Circuit Lake

Electronic Project and Circuit Collection

Alarm


Pool Alarm with Digital Voice

April 04, 2012 By: admin Category: Alarm, Microcontroller, Project, Renesas Comments Off on Pool Alarm with Digital Voice

Pool Safety Alarm

This project is a first step in trying to alleviate swimming pool or tub accidents (i.e. children drowning) by warning the occupant(s) of the house that something or someone is in the water. It foregoes old-fashioned buzzers, bells or sirens and instead uses high-quality digital audio and speech ISD2560. It is designed to be very […]

Interruption Alert System

February 02, 2012 By: admin Category: Alarm, Microcontroller, Miscellaneous, Project, Renesas No Comments →

Door Interruption Alert System for Office

This M32C/84-based office message board project allows you to display a preprogrammed message like “do not disturb”, “in the Lab”, “At Lunch” etc on the LCD positioned at the door. The project has a keypad which is placed on a desk. On this keypad there are 15 buttons and 6 LEDs for control and indicator. […]


Soil Moisture and Temperature Alarm for Gardener

December 31, 2011 By: admin Category: Alarm, Miscellaneous, Monitoring, Project, Renesas No Comments →

Soil Moisture and Temperature Indicator

SmartProbe is simple low cost moisture and temperature alarm system for plants. Insert it in the plant’s root system and it measures the moisture and temperature. It sounds an alarm if the moisture or temperature goes out of preset limits. Shut it off with a gentle tap or knock on it to ask it the […]

Gas Leakage Alarm

October 15, 2011 By: admin Category: Alarm, Detector, Sensor No Comments →

Gas Leakage Alarm Schematic

Here is a circuit that can be used to detects the leakage of LPG gas and alerts the user through audio-visual indications. The circuit uses SEN-1327 gas sensor module from RhydoLABZ. Its output goes high when the gas level reaches or exceeds certain point. A preset in the module is used to set the threshold. […]