current monitor and alarm circuit
#current monitor
#alarm
#sensor
#measurement
#circuit protection
#analog circuit
#alert system
#monitoring
#electronics
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Power disconnection alarm circuit diagram
The circuit operation principle of the device illustrated in Figure 13 is as follows: When the barbed wire (Fe) remains intact, the output pin (O) of the LSE is at a high state. Consequently, the transistor (VT) remains off, and...
RealView 2.0
RealView is a measurement application, which records and plots measured values from analogue hardware devices in real-time. Several curves can be plotted into a single diagram. Several diagrams can be arranged on one or more pages if necessary. Plot options...
Two HiJack Alarms
The first circuit was designed for the situation where a hijacker forces the driver from the vehicle. If a door is opened while the ignition is switched on - the circuit will trip. After a few minutes delay - when...
House Alarm Loop Circuit
This circuit features open and closed loop contacts (switches 1, 2, 3) that activate the alarm, which remains on for a duration of 5 to 10 minutes. The triggering delay for entrance and exit is set to 27 seconds. Additionally,...
ProfiLab-Expert 4.0
The ProfiLab-Expert software allows you to develop your own digital or analogue measuring technology projects. It doesn't matter if you want to create analogue measurements or digital controls - you can realize it all. And for all this you don't...
Simple Alarm Circuit Keeps Wandering Children
The receiver circuit in Figure 1 activates an audio alarm when the transmitter (Figure 2) moves beyond a specified perimeter. The transmitter functions as a voltage-controlled oscillator, operating at approximately 915 MHz within the unlicensed ISM (industrial/scientific/medical) band. It features...
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...
Add a sensor to a board and measure something with it
This week's plan is to build a device that warns of the potential for a knockdown, which is the process by which an over-canvassed ship is laid over on her beam-ends. The risk of sinking is high during this event,...
Multi Loop Parallel Alarm Circuit
This alarm features status LEDs connected to each inverter output, which indicate the status of the corresponding sensor. S8 is utilized to monitor the switches through the LEDs or to activate an alarm using Q1 and SCR1. Additionally, BZ1 should...