 | | Re: IR Detection
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Hi Most of the IR LED's sold at Radio Shack are the 840-880 nm wavelenght type. The Sharp tin can requires the 940 nm wavelength IR beam if my memory serves me right, it also requires to be modulated at 38 or 40 kHz depending on the model. This 38 (...) (26 years ago, 2-Nov-98, to lugnet.robotics.handyboard)
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| | as11_ic
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(...) (26 years ago, 2-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Voltage for the DC motor
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(...) Sorry, I cannot help you. My board look exactly like the one on the picture. It's a Handy Board v.1.2 I bought assembled from Glasson Research. Does somebody knows what board Phillip is using? -- Eric (26 years ago, 1-Nov-98, to lugnet.robotics.handyboard)
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| | code segment
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Hi all, I have writen a code, when i download it i received following message. "c:\ic\libs\speed.icb(1): Code and data segments collide -- overflow of 681 bytes" After that I reduced the size of code and downloaded it, It was successfull. I got (...) (26 years ago, 1-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Mailing List
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I used to work at AOL technical support, I would be very much interested if you could figure out how to use AOL as a POP3, AOL is NOT a POP3 server. AOL is very proprietery, one of the many reasons (and doesn't support DUN - dial-up networking) that (...) (26 years ago, 1-Nov-98, to lugnet.robotics.handyboard)
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| | programming help.
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hello can someone please tell me what does the following command line mean? bit_set(0x0e, 1 << (4 + motor)); i know that 0x0e refers to memory location $0E but how does bit_set work? is it similar to poke? and more importantly, what operation does (...) (26 years ago, 31-Oct-98, to lugnet.robotics.handyboard)
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| | Re: Implementation question
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Hi Ronald! Ok - my HB is working now. I got the right 1233-10 (10 means 10% of 5v - reset is going up on 4.5v). This seem to work better. Second thing is the 350ms delay seem to be necessary in normal reset. The second thing was that the power (...) (26 years ago, 31-Oct-98, to lugnet.robotics.handyboard)
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| | Re: Voltage for the DC motor
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hi, I noticed that the picture of the HB in the Web page is slight different from mine. There is no thick trace on my HB to be cut. However, the HB in the web page has a thick trace on it ? My version of the board is 1995, Fred Martin. Please help. (...) (26 years ago, 31-Oct-98, to lugnet.robotics.handyboard)
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| | Re: programming help.
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(...) In binary 1 is represented by 0000-0001 1 << 1 is 0000-0010 aka 2 1 << 2 is 0000-0100 aka 4 1 << 3 is 0000-1000 aka 8 You get the idea? x << y means slide x to the left y times. motor is probably a number between 0 and 3. 4+motor is then a (...) (26 years ago, 31-Oct-98, to lugnet.robotics.handyboard)
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| | Bend/ Flex Sensor
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Someone had inquired about Bend/ Flex sensors... There's one in the new JAMECO catalog: Flex Sensor Part No. 150551 for $10.95 (26 years ago, 30-Oct-98, to lugnet.robotics.handyboard)
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| | Re: Sonar Sensor Problems
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Thanks for doing all this testing and reporting it to us. I do really appreciate it. And I'll vote for the low tech version: use two diodes... -- Eric (...) (26 years ago, 30-Oct-98, to lugnet.robotics.handyboard)
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| | Re: Sonar Sensor Problems
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(...) The dual sonar interface board is simply a small (1.5" sq. or so) experimenter's PC board from Ripoff Shack with the six power diodes, the one resistor, and three header plugs soldered onto it. One plug goes to the HB and the other two go to (...) (26 years ago, 30-Oct-98, to lugnet.robotics.handyboard)
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| | Re: DC motor voltage source
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phillip: Pine 8 for the L293D is "Motor Power." There are two ways to get to this. 1) Pull the chip from the socket, lift the pin so it points straight up, then wire-wrap a new supply wire to this pin. Or scratch the trace leading to pin 8 U11 and (...) (26 years ago, 30-Oct-98, to lugnet.robotics.handyboard)
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| | HB Pcode v3.2 Source... (Was: Motor output)
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-----Original Message----- From: Eric Noyau <noyau@apple.com> To: William Bain <willbain@cs.umt.edu> Cc: handyboard@media.mit.edu <handyboard@media.mit.edu> Date: Thursday, October 29, 1998 8:39 PM Subject: Re: Motor output (...) <snip> (...) not (...) (26 years ago, 30-Oct-98, to lugnet.robotics.handyboard)
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| | debug help
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I just finished adding the motor output circuit to my HB. I have built and tested the interface board. I connected the interface board to the HB to download the test code to test the HB and I keep getting the "wrong port or board mode" error. Not (...) (26 years ago, 30-Oct-98, to lugnet.robotics.handyboard)
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| | Re: Other LCDs
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(...) I just did this. First you need the source code for IC, the compiler, and apparently Unix since the source code requires some pre-processing and the script to do that works under Unix (which I don't have). An alternative method requires the (...) (26 years ago, 30-Oct-98, to lugnet.robotics.handyboard)
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| | Re: IR Detection
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Transmission and reception of IR data is quite different from using IR just to bounce it off obstacles to detect their presence. To exchange data with IR you will almost certainly have to use interrupt driven assembler code which can be very (...) (26 years ago, 30-Oct-98, to lugnet.robotics.handyboard)
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| | Re: IR Detection
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(...) Hi Will: What you say might be the reason for my problem hence I bought a matched IR emitter and detector pair from Radio Shack and tried the same thing. Here again, the emitter is sending the signal but the detector is not able to see it. I (...) (26 years ago, 30-Oct-98, to lugnet.robotics.handyboard)
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| | Re: Motor output
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(...) Well, I'm cheap ;^) I'm using the free version. I might be lured into buying the commercial version: I'd sure love to have structs and multidimensional vectors. I think I will miss function pointers... Is there any source coming with the (...) (26 years ago, 30-Oct-98, to lugnet.robotics.handyboard)
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| | Re: IR Detection
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(...) The Sharp IR detector is designed to respond only to modulated IR signals. The card from Radio Shack will indicate whether the LED is illuminated, but it won't tell you whether it's modulated at the proper frequency. Perhaps that could be the (...) (26 years ago, 30-Oct-98, to lugnet.robotics.handyboard)
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