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Mechanical free energy devices => mechanic => Topic started by: mcorrade on February 22, 2008, 04:23:07 PM

Title: reed switch and transistor?
Post by: mcorrade on February 22, 2008, 04:23:07 PM
Can someone point me to where I could find out how to wire up a transistor to my pulse motor so my reed switch won't burn out....

thanks a million
Title: Re: reed switch and transistor?
Post by: gyulasun on February 22, 2008, 07:34:13 PM
You can see the principle here:  http://www.simplemotor.com/tmotor.htm

to reduce base current it is advised to connect a 4.7 kOhm to 10 kOhm resistor in series with the reed switch.

coil here is in the emitter,  you may place it in the collector too.

be sure to use a transistor with correct current/voltage ratings for your task,  thinking of back EMF voltage pulse too.

Gyula