Water level buzzer
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Water Level Indicator
Water Tank Level Indicator Circuit Diagram. This is a simple two-wire remote monitoring unit featuring a three-LED level display and powered by a 9V battery.
The water tank level indicator circuit is designed to monitor the water level in a tank...
Water Level Indicator Circuit-Liquid Level Sensor Project
A simple water level indicator project with a circuit diagram for home and industry. This water tank level sensor can be utilized for any liquid level indicator projects.
The water level indicator circuit is designed to monitor and display the level...
Can I supply a 12V buzzer with 18V
Create a small buzzer for a bicycle that emits sound intermittently to deter bears. A 12V buzzer from Radio Shack (Cat. No. 273-065) is available, and there is a question regarding the feasibility of operating it directly from an 18V...
water level indicator circuit using cmos ics
A low-cost water level indicator circuit can be designed using this schematic. This water level indicator utilizes a CMOS IC, the CD4066, to indicate the amount of water present in an overhead tank and provides an alarm when the tank...
Sensor-Activated Relay Pulser Circuit
A sensor activates transistor Q1 to turn on the low-frequency 555 oscillator, which generates pulses to control LAMP II. The sensor may respond to variations in light or temperature. Either resistor RA or RB can function as the sensor, depending...
Water Level Detector With Alarm
This is a simple alarm circuit that produces a musical tone when water or any conductive liquid comes into contact with the two sensor wires provided. The circuit utilizes four transistors and one melody generator IC (M3482). When water bridges...
Power Buzzer
A powerful buzzer in the room, combined with a pushbutton at the bottom of the stairs or in the kitchen, could be very useful in such situations. The core of this circuit is formed by IC1, a TDA2030. This integrated...
Novel Buzzer
This novel buzzer circuit uses a relay in series with a small audio transformer and speaker. When the switch is pressed, the relay will operate via the transformer primary and closed relay contact. As soon as the relay operates the...
Oscillators for Buzzers and telephone Earpieces
In order to generate a single note you may try these simple circuits. With only three components you may implement some basic buzzers. You need a telephone earpiece for the first circuit. Any old telephone set has got one of...