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STD Water Alarm Clock
Water Alarm Clock
License
Public Domain
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Update time：
2023-10-23 19:55:57
Creation time：
2021-12-07 15:43:38
Description
Description
# Description
This tiny PCB is conformed by 3 stages, power supply stage, control stage and alarm stage.
## Power supply
The Power Supply stage has a three coin batery powering all the circuit and a 3.3v integrate control source MS1117.
## Control stage
The control stage is made by 8bit PIC ATtinny that is the responsible for timerize, send the Buzzer PWM signal and detects the state of the ON/OFF switch.
## Alarm/sound stage
Alarm stage is made by a buzzer and single BJT transistor to adapt the PWM signal.
Design Drawing
Design Drawing
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