 | | NOTE 04/10/97 10:50:15
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Hi, Can someone help me understand encoders.asm? This is what I deduced from the code and I'm wondering if my guess is correct. 1. When TIC3 and TIC2 inputs are changed, an "interrupt" in execution occurs and and execution immediately jumps to the (...) (28 years ago, 10-Apr-97, to lugnet.robotics.handyboard)
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| | voltage divider
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could the voltage divider circuit shown in the Mobil Robots book (page 116 fig5.20b) be implemented as is OR does the built in pulldown resistors cause it to be modified. Thanks for all the brain dumps, victor (28 years ago, 10-Apr-97, to lugnet.robotics.handyboard)
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| | IR in programs
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How would I use an if/then statement if I used the onboard IR reciever? Earlier, I downloaded a program that Max Davies wrote to determine the different variables for my remote. In the readme file, it says that the rules are set by a command like (...) (28 years ago, 10-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Somewhat C challenged.
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Victor, The peek(0x1000) statement returns the byte at memory location 1000 (hex). In C, the '&' operator is a bitwise AND. So, what you are doing is ANDing 4 and the contents of 0x1000. What's really going on is you are interested in only bit 3 (...) (28 years ago, 10-Apr-97, to lugnet.robotics.handyboard)
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| | (no subject)
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Hello! Just 1 thing today: 1. Is there any sort of chip that can be wired up to the HB's motor ports, and then convert it to 16 (or less, maybe) outputs? phil thehahns@nconnect.net PS: does anyone know of any robot designs that will allow a robot to (...) (28 years ago, 10-Apr-97, to lugnet.robotics.handyboard)
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| | hb_ir.c
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In the hb_ir.c and the hb2_ir.icb Regaring ir_counts(4) what ports is this using. digital(?), analog(?)? What is it counting? (28 years ago, 9-Apr-97, to lugnet.robotics.handyboard)
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| | Re: sonar hookup
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If I recall correctly, I think the BINH in the sonar software is set high for the entire duration of the ping. This way, ECHO will never trigger. If you tie your BINH to GND, it will enable ONLY the internel blanking. ---...--- ericson mar Master of (...) (28 years ago, 9-Apr-97, to lugnet.robotics.handyboard)
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| | MORE IR
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I am going blind reading the archives for the solution to this problem so I will just ask. Ive got a Radio Shack tin can IR reciever plugged into digital(7). An High output IR LED w/ current limiter resistor in series (LED was getting quite warm) (...) (28 years ago, 9-Apr-97, to lugnet.robotics.handyboard)
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| | Somewhat C challenged.
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Please excuse my bitwise ignorance. Could someone explain this statement to me. if (4 & peek(0x1000)) what does peek(0x1000) return? what is the 4 for ? and what does the "&" compare? thanks victor (28 years ago, 9-Apr-97, to lugnet.robotics.handyboard)
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| | Re: sonar hookup
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Keith> Just to fill all of you in, I followed Tom's advice and it is Keith> working now. I am going to install the resistor on BINH Keith> tonight so I will get the extended range. By the way, what Keith> value resistor is best for this signal? I (...) (28 years ago, 9-Apr-97, to lugnet.robotics.handyboard)
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| | Re: sonar hookup
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(...) Remove the BINH and check the sonar readings...the minimum distance it can read will be about 16-17" (this is with an internal blanking OF 2.38millisec) this time can be modified by adding a resistor to the BINH. Also the ECHO goes into the (...) (28 years ago, 9-Apr-97, to lugnet.robotics.handyboard)
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| | Re: sonar hookup
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(...) Just to fill all of you in, I followed Tom's advice and it is working now. I am going to install the resistor on BINH tonight so I will get the extended range. By the way, what value resistor is best for this signal? I know that the suggested (...) (28 years ago, 9-Apr-97, to lugnet.robotics.handyboard)
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| | Re: sonar hookup
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K> I finally got the code loaded into my handyboard to test the unit K> but I am having some problems. When the program runs I hear K> ticking from the transducer but the reading on the LCD stays at 0" K> no matter where it points. I want to make (...) (28 years ago, 9-Apr-97, to lugnet.robotics.handyboard)
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| | sonar hookup [DAT]
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I finally got the code loaded into my handyboard to test the unit but I am having some problems. When the program runs I hear ticking from the transducer but the reading on the LCD stays at 0" no matter where it points. I want to make sure that I (...) (28 years ago, 9-Apr-97, to lugnet.robotics.handyboard)
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| | Re: running 2 IR
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If the IR LEDs both add up to a current requirement of 800ma (the spec on the ztx614) then yes you should be able to. You may want to add a resistor to supply that assures you don't get more than 800ma from supply (if that is Imax for those LEDs). (...) (28 years ago, 9-Apr-97, to lugnet.robotics.handyboard)
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| | Re: pressure sensors..
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JM, I don't have the book in front of me but Mobile Robots, From Inspiration to Implementation has some info on just this subject. If you don't have it or can't get access to it let me know and I'll do some research for ya. For example if its touch (...) (28 years ago, 9-Apr-97, to lugnet.robotics.handyboard)
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| | 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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| | 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 (...) (28 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 (...) (28 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 (...) (28 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. (...) (28 years ago, 5-Apr-97, to lugnet.robotics.handyboard)
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