Hello. Im new to electronics..
I want suggestions + schematics for a chipest simplest project:
USB power outage alarm that is triggered 10 seconds after the USB power went down.. also the alarm should make enough noise to hear from other room and should last for 10 seconds.
The basic bom:
buzzer is sfm-27
9V backup battery to drive the buzzer
usb cable
bc547 / 2n2222 transistor
capacitor
diode
resistor
optional components:
c005 timer modules
+ your suggestions..
Eventually I will send it to PCBway for my first pcb manufacturing ever.
Thanks in advance
D
I want suggestions + schematics for a chipest simplest project:
USB power outage alarm that is triggered 10 seconds after the USB power went down.. also the alarm should make enough noise to hear from other room and should last for 10 seconds.
The basic bom:
buzzer is sfm-27
9V backup battery to drive the buzzer
usb cable
bc547 / 2n2222 transistor
capacitor
diode
resistor
optional components:
c005 timer modules
+ your suggestions..
Eventually I will send it to PCBway for my first pcb manufacturing ever.
Thanks in advance
D