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 | | Battery question
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| Hello all, I currently have a 12v 2amp camcorder gel-cell as a motor power source for some 12-24v gearhead motors purchased from Acroname. I am using stacked L239's and TI motor driver chips to interface. All is working, except that the motors only (...) (25 years ago, 10-May-99, to lugnet.robotics.handyboard)
| | | | | RE: SHARP new product
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| Steve Richards of Acroname says he will be carrying both the GP02D12 and GP02D15 within the next few weeks...<smack!> -Drew -----Original Message----- From: Bill Denzel [mailto:wdenzel@poly...lpoly.edu] Sent: Monday, May 10, 1999 2:35 PM To: (...) (25 years ago, 10-May-99, to lugnet.robotics.handyboard)
| | | | | Re: Sharp 2L01
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| Scott Sherman wrote: <snip> (...) Scott: The Hamamatsu P5587 photoreflector is great for use as a shaft encoder. It's available from Zagros Robotics at: (URL) - - - Nick - - - (25 years ago, 10-May-99, to lugnet.robotics.handyboard)
| | | | | RE: SHARP new product
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| It seems the advantage is you don't have to worry about the control line, the gp2d12 does it all, alleviating the need for the interrupt routines... -Drew -----Original Message----- From: shsc9801@condor.stcl...dstate.edu (...) (25 years ago, 10-May-99, to lugnet.robotics.handyboard)
| | | | | Sharp 2L01
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| Hello, I am considering what circutry to use for shaft encoders and one of them was the Sharp 2L01 because of its casing (mounting position mainly). However, I am having trouble trying to find it or anything close to it for that matter. Does anyone (...) (25 years ago, 10-May-99, to lugnet.robotics.handyboard)
| | | | | Re: SHARP new product
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| I was looking at that this weekend. I am presently using 4 gp2d02's and am about to order 2 more. the distance on these gp2d12's is no different and I think one might have more control over the gp2d02 since you control the digital output to it (...) (25 years ago, 10-May-99, to lugnet.robotics.handyboard)
| | | | | Re: charger
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| the main reason this doesn't work is the 1a supply produces too high a voltage at the actual current being drawn, resulting too high a charge rate. technically, it will work in NORMAL charge mode, but you'll be charging the battery too fast, (...) (25 years ago, 10-May-99, to lugnet.robotics.handyboard)
| | | | | Re: charger
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| Hi all: The problem with using a wall wart that is NOT 12 V @ 500 mA is this: most wall warts are _not_ regulated, and they have a fairly high internal impedance. If there is no load on a "12 V" unit, the output voltage will likely be at least 18 V, (...) (25 years ago, 10-May-99, to lugnet.robotics.handyboard)
| | | | | Measuring motors current
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| Hi, I'm using for my base 12 v geared motors ,without load, each one drives less than 100 mA, but when stalled, the current grow to 500 mA, wich is to close to the 600 mA of L293 chips, i do not need more current, but i want to protect the L293 from (...) (25 years ago, 10-May-99, to lugnet.robotics.handyboard)
| | | | | Re: charger
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| (...) I'm relying on non-handyboard experience here, but I'm going to assume that's too much. One amp is a heavy load, and although there's a 5v regulator on the circuit, I'd guess that it's not rated for 1 amp (it may just run hot) and might not be (...) (25 years ago, 10-May-99, to lugnet.robotics.handyboard)
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