 | | Re: robot project
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(...) Michael: You will not get your program to outrun light. The rf signal is moving at 300,000,000 m/s. If you divide the space between your antennas by 300,000,000 you will get the time difference for the rf arrival time. I believe you will find (...) (25 years ago, 25-Nov-99, to lugnet.robotics.handyboard)
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| | Re: robot project
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Mike, Don't think it's going to work. 186,000 miles per second is almost 1,000,000,000 feet per second ... so if your receiver antennas are 12 inches apart the time difference of the received pulse will be 0.001 microseconds maximum ... way too (...) (25 years ago, 25-Nov-99, to lugnet.robotics.handyboard)
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| | robot project
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Hi, I’m trying to get a robot to turn a face the owner using rf. I have one transmitter (that the owner will wear) and three receivers (set up in a triangle). We want to use the transmitter as a beacon. Then whichever receiver gets the signal first, (...) (25 years ago, 25-Nov-99, to lugnet.robotics.handyboard)
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| | Re: Video Transmitters
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I received the X-10 cam I ordered two days ago. It arrived right on time, and is pretty impressive for less than $100 including California sales tax. Plus they sent me this gizmo that you plug into the back of your computer, with a couple of (...) (25 years ago, 24-Nov-99, to lugnet.robotics.handyboard)
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| | Re: IR Sensors
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(...) Didn't I post that to the handyboard list? I don't remember sending to the SRS. For some reason, I get alot of "user-not-found" error messages when I send an email to the handyboard mailing list. Do I have the old address? I was using (...) (25 years ago, 24-Nov-99, to lugnet.robotics.handyboard)
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| | IR unit
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I'm curious if there is any difficulty using the IS1U621/IS1U621L in place of the IS1U60. I notice they recommend an additional cap on the leads and I'm wondering if this is any problem? Regards, Jim Munro <jimmn@xnet.com> (25 years ago, 24-Nov-99, to lugnet.robotics.handyboard)
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| | Re: HandyBoard not responding
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Kalyan, The gray squares on the LCD simply mean that the HB doesn't have its pcode program loaded. So it doesn't indicate a hardware failure. With Window 2K, were you able to open "Direct to COM1" using HyperTerminal? If no, this definitely (...) (25 years ago, 24-Nov-99, to lugnet.robotics.handyboard)
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| | RE: HandyBoard not responding
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Hi, I tried to download the pcode under Windows 2000 , but I got the same error. So the problem is not with the COM port, must be something else. When I switch the handyboard on I see squares on the first line of the LCD. Thanks Kalyan -----Original (...) (25 years ago, 24-Nov-99, to lugnet.robotics.handyboard)
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| | Five hc374 Latch Selects for digital outs
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Hello everyone... I hav already connected a hc374 to Y0 of the expansion bus to get 8 digital outs, It works gr8. I need anouther 32 outputs which meens I need 4 more latch selects. Can I use Y1, Y2, Y3, Y4, and Y5 if needed? Y0 is used by (...) (25 years ago, 24-Nov-99, to lugnet.robotics.handyboard)
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| | Re: Flame sensors?
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Hi, We had very good luck in last years Trinity College contest with some cheap IR Photo transistors. We got some DIGI-KEY QSD422QT-ND photo transistors and found they gave us very good discrimination even at 4 feet away (which was the maximum range (...) (25 years ago, 23-Nov-99, to lugnet.robotics.handyboard)
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