 | | Re: How big is our community?
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it's about 500 people. fred In your message you said: (...) (26 years ago, 13-Mar-99, to lugnet.robotics.handyboard)
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| | (no subject)
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Hi, have any of you guys tried wall following with 4 ir proximity detectors? I'm having trouble getting mine to work properly. I think the problem is with my program. I'll attach it in my next letter, hope someone could help. Thanks. F. Samonte (26 years ago, 12-Mar-99, to lugnet.robotics.handyboard)
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| | Sensors
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hi i'm trying to find a cheap and reliable infra-red digital sensor with a sensing range of around 0-30cm. does anyone have any recommendations? are there any online stores that sell a wide variety of such sensors? btw, the sharp GP2D05/02 sensors (...) (26 years ago, 12-Mar-99, to lugnet.robotics.handyboard)
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| | Servo Expansion Board
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Hi all, I have the Handy Board running fairly well, although I havn't tested ports, etc. Question. I have the expansion board, and when I try to run the init_servo (not exact) command, the board locks up. Anyone see this problem before? Thank you, (...) (26 years ago, 12-Mar-99, to lugnet.robotics.handyboard)
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| | Re: Sensors
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Hi We just built a IR detection with a Radio Shack IR LED and their Sharp detector GD1U..whatever....cost a few dollars. Basically detects anything within about 60 cm, depending on what surface you are reflecting off of. We found that we had to (...) (26 years ago, 11-Mar-99, to lugnet.robotics.handyboard)
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| | RE: DC motor with encoders
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Thanks for the tip. Lotsa cool goodies. shan o (...) (26 years ago, 11-Mar-99, to lugnet.robotics.handyboard)
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| | Re: DC motor with encoders
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Hi ever heard of Maxon Motors (the one that supplied the Pathfinder on Mars with motors). They have hi quality low voltage motors. We are using them here. They have opticel encoders (HP) directly mounted. Price arouonf $120 for a 15W motor incl. (...) (26 years ago, 11-Mar-99, to lugnet.robotics.handyboard)
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| | Re: Rs422/485 to RS 232 interface
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Thanks a lot, I had only one rs232 and I used to interface a display. I'll ceck the link to search it. Stefano ---...--- (...) interface (...) (26 years ago, 11-Mar-99, to lugnet.robotics.handyboard)
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| | How big is our community?
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Hi Fred, Maybe this is a little off topic, but it's still interesting, I guess: How many people are on your HB mailing list? How big is our community? Alf (26 years ago, 11-Mar-99, to lugnet.robotics.handyboard)
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| | Re: Creating multiple serial outputs with the HB expansion board
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I have considered something like that and it sure would work but I was hoping to find a s/w based solution that didn't require changing the h/w. I only need outputs, 2400bps, and I dont need any of the more functional aspects of typical serial parts (...) (26 years ago, 11-Mar-99, to lugnet.robotics.handyboard)
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| | Re: DC motor with encoders
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You can get all type of motors from Surplus Center their number is 800-488-3407. -----Original Message----- From: CHOI DAMEE <choi5@cooper.edu> To: handyboard@media.mit.edu <handyboard@media.mit.edu> Date: Wednesday, March 10, 1999 9:34 PM Subject: (...) (26 years ago, 11-Mar-99, to lugnet.robotics.handyboard)
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| | Re: Creating multiple serial outputs with the HB expansion board
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Have you considered (not sure about the full requirements) but designing a secondary expansion board with serial controllers instead of the expansion headers?? Just an idea, but the Motorola version of the serial processor (6850?) should be a good (...) (26 years ago, 11-Mar-99, to lugnet.robotics.handyboard)
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| | Re: Rs422/485 to RS 232 interface
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(...) We buy them from B&B. However, my link isn't up right now and I can't check the URL. Try www.bandb.com. I know that www.obdii.com links to their site. -d I use Unix because reboots are for hardware upgrades... You use Windows because some (...) (26 years ago, 11-Mar-99, to lugnet.robotics.handyboard)
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| | Creating multiple serial outputs with the HB expansion board
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I would like to create multiple serial outputs (like 3 or 4) using the digital outputs on the handyboard expansion board. The purpose is to drive an external servo controller and external motor controllers (motorminds) which can handle more load (...) (26 years ago, 11-Mar-99, to lugnet.robotics.handyboard)
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| | DC motor with encoders
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Does anyone know where we can find DC motors with optical encoders? possible low voltage ones (around 12 volts...) Thank you for any information :) (26 years ago, 11-Mar-99, to lugnet.robotics.handyboard)
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| | pointers to functions
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is it possible (with some trick) to pass a pointer to a function in interactive C? more specifically, on the free version of interactive c? i have tried, but it always gets me the error that i am tring to use a <function> in an expression. (in (...) (26 years ago, 10-Mar-99, to lugnet.robotics.handyboard)
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| | Re: Vision on the Handy Board?
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I would like to also know about this. Please email me if you have info! thanx =) chen (...) (26 years ago, 10-Mar-99, to lugnet.robotics.handyboard)
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| | Re: Off the subject question...
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Ja, a laptop would work. Even better, cheaper, why not use a good old desktop coputer? Then you could just have the components you need, IE a motherboard, a removeable video card, sound card, the amount of memory you like, etc. Best of all, the (...) (26 years ago, 10-Mar-99, to lugnet.robotics.handyboard)
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| | RE: Memory peripheral device
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(...) Sure it can, provided: -you can get the voltage output to be in a respectable range for the HDD (solved by changing battery power to output chips) -you can write a driver using the necessary digital inputs/outputs as necessary (hard but (...) (26 years ago, 10-Mar-99, to lugnet.robotics.handyboard)
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| | Re: unknown HB messages
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I had the same problem. I tried everything, even replacing the CMOS memory chip, to no avail. Since my board was purchased assembled from Gleason, I ultimately swapped them for a replacement which has been working perfectly. I don't know whether (...) (26 years ago, 10-Mar-99, to lugnet.robotics.handyboard)
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