 | | Re: LEGO Electro-magnet
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| Hi Philippe, (...) Hmm, I guess they are NOT protected. (...) Not sure, (I'm not an electrical-engineer please Andreas Peter, help :) ) But, when the coil has a consumption of 9mA at 9V it's 1k. (81mW) So if I undestand it right, you're in parallel (...) (23 years ago, 20-Apr-01, to lugnet.robotics)
| | | | | Re: LEGO Electro-magnet
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| To be more precise: in passive mode there is a 10K pullup (to 5V) introducing some current (0.45 mA) in the coil. This small current may be enough to retain something stuck to the magnet... Philo (...) (23 years ago, 20-Apr-01, to lugnet.robotics)
| | | | | Re: LEGO Electro-magnet
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| (...) I think this could happen. Even without this low current present all the time, an electro magnet powered by a DC supply always in the same direction can develop a residual magnetic field (samll things would stay stuck even after the electro (...) (23 years ago, 21-Apr-01, to lugnet.robotics)
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