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Subject: Re: using transistor as switching

Date: 09/17/03 at 12:22 AM
Posted by: dedrick 7
E-mail: toony_7[AT55]hotmail.com (replace [AT55] with @ to reply)
Message Posted:

In Reply to: Re: using transistor as switching posted by Russ Kincaid on 09/16/03 at 10:44 PM:

yes .the voltage to be switch on +24v and -24v and the control signal is a 555 timer logic 1 and 0. when the logic is 1 +24v is the 1st output ,-24v is another output.when the logic turn 0 .the 1st output invert to -24v and +24v to another output. i was assign to use bjt as mosfet was expensive.as long the switching time is faster than mechancial relay it ok.
thank alot


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