This is an old or “very old” schematic diagram of birdie tone or sound generator. Then, the bird sound circuit used to be a home […]
Category: Alarm
This is the collection of alarm schematic diagrams at circuitdiagram.net. The alarm provides a warning tone when an event takes place, for example: thefts, fires, and other events that are not normal. Alarms have the capability of causing a fight-or-flight response in humans; a person under this mindset will panic and either flee the perceived danger or attempt to eliminate it, often ignoring rational thought in either case. A person in such a state can be characterised as “alarmed”.
Simple Smoke Alarm using Photo Interrupter Module
This is a really simple smoke alarm circuit design. The circuit consists of two important modules that are sensor module using a photo interrupter module […]
Simple Electronic Siren Based LM358
This is a low cost, simple, yet a surprisingly powerful electronic siren powered by just a 9V battery. The circuit may provide the final circuit […]
Smart Vibration Sensor Alarm
Here the circuit design of vibration sensor alarm. Initially, when power switch S1 is flipped to “on” position, power indicator LED1 lights up immediately. IC […]
70W OCL Power Amplifier
This is the circuit diagram of 70W OCL power amplifier with output power of 70 watts single channel. It uses power transistor TIP2955 and TIP3055 […]
12 Stage Water Level Indicator
The is a simple and versatile 12 stage water level indicator circuit which will show you the current water level in the tank. This circuit […]
Light Alarm with Timer 555
Here is the simple and low cost light alarm circuit built using timer IC 555 as the sound generator and a LDR to sense the […]
Car Audio System Anti Theft Security
This is the circuit diagram of car audio system anti theft security which can be effectively used to protect and secure your expensive car audio […]
Aquarium Temperature Probe
This is the electronic circuit diagram of aquarium temperature probe capable to monitor the temperature of water and indicate the rise in temperature through audio-visual […]
Laptop / Notebook Protector
This is laptop / notebook protector circuit to protect your laptop or notebook or netbook from being stolen. Fixed in-side the laptop case, it will […]
