 | | Re: Solar charging and OWI Arm
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Oops. I just realized I forgot to tell you how to connect the solar panel. Solar panels are almost always installed with a diode to block reverse voltage that would actually suck energy out of your battery when the sun goes down. For a small solar (...) (27 years ago, 27-Feb-00, to lugnet.robotics.handyboard)
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| | Re: Solar charging and OWI Arm
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Any 12 V solar panel would help to add some juice to the battery, but the board probably can't live on just 40mA. The recommended adapter is 500 mA, which would charge the battery about a dozen times faster. Still, I have some solar cells just (...) (27 years ago, 27-Feb-00, to lugnet.robotics.handyboard)
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| | Solar charging and OWI Arm
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Hi, Has someone builded a battery charger for the HB, using a solar panel, is a 12 v / 40 mA panel enough for that?, and how to connect it?. Also, has someone tried the OWI robotic arm ? Thank You Jose Luis (27 years ago, 26-Feb-00, to lugnet.robotics.handyboard)
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| | Re: HandyBoard A/D converter?
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This calls for a signal conditioning amplifier. Since you're not worried particularly about slew rate (the handyboard won't do much more than 12khz sample rate) you can pretty much use any op-amp you want. Ideally you'd use a single supply one, set (...) (27 years ago, 26-Feb-00, to lugnet.robotics.handyboard)
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| | Re: HandyBoard A/D converter?
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The 68HC11 has references for the range of the A/D converter. In the HB design they are hardwired to 0 and +5. I believe the pin is Vrh at (URL) and is currently wired to +5. --chris prosser From the motorola manual: 2.2.7 A/D Reference and Port E (...) (27 years ago, 26-Feb-00, to lugnet.robotics.handyboard)
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