 | | Eltec 442 Pyroelectric Sensor
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Hi, I purchased an Eltec 442-3 Pyroelectric Sensor from acroname. I know pin 1 is V+ 5V but I don't know how I should connect pin 2,3,4 to my handy bord/expansion board. I want to use the sensor for detecting people and/or candles. How do I connect (...) (25 years ago, 26-Oct-99, to lugnet.robotics.handyboard)
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| | Re: fried memory
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it might not be permanently dead, but if it's not, it's not working. one (or more) of the outputs of these two chips is probably shorted to ground or shorted to +5v. the chips get hot when they try to drive this output to a state other than the one (...) (25 years ago, 26-Oct-99, to lugnet.robotics.handyboard)
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| | fried memory
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I suspect that I fried my memory chip. The handyboard downloads Pcode perfectly, but when it tries to synchronize with interactive C, I get an error. While the board is off the 62256-12LP and the 74HC132 chips stay hot. is there a good diagnostic (...) (25 years ago, 26-Oct-99, to lugnet.robotics.handyboard)
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| | Expansion Board and Smooth PWM
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I really need to know how to get all my files correct to run both the expansion board and the smooth PWM routines at the same time. I downloaded both zip files but am unsure which files to use. Did I miss something on the web page where it says how (...) (25 years ago, 26-Oct-99, to lugnet.robotics.handyboard)
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| | Re: MOTOR DRIVERS
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(...) Hi Paul, I don't know how the handyboard is protected against overload but one thing is for sure : if you overload the driver chip ... this one will fry up.In worst case you'll fry the board as well. If a driver chip's maximum current is 1 (...) (25 years ago, 25-Oct-99, to lugnet.robotics.handyboard)
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| | Re: MOTOR DRIVERS
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It won't necessarily fry the chip. L293s (and the TI equivalent) have a thermal protection mode. If the chip gets too hot, it will turn itself off. Most of the time, this protects the chip against over-current. However, it is still possible to fry (...) (25 years ago, 25-Oct-99, to lugnet.robotics.handyboard)
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| | Re: MOTOR DRIVERS
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(...) Hi Paul, I think it would take out the chip, but I am currently doing this by installing a oversize heatsink & fan to the controller chip and pulsing the motor instead of constant current. Exceeding the max current capacity but, limiting (...) (25 years ago, 25-Oct-99, to lugnet.robotics.handyboard)
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| | Re: MOTOR DRIVERS
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Answer it'll fry the chip Question? Why would you even want to do that? (...) (25 years ago, 25-Oct-99, to lugnet.robotics.handyboard)
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| | MOTOR DRIVERS
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Question? When using a motor which will exceed the driver chip max current, will that fry the chip or the handy board? Paul (25 years ago, 25-Oct-99, to lugnet.robotics.handyboard)
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| | Compiler Errors keep my board from loading
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Help!! I don't know how to fix compiler errors! Specifically, I received the following error: "Compiler error! 47 extra bytes left on board stack. " and I don't know how to fix it. I do know that I cannot load programs on my board until I fix the (...) (25 years ago, 25-Oct-99, to lugnet.robotics.handyboard)
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| | Re: What can I do with a robot?
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Adam, As far as interfacing to external devices, the inexpensive ones are wheel encoders, IR ranging, bumpers, sound sensors and visible light sensors. You can get much more involved by adding compasses, GPS, video vision and so on, but the cost (...) (25 years ago, 25-Oct-99, to lugnet.robotics.handyboard)
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| | What can I do with a robot?
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A question for all of you fantastic robotics enthusiasts out there: I have to do a final year project next year, and I'm getting a head start on designing it. I've been told that I can do pretty much what I like with a robot, as long as it has a lot (...) (25 years ago, 25-Oct-99, to lugnet.robotics.handyboard)
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| | Re: Analog port shaft encoder
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Rob, I use these same encoders just as you do, and they work fine. However, the spacing of the encoders from thier targets is important for proper function. 1.5 to 2 mm works well for me. In addition, I have had to play with the encoder high (...) (25 years ago, 25-Oct-99, to lugnet.robotics.handyboard)
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| | Re: HC11 pink book
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Adam, Here are three books for your MCU: M68HC11RM/AD is the M68HC11 Reference Manual M68HC11A8/D is the M68HC11A8 Technical Data book M68HC11A8RG/AD is the M68HC11A8 Programming Reference Guide They are available at: (URL) this helps, - Nick - (...) (25 years ago, 25-Oct-99, to lugnet.robotics.handyboard)
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| | How do I connect 100 photocells to my handyboard?
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Hi, For a project I'm working on, I need to track the output of one hundred (100) photocells. I don't need great accuracy on any of them, but maybe a ten-step resolution at the most. Is there a relatively standard or well-known method to gather (...) (25 years ago, 25-Oct-99, to lugnet.robotics.handyboard)
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| | reading sensor input?
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I've got a strange problem that probably has an easy solution, but I've been trying to hard to figure it out and am afraid that now I'm missing the obvious. I brushed the dust off my Handy Board to build a robot for my middles school robotics (...) (25 years ago, 24-Oct-99, to lugnet.robotics.handyboard)
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| | Anybody's French ?
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Hi all! As I plan to build a Handy Bord, and as I am a bit far away from USA, I just would like to know if there is anyone living in France (and maybe in/near Paris?)... Electronic components aren't really cheap here, so if I could share tips about (...) (25 years ago, 23-Oct-99, to lugnet.robotics.handyboard)
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| | Re: Analog port shaft encoder
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Tried what you said Joshua, I went through all the analog ports and manually fed them with a TTL signal from a function generator at a relatively low frequency of 5Hz and wrote this little test code to test it. In this example, the sencdr3.icb has (...) (25 years ago, 23-Oct-99, to lugnet.robotics.handyboard)
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| | Re: Analog port shaft encoder
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Rob, Another suggestion for debuging your setup would be to write a program which; 1, anually counts the pulses from the encoder, and writes them to the lcd screen; or 2, Just writes the state of the encoder input to the screen (a 1 or 0). Then you (...) (25 years ago, 23-Oct-99, to lugnet.robotics.handyboard)
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| | Analog port shaft encoder
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Hi, I am having great difficulty trying to get my shaft encoder to work using both sencdr3.icb or fencdr3.icb driver. I am using the QRB1114 optical sensor connected to analog port 3 with a current limiting resistor of 330 ohms for the emmiter and (...) (25 years ago, 22-Oct-99, to lugnet.robotics.handyboard)
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