 | | Re: Handboard exp.
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Hi, I believe an earlier post indicated that, since the analog inputs on the expansion board are multiplexed to the analog input 0 on the HB, if you cut the trace on analog port 0, the expansion board analog ports will all be "pull-up (...) (24 years ago, 20-Jul-00, to lugnet.robotics.handyboard)
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| | GP2D12 on expansion board
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Hi all, I am using three GP2D12 on the expansion board. When I connect them (after removing the analogue port 1 resistor and put the GP2D12 on port 24-26) I experience some weird problem. It seems the there is a short-circuit somewhere. I notice (...) (24 years ago, 19-Jul-00, to lugnet.robotics.handyboard)
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| | short-circuit?
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Hi, This past few days, I notice my board uses up the battery very quickly (may be because I use servos). Then I notice that the voltage regulator at U13 heats up very quickly. I was wondering if I short-circuit somewhere. I didn't build the board, (...) (24 years ago, 19-Jul-00, to lugnet.robotics.handyboard)
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| | Re: What is a bobbin(sp)?
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(...) is it a cylinder (about the size of 2x2) with thin wall sides? (what a lego description!) then, it is an accessory for a sewing machine that holds the thread for the backstitch. older ones are metal; newer ones are plastic. later ~ craig~ (24 years ago, 19-Jul-00, to lugnet.robotics.handyboard)
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| | Re: What is a bobbin(sp)?
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Isn't a bobbin part of a sewing machine? I distinctly remember it being the thing underneath the needle that you needed to load with thread to make the whole thing work. Aha, a look at websters gives me the following definition: 5. (Elec.) A (...) (24 years ago, 19-Jul-00, to lugnet.robotics.handyboard)
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| | RP: GP2D12 on port 28, 29, 30
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Hi. Sorry if this is a repost. I don't think I was able to post this message last time. I am thinking about putting three GP2D12 sensors on port 28, 29, 30 (because I am not thinking about using Lego Sensor, and I really like other analogue ports (...) (24 years ago, 18-Jul-00, to lugnet.robotics.handyboard)
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| | RP: What is a bobbin(sp)?
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Hi. Sorry if this is a repost. I don't think I was able to post this message last time. This is a silly question: What is a bobbin(sp)? I tried to find its function on-line or in textbooks, but I couldn't find much. A friend gave me a box filled (...) (24 years ago, 18-Jul-00, to lugnet.robotics.handyboard)
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| | RP: GP2D12 on port 28, 29, 30
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Hi. Sorry if this is a repost. I don't think I was able to post this message last time. I am thinking about putting three GP2D12 sensors on port 28, 29, 30 (because I am not thinking about using Lego Sensor, and I really like other analogue ports (...) (24 years ago, 18-Jul-00, to lugnet.robotics.handyboard)
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| | 470uF Capacitor (C3)
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Just a quick question, how important to the poser supply of the HB is the 470uF axial electrolytic capacitor ?. I made the mistake of getting a 64V version thinking that this would be ok and as it is installed under the LCD the rather large cap that (...) (24 years ago, 18-Jul-00, to lugnet.robotics.handyboard)
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| | GP2D12 on port 28, 29, 30
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Hi, I am thinking about putting three GP2D12 sensors on port 28, 29, 30 (because I am not thinking about using Lego Sensor, and I really like other analogue ports with the 1K pull-up resistors). Has anyone done it? Or is it a bad idea to uses these (...) (24 years ago, 17-Jul-00, to lugnet.robotics.handyboard)
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| | Cabling concerns
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I am putting together a somewhat modular robot: The main controller and batteries are to be connected to peripheral motors (and controller) via cable-- around 5 feet distance. I'm looking for a connection cable that has enough pins for my data and (...) (24 years ago, 17-Jul-00, to lugnet.robotics.handyboard)
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| | What is a bobbin(sp)?
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This is a silly question: What is a bobbin(sp)? I tried to find its function on-line or in textbooks, but I couldn't find much. A friend gave me a box filled with robot parts, including these things call bobbin. What are they? -- Ray (24 years ago, 17-Jul-00, to lugnet.robotics.handyboard)
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| | PWM decoding
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Has any body used the HB to decode the PWM signals from a radio control receiver ?. I'm not sure if it can be done (I haven't looked that deeply into it yet) but I am construction a six legged walker with the twelve servos being controlled by a (...) (24 years ago, 17-Jul-00, to lugnet.robotics.handyboard)
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| | IR Sensor Hack
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I wrote the following email to Mekatronix regarding the sensor hack to convert Sharp GP1U58X or Y sensors to IR range finder sensors. The pdf documentation currently on their website just shows how to solder onto a trace within the sensor to give an (...) (24 years ago, 17-Jul-00, to lugnet.robotics.handyboard)
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| | Handboard exp.
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Hi I have a small problem, I want to connect three sharp gp2d12s to the expansion board and I know I cant cut traces 0,1 and the gp2d12s need the pullups removed to operate correctly. How do I use them on the expansion board? Any help would be (...) (24 years ago, 17-Jul-00, to lugnet.robotics.handyboard)
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| | Re: HB power drain
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My board draws .068 amps when idle. MLB (...) (24 years ago, 15-Jul-00, to lugnet.robotics.handyboard)
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| | Re: IR (formally 6.8nF cap)
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yes, a variance of 1 kHz in the carrier frequency makes no difference at all to these sensors. f. In your message you said: (...) (24 years ago, 14-Jul-00, to lugnet.robotics.handyboard)
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| | HB power drain
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Does anybody know what sort of power drain the HB has when it is not driving any outputs (servos or motors) ?. The reason I ask is that I am thinking of having a rechargable 9v PP3 battery connected as a reserve battery so that when the main battery (...) (24 years ago, 14-Jul-00, to lugnet.robotics.handyboard)
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| | Re: IR (formally 6.8nF cap)
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So as the 39KHz value would be ok for either the IS1U60 (38KHz) or the hacked sensors (40KHz), will my idea for the hacked IR sensor distance measurement using the IR output circuitry to drive multiple LEDs also be valid ?. Thanks for the help. John (...) (24 years ago, 14-Jul-00, to lugnet.robotics.handyboard)
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| | Pins to connect for stacking h bridges
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Hello all, I have built a robot before, and sold it, and had stacked H-Bridge chips. I had also fed in an alternate battery source. I want to do this again and can't remember which pin to use for pos battery terminal (pin # please). I am not an (...) (24 years ago, 13-Jul-00, to lugnet.robotics.handyboard)
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