 | | 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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