 | | 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 (27 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 (...) (27 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 (...) (27 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 (27 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 (...) (27 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 (...) (27 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 (...) (27 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 (...) (27 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) (...) (27 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 (...) (27 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 (...) (27 years ago, 5-Apr-97, to lugnet.robotics.handyboard)
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| | Can the handyboard be taught to talk?
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Hello! REmember when I kept on asking those (yes, maybe annoying) questions about the LCD inputs and outputs? WEll, here's the reason why. On Pages 193 to 200 of the book the Robot Builder's Bonanza- 99 inexpensive robotics projects, author Gordon (...) (27 years ago, 5-Apr-97, to lugnet.robotics.handyboard)
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| | Re: analog header
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(...) This is known as an 'impedence mismatch'. Basically your NPN amplifier is incapable of driving the analog input low (which in itself seems a bit weird since you only need to sink .1 mA to do that which suggests that perhaps there is feedback (...) (27 years ago, 5-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Sonar problems
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(...) Hi all, i just tested my polaroid sonar and it works great. Thanks to Kent and Adam. BTW..with the BINH, iwas getting 1"...but when i removed it as suggested by Chuck Manis (in some old mail)...it's reading the correct distances. So i guess (...) (27 years ago, 5-Apr-97, to lugnet.robotics.handyboard)
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| | (no subject)
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Does anyone have asm (icb) code that utilizes the pinouts of the motor port 1+2 (motor drvr chip removed) to drive a stepper motor. Only 2 digital outputs would be required... one for stepping and the other for selection of direction. Thanks. (...) (27 years ago, 5-Apr-97, to lugnet.robotics.handyboard)
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| | expansion header
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Does anyone know how I might turn a selected output on the expansion header low. These outputs are normally high and reading the docs tells me this header is used for chips selection. Other than chip selection, this header could be utilized to (...) (27 years ago, 5-Apr-97, to lugnet.robotics.handyboard)
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| | analog header
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I am currently trying to put together an IR collision avoidance system..... I'm using the HOA2498-002 IR diode/transistor package which is hooked up to a darlington pair (increased sensitivity) Using a digital output to turn on the diode via a (...) (27 years ago, 5-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Sonar problems
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I remeber there being some kinda control character like a line feel or something. This is due to the difference in environments, DOS, unix, etc. This might be the cause of your problem. I think I had some trouble with this too but I forgot all about (...) (27 years ago, 5-Apr-97, to lugnet.robotics.handyboard)
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| | Better assembly code
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I went home and got my Pink book, the menemonics on this 'software output only' UART are now correct (assume PORTA bit 7 (PAI) as the output pin) ; ; Called with character to send in A ; Destroys A, B, and X ; serout:: SEI ; disable interrupts LDX (...) (28 years ago, 4-Apr-97, to lugnet.robotics.handyboard)
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| | Sonar problems
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I have The Polaroid sonar system hooked up as stated in the readme file that is on the web page but I can't get it to work. I downloaded the five programs in the sonar directory and when I try to download them I get errors. I can't get the ICB file (...) (28 years ago, 4-Apr-97, to lugnet.robotics.handyboard)
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