 | | Re: pressure sensors... antistatic foam
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A viable option, depending on what sort of pressure is involved, is to put a thin piece of conductive (ie. antistatic) foam between two metal plates. The resistance between the plates ends up being roughly proportional to the pressure applied. It (...) (28 years ago, 9-Apr-97, to lugnet.robotics.handyboard)
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| | Re: running 2 IR
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(...) Can we not tie two IR LED's in parallel and plug into the IR port on the HB. ? (...) (28 years ago, 9-Apr-97, to lugnet.robotics.handyboard)
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| | Re: running 2 IR
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What you can do is just like the schematic for the built-in IR emitter circuit. You need to either software generate your wave or do it like the schematic. If software generated, this output would come from a output port on the HC11 to a transistor (...) (28 years ago, 9-Apr-97, to lugnet.robotics.handyboard)
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| | Re: pressure sensors..
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James, You can get Forse Sensing Resistors,and you can use strain gauages, but I find the easies thing is to make a bag or balloon of the shape you want, connect a tube to it, and use a small air pressure sensor. These are very cheap and readily (...) (28 years ago, 9-Apr-97, to lugnet.robotics.handyboard)
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| | Re: pressure sensors..
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(...) Hi James , What sort of Pressure sensor are you looking for ? air Pressure , Water ? let me Know , i work for Motorola Semiconductor we have a few avaliable let me Know via the list or return email Regards Bruce Given Montreal, Quebec, Canada (...) (28 years ago, 9-Apr-97, to lugnet.robotics.handyboard)
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| | Sony IR
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Could someone tell me what the signal from a sony remote looks like (freq, period, etc and how it is read by the sony-ir program distributed with IC) Thanks!! Tom (28 years ago, 9-Apr-97, to lugnet.robotics.handyboard)
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| | Re: ??? Last minute sanity checking for a new board
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this is basically right, read the "appendixb" document listed on the tech docs page for this kind of info....... re: hb board size, it's sized so it will fit into a commercial plastic enclosure that holds an 8 cell AA battery pack. -fred (URL) your (...) (28 years ago, 8-Apr-97, to lugnet.robotics.handyboard)
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| | Re: pressure sensors..
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Try www.infusionsystems.com. Let me know if they are able to fill the need. Thanks. ---...--- Adam B. Cox check out my web page Computer Engineer (URL) Communications Corp. vmail: 416-241-7000 (x224) ---...--- (...) (28 years ago, 8-Apr-97, to lugnet.robotics.handyboard)
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| | ??? Last minute sanity checking for a new board
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+---...---+ | NOTICE! I'm posting from a host that is not always available. If your | | email to me bounces or you want to be sure, use 'brat@naxs.com'. THNKS | +---...---+ Fred (or anybody)- I'm doing some last minute sanity-checking on a project (...) (28 years ago, 8-Apr-97, to lugnet.robotics.handyboard)
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| | pressure sensors..
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hola all, I'm working on a project where I need to use a thin pressure sensor. Does anyone have any idea where I could look to find such a sensor. -james montgomery MIT '98 (28 years ago, 8-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Redfox racer photovore
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(...) m> Hi all m> I got it in my mind to build the M.I.T. photovore that is pictured m> on page 35 of "Mobile Robots". I have been able to track down the m> October 1988 issue of Omni magazine which contains the m> article/schematic on building the (...) (28 years ago, 8-Apr-97, to lugnet.robotics.handyboard)
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| | Flame Detection
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In a past e-mail, Yoni Garbourg (sorry Yoni, I couldn't find your email address) posted a message inquiring about flame detection. Adam Cox responded about finding sensors at www.infusionsystems.com. Yoni, what did you decide to use? I have had some (...) (28 years ago, 7-Apr-97, to lugnet.robotics.handyboard)
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| | nonrobot HB applications.
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I would be interested in seeing a list of applications that the HB is being used for other than small robots. thanks vic (28 years ago, 7-Apr-97, to lugnet.robotics.handyboard)
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| | Re: running 2 IR
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You mean IR "emitters"? (IR LED) If i understand you correctly, you wish to source current with the digital outputs. The digouts are from the HC11. There can't source enough current to light IR LED's. ---...--- ericson mar Master of Engineering (...) (28 years ago, 6-Apr-97, to lugnet.robotics.handyboard)
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| | running 2 IR
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I want to be able to run 2 or 3 IR xmitters from the single output on the HB with no additional hardware. Is there any problem with hooking two or 3 IR transmitters to the ground of the IR output and running the +5v from digital outputs. Then switch (...) (28 years ago, 6-Apr-97, to lugnet.robotics.handyboard)
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| | handy board as VU meter?
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I was just thinking the other day - could a handy board be made into a VU meter? (Digital readout on the LCD, or using the motor lights, etc.) Is it fast enough? If so, how could a line level audio signal be fed into one of the analog inputs? If (...) (28 years ago, 6-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Can the handyboard be taught to talk?
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My lab partner and I are going to make our robot talk using a voice recorder/player chip from www.isd.com. They are easy to use. Don't know if this fits your purpose. jm (...) (28 years ago, 5-Apr-97, to lugnet.robotics.handyboard)
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| | Re: analog header
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Certainly the voltage follower will work. But I had a similar problem adjusting the sensitvity of a photocell that I solved by paralleling a pullup resistor of my own to get the proper impedance. You might try putting a 1 ohm (yep, thats one NOT 1k) (...) (28 years ago, 5-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Can the handyboard be taught to talk?
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(...) Actually the SP0256 and the companion Text to Speech chip supported a 'serial' mode that was much easier to use (you could use the same software uart I just posted.) Don't get your hopes up however, the speech is crude to say the least. I used (...) (28 years ago, 5-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Sonar problems
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(...) You're more than welcome. As for mounting: I have found that custom cutting stainless steel brackets with a dremel tool to be most effective. Sturdy but flexible for purposes of fine adjustment. Basically it's a long tab that slides through (...) (28 years ago, 5-Apr-97, to lugnet.robotics.handyboard)
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