 | | VECTOR 2X
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Hi all, I am currently fabricating my new HBoard based robot and have only gotten to the design stages. I have ordered a Vector 2x but haven't recieved it yet. I am not particularly well endowed with electronics or assembly language skills (very (...) (24 years ago, 3-Jul-00, to lugnet.robotics.handyboard)
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| | HB Batteries
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I am going to use individual AA cell batteries to power the HB mounted into two 4 cell holders. My question is this, if I use NiMh cells (1300mAh) rather than NiCd cells (800 - 900 mAh) how would this effect the HB ?. My current understanding is (...) (24 years ago, 3-Jul-00, to lugnet.robotics.handyboard)
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| | 6.8nF Capacitor
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I have found that Maplins have only stopped stocking the 5% tolerance caps, they still do 10% versions. How critical is the capacitors value ?. I could probably try testing a batch of them in the shop using a multimeter but I couldn't guarentee how (...) (24 years ago, 3-Jul-00, to lugnet.robotics.handyboard)
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| | 6.8nF Capacitor
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I have got all the parts for building my HB except for a 6.8 nF 2% capacitor (component C6). Maplin Electronics have stop doing it and I am not sure where to try next. I am in the UK, does any body know if I can change the resistors in the infrared (...) (24 years ago, 3-Jul-00, to lugnet.robotics.handyboard)
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| | Re: Sharp GP2D12-Sensor under sunlight?
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I have three GP2D12s running on a Handyboard and they seem to run quite well in sunlight. In overcast or indirect light (shade) their performance seems identical to indoor light. In bright sunlight there seems to be a possible shortening of the (...) (24 years ago, 1-Jul-00, to lugnet.robotics.handyboard)
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| | Sharp GP2D12-Sensor under sunlight?
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Hi, I am working on a robot with the HandyBoard. I am thinking about using the Sharp GP2D12-Sensor because the other IR reflective sensors I use won't work under sunlight. I read the spec. sheet of GP2D02 and GP2D05, both of them mention that they (...) (24 years ago, 1-Jul-00, to lugnet.robotics.handyboard)
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| | RE: Motors spinning at startup
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I also tried all sorts of capacitors, etc. in an attempt at solving this problem. While the capacitors helped to minimize the length of time before the motors calmed down, there was always a short period of motor craziness that never went away. I (...) (24 years ago, 30-Jun-00, to lugnet.robotics.handyboard)
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| | Re: Motors spinning at startup
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I have been having the same motors spinning on powerup "problem" with my Handyboard. I tried various capacitor combinations on my modified servo motors to no effect. Fred M. finally provided the answer: (...) In short, there is nothing wrong with (...) (24 years ago, 30-Jun-00, to lugnet.robotics.handyboard)
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| | Re: sonar and overflow
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Hi I think that the longest distance your able to measure is about 2.7m. The counter is 16 bit long and has no sign. But the integer is has a sign, so you can only use 15 bits, which is 32768. The counter increases each 0.5ns (pink book). Sound (...) (24 years ago, 30-Jun-00, to lugnet.robotics.handyboard)
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| | sonar and overflow
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Greetings all, Has anyone managed to work out some code which checks the overflow bit for the counter used in the polaroid sonar code? At the moment mine distance readings seem to be maxing out around 1.5m or so, and I'm not sure if it's the timer (...) (24 years ago, 30-Jun-00, to lugnet.robotics.handyboard)
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