 | | 9V batery box (6 AA) - pressed too much
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At the last robot contest, I discovered that if I press down on either side of the battery box red switch, the power stops. It is hard to put into words. If you hook up a motor to this battery box: (URL) press the red button, the motor spins. if (...) (19 years ago, 6-Oct-05, to lugnet.technic)
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| | Re: 9V batery box (6 AA) - pressed too much
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(...) Hi Chris, If you just leave the motor on without pressing the red button does it also stop? The battery boxes have a built in current limiter that will stop current flow if you are drawing too much power. Could that be the problem? Kev (19 years ago, 6-Oct-05, to lugnet.technic)
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| | Re: 9V batery box (6 AA) - pressed too much
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(...) no, this problem is more sinister, in my experiments, I only had one unloaded motor directly connected to the battery box. I do not feel using this simple set up, i overloaded the limiter. And to answer your first question YES, under normal (...) (19 years ago, 6-Oct-05, to lugnet.technic)
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| | Re: 9V batery box (6 AA) - pressed too much
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(...) The current limiter is a small disk located near the end of one of the top two batteries, and positioned vertically. Steve (19 years ago, 6-Oct-05, to lugnet.technic)
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| | Re: 9V batery box (6 AA) - pressed too much
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(...) ...and looks like this one inside the 2838 motor: (URL) (19 years ago, 7-Oct-05, to lugnet.technic)
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| | Re: 9V batery box (6 AA) - pressed too much
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(...) The battery box switch is designed so that if you press on both sides at once, nothing will happen. The switch deliberately short circuits the motor output when neither side is pressed. If you have one side clicked 'on' and gently press the (...) (19 years ago, 7-Oct-05, to lugnet.technic)
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| | Re: 9V batery box (6 AA) - pressed too much
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(...) Thanks Mark. Could you expand on : "its not designed to be used that way" I actually discovered this when I tried to replace the red button with a dual set polarity switch for these robot games: (URL) simple idea was to use a beam along one (...) (19 years ago, 7-Oct-05, to lugnet.technic)
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| | Re: 9V batery box (6 AA) - pressed too much
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(...) I wouldn't call it elegant, but it works. I used a pair of those egg shaped cams set at right angles on the same shaft, one over each battery box button. With both cams at 45 degs, neither button is pressed. With + and - 45 deg drive to the (...) (19 years ago, 7-Oct-05, to lugnet.technic)
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| | Re: 9V batery box (6 AA) - pressed too much
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(...) I've never found in necessary to do more than let them hold themselves. If I'm worried about the switch being unpressed, I'll build something over the top, to make sure they won't get hit elsewhere. Steve (19 years ago, 7-Oct-05, to lugnet.technic)
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| | Re: 9V batery box (6 AA) - pressed too much
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(...) Steve, your right, normally its not required to hold down the switch beyond what the original spec is. BUT in this case I would have thought a beam right on top would suffice. I was shocked to see the effect I noticed, and wanted to ask people (...) (19 years ago, 7-Oct-05, to lugnet.technic)
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| | Re: 9V batery box (6 AA) - pressed too much
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"Mark Bellis" <mark.bellis@tiscali.co.uk> wrote in message news:InzIxI.192w@lugnet.com... (...) <snip> (...) I think that is indeed what is hapening. If you press down (say on the right side) the motor runs, but if you keep pressing harder, watch (...) (19 years ago, 10-Oct-05, to lugnet.technic)
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