Liquid level detector circuit

Menci alarm produced schematic circuit diagram

The alarm circuit operates as follows: When the power switch SW1 is turned on, the alarm system becomes active. If a magnet is brought close to the spring, the magnetic field attracts the spring, causing the dynamic and static switch...

Water Level Indicator With Alarm

This circuit indicates the water level in an overhead tank and activates an alarm when the tank is full. It utilizes the commonly available CD4066 bilateral switch CMOS IC to display the water level through LEDs. When the tank is...

Enhanced Alarm

This is an enhanced version of the simple Garage/Shed Alarm. The entry and exit delays have been increased to approximately 30 seconds, and a timed siren cut-off and automatic reset have been added. The LED has been replaced with an...

Water Level Sensor Circuit

This simple water level sensor circuit monitors the presence of water in a specific location or container. The circuit activates an acoustic alarm when it detects water. The water level sensor circuit typically consists of several key components, including a water...

Water level indicator using 7-segment display circuit design

This schematic outlines a straightforward electronic project for designing a water level indicator circuit. It employs a 7-segment display to represent water levels in a tank as low, half, and full, indicated by the letters L, H, and F, respectively....

Alarm interface circuit

Alarm interface circuitry featuring a two-color light-emitting diode (LED) display. When LAi is at a high level and LBi is low, the green LED lights up; conversely, if LAi is low and LBi is high, the red LED lights up....

Liquid-level-monitor

This monitor utilizes a common 741 op-amp configured as a comparator along with a low-cost non-transistor output driver. In the absence of liquid, a voltage of approximately 2.92 V is present at the inverting input (pin 2) of the op-amp....

Single Zone Alarm

A single zone alarm circuit with entry and exit delay and other facilities. The circuit features automatic exit and entry delays, timed bell cut-off and system reset. It has provision for normally open and normally closed switches and will suit...

general purpose alarm

The alarm can be utilized for various applications, including frost monitoring and room temperature monitoring. In its quiescent state, the circuit consumes only a few microamperes, allowing a 9 V dry battery (PP3, 6AM6, MN1604, 6LR61) to potentially last up...