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Increase dc voltage

Electric-T

Jun 4, 2017
212
Joined
Jun 4, 2017
Messages
212
I need to increase the voltage in the motion alarm circuit im working on. Im puting roughly 12vdc into the PIR sensor, but it only puts out 3.3vdc. The problem is that the voltage leaving the sensor is going to a 12v coil relay....ive explored the idea of a transistor or MOSFET. Are there any other ways that im not thinking of to increase DC voltage ?
 

kellys_eye

Jun 25, 2010
6,514
Joined
Jun 25, 2010
Messages
6,514
Use the low voltage to drive a switch that controls a higher voltage.
 

BobK

Jan 5, 2010
7,682
Joined
Jan 5, 2010
Messages
7,682
Use an NPN or N-channel MOSFET. Look in the resource section of this forum for info on using a transistor as a switch.

Bob
 
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