Everything-that-moves ALARM
#alarm
#motion detection
#security
#sensor
#alert system
#home automation
#wireless
#notification
#siren
#detector
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Building a Wireless Temperature Sensor
A wireless temperature sensor allows temperature measurements to be taken anywhere within the range of the transmitter and receiver. One straightforward approach to achieve this is by utilizing a voltage-to-frequency conversion chip in conjunction with an analog temperature sensor, such...
6W Warble-Tone Siren
This circuit utilizes a CMOS chip and a VMOS FET amplifier to achieve 6 W of audio output. With a +24 Vdc power supply, it can generate up to 18 W of audio. IC1A and IC1B function as a 1-Hz...
Security Monitor
This circuit can be utilized in a garden setting to detect unusual sounds or wildlife noises. It can also monitor sounds around a car parked in a remote location. The cable used for the setup can either be visible or...
Schematic Diagram Anti Theft Car wireless alarm
This is an anti-theft alarm with wireless connectivity, referred to as the Anti-Theft Car Wireless Alarm. The FM radio-controlled anti-theft alarm can be utilized with any vehicle that operates on a 6 to 12-volt DC supply system. The mini VHF...
Car wireless alarm
This FM radio-controlled anti-theft alarm can be used with any vehicle having a 6- to 12-volt DC supply system. The mini VHF, FM transmitter is fitted in the vehicle at night when it is parked in the car porch or...
us style siren
The circuit outlined here is capable of producing three distinct US-style siren sounds: police, ambulance, and fire engine. The sound selection is facilitated by switch S1. This circuit is applicable in various contexts, including toys (such as model vehicles), alarm...
The alarm circuit diagram for safety box and other metal objects
When an individual touches the safety box or other protected metal objects, the sensor circuit generates a pulse to the alarm circuit. The positive edge of this pulse activates the semiconductor and thyristor flash GE, subsequently triggering the camera to...
Emergency Siren circuit Simulates Police
The core component of the circuit is a dual transistor flasher with frequency modulation applied to the base of the first transistor. When the pushbutton is pressed, the oscillation frequency increases to a peak, and when the button is released,...
Open water notification Circuit Design
Boiling water on a kitchen gas stove can lead to issues such as spilling boiling water if the process is not monitored, which can extinguish the flame and cause gas leakage. A notification device can address this problem. The circuit...