Tryin to implement a very simple low voltage alarm into my current project. I came across this one and all seems fine. Just having a little bit of trouble finding the correct resistor value... and making sure I have my buzzer connected correctly
I've included the original schematic and mine. I added a buzzer to the circuit and set it to go off at 3v. the original schematic chose to change the zener diode to the value you want the alarm to go off and depending on which zener diode you use to also change the resistor value. here is what I have. in the original schematic it shows using a zener diode of 3.6v the resistor should be changed to 680ohm. I've been playing around the slightly smaller resistors was wondering if anybody could tell me the exact resistance or close to what it should be. and I don't have a buzzer on hand to test with just the LED. is my buzzer connected in the right place?
My schematic :
Original Schematic:
I've included the original schematic and mine. I added a buzzer to the circuit and set it to go off at 3v. the original schematic chose to change the zener diode to the value you want the alarm to go off and depending on which zener diode you use to also change the resistor value. here is what I have. in the original schematic it shows using a zener diode of 3.6v the resistor should be changed to 680ohm. I've been playing around the slightly smaller resistors was wondering if anybody could tell me the exact resistance or close to what it should be. and I don't have a buzzer on hand to test with just the LED. is my buzzer connected in the right place?
My schematic :
Original Schematic: