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switching using power bjt

I need a fan controler

From: olivier
Date: 07 Aug 2002
Time: 22:16:51

Comments

I need a schematic that can increase or decreace the speed of multiple pc-fan in parrallel. The circuit have to be control with a thermistor. with power of 5 or 12v dc

From: jn_pandey_sify.com
Date: 15 May 2001
Time: 15:31:45

Comments

i want to design a switch used to connect and disconnect a 50 volts dc supply and a LC filter supporting some load basicaly i want to use the output of the filter to generate generate digital control signals.these signals will be used to n and off the switch.


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