Alarm circuit which components to use?

Community Projects
1

Hi,

I need to help modify this circuit for battery box 3x 18650 (total is 11.1V)

https://www.circuitstoday.com/wire-loop-alarm

https://www.amazon.com/Sackorange-Batte … B071ZQ2X2T

[Original components for 9V]

1x condenser: 0.1 uF

1x resistor: 100K

1x resistor: 4.7M

1x MOSFET: 2N700

my buzzer is at 5-12V I would like to power it 11.1V (box 3x 18650)

can you please advise me which electronic components should i use? (I’m not sure how to calculate it) what components do i need for 11.1V?

I want the batteries to last as long as possible in idle mode.

Thanks.

2

You don’t need to modify anything, your 12 volt buzzer will work just fine at 11.1 volts.