Tri-Tone Buzzer
₹180.00
In StockA Tri-Tone Buzzer is an audio signaling device that produces three distinct tones in a sequence or pattern. It’s commonly used in alarms, emergency systems, and attention-grabbing devices to indicate different conditions or alert levels.
Description
Unlike a standard buzzer that emits a single tone or continuous beep, a Tri-Tone Buzzer creates a sequence of three different audio frequencies, often in a repeating pattern. This makes it more noticeable and suitable for environments where different sound cues are required.
The tri-tone sound can be generated using:
- Oscillator circuits (with 555 timers)
- Microcontrollers (like Arduino or PIC)
- Audio ICs (like UM3561, HT2811)
Each tone is generated at a different frequency, typically around 500 Hz, 1 kHz, and 2 kHz, with brief delays or switches in between to make the pattern recognizable and rhythmic.
Applications:
1.Emergency Alarms
1.Used in fire alarms, hospital alerts, and evacuation systems.
2.Security Systems
1.Alerts with distinct tones for intrusion, power failure, or tampering.
3.Vehicle Warning Systems
1.Multi-tone indicators for seatbelts, doors, or engine alerts.
4.Industrial Equipment
1.Warns workers of malfunction or operational hazards.
5.Door Bells & Attention Systems
1.More noticeable than single-tone buzzers.
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₹8,790.00
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An AND gate can be built using BC547 NPN transistors, a common general-purpose transistor used in digital circuits.
The circuit represents both the inputs A & B for the AND gate and Output, Q, which also has a +5V supply to the collector of the first transistor, which is connected in series to the second transistor, and an LED is connected to the emitter terminal of the second transistor. The inputs A & B are connected to the base terminal of Transistor 1 and Transistor 2, respectively, and the output Q goes to the positive terminal LED.
₹190.00












