??? 03/18/06 19:32 Read: times |
#112462 - yes you are right Responding to: ???'s previous message |
Erik Malund said:
was your assignment not to find out how switches withstood inrush current?
yes. for which i need to use some inrush current limiting network to protect the reed switch if it doesnt withstand. I think resistor parallel to switch could be one option, since the disadvantage of this method as proposed by kai (large current consumption when switched sequentially) would only happen during testing in my place and since, i came to know that the customer will be using the switch in bikes for indicating some thing ( which would not be sequential) Also, for once, i just connected the lamp directly to the 12 V through the reed switch (switch is driven by a driver circuit for ON / OFF operation). i could see only the switch getting closed parmanently. 'NO SWITCHING TOOK PLACE'(note: i just saw how the switch reacts, though the low rating was pointed out in the discussion previously..) and i found the contact opens only when the switch is taken out of the coil (in which the switch would be kept to drive the lamp) and when examined the switch seems to be in good condition.. Erik said:
How is designing current limiters going to do that? I just wished to ask few explanations on that current limiter circuit that Kai had posted. Having read the description i too believe it couldnt be used for my application. but of course i could use that circuit when it happens for me to drive a lamp load in future. As an alternative to resistor parallel to switch method, any suggestions on a simpler method, with which, the inrush current flow through the reed switch could be controlled would be highly useful. thanking you, Suresh. |