Circuit Schematic High Temperature fire Alarm using Transistors and IC1-UM3561

Alarm. - Here is electronic Circuit Schematic High Temperature fire Alarm using Transistors like in Figure 1 below. In this circuit schematic the basic component used are Transistors and IC1-UM3561. 

In here we will give you global description about Circuit Schematic High Temperature fire Alarm using Transistors and IC1-UM3561 and then we will give you link to continue your reading from original source as external website.

Circuit Schematic

Figure 1. Circuit Schematic High Temperature fire Alarm using Transistors and IC1-UM3561
(Source: Eleccircuit)

Component Part

1. IC1-UM3561
2. Transistor
3. Relay
4. Resistors
5. LED
6. Speaker
7. Zener Diode

Description

Circuit schematic like in Figure 1 above is Circuit Schematic High Temperature fire Alarm using Transistors and IC1-UM3561. Eleccircuit site describe that this is high temperature fire alarm circuit, when the temperature rise exceeds the limit, it will sound the siren rang out. It is easy to use with transistor circuit to detects heat. Then, a loud noise of the sirens with IC packages.

How it works

We uses the combination between Q1 (BC109), which is silicon NPN transistor and Q2 (AC188) which is PNP germanium transistor To detect heat in case of fire. Then, the siren will sound warning beeps. The collector lead of Q1 is connected with Base lead of Q2, while the collector lead of Q2 is connected with the relay-RY1.


The second section circuit include with IC1-UM3561. Which is siren generator IC or a machine gun at pin 5 and pin 6 of IC is connected to 3 volts power supply. When relay is running, pin 2 to ground. The resistor-R2 across pin 7 and pin 8 to limit the frequency of oscillator. The output will send to right of both transistors Q3 and Q4 which is connection as darlington compound to boost up signal from IC1 resistor R4, which is connected in series with Zener Diode to limit voltage to apply to IC1. The LED1 connected with resistor R1 in series and parallel with R4 . Which will light up when the sound generator working.

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