Smooth Pulse-Width Modulation (SPWM) motor routines over to the 6.270 board. This software upgrade (...) (25 years ago, 24-Jan-00, to lugnet.robotics.handyboard)
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| | Re: sonar
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The location(C7) for the .1uF that you are refering to is located on the sonar driver board, on the lower left corner of the ribbon connector. Any non-polarized cap will do just fine. (...) (25 years ago, 24-Jan-00, to lugnet.robotics.handyboard)
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| | Re: colour sensor
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An optical sensor with a filter in front of it. Standard photocell works fine. Three of them, each with a red, green, and blue filter and then sampling the three inputs can be very flexible. --Chuck (...) (25 years ago, 23-Jan-00, to lugnet.robotics.handyboard)
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| | RE:color sensor and Vision any one?
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(URL) sells a relatively cheap camera/frame grabber package named the ramcam. you access it directly and treat it like a ram chip. The color vision would proboly be easy to interface as a color sensor. And To you Handyboarders out there, would this (...) (25 years ago, 23-Jan-00, to lugnet.robotics.handyboard)
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