Temperature monitoring alarm equipment circuit

Published:2011/4/14 6:43:00 Author:may | Keyword: Temperature monitoring, alarm equipment | From:SeekIC

The temperature monitoring alarm equipment circuit introduced in this example has high , middle , low 3 gear temperature indication. It can send out alarm signal when the temperature is too high or too low. It can use in the occasion of big-arch shelter, greenhouse, etc which is needing temperature control. This temperature monitoring alarm equipment consists of temperature monitoring/indication circuit and voice alarm circuit. The circuit is shown in the diagram. Theoptions of components R1~R4 chooses 1/4W metal-film resistor or carbon film resistor. RP chooses compound film resistor or variable resistor. VD1~VD3 all choose 1N4148 type silicon switching diode. VL1~VL3 all choose Φ3mm LED V chooses S8550 or 3CG8850 type silicon PNP transistor. IC1 chooses ZH-3 type photometry application specific integrated circuit. HA chooses DC electric magnetic buzzer with internal alarm voice source.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Control_Circuit/Alarm_Control/Temperature_monitoring_alarm_equipment_circuit.html

Print this Page | Comments | Reading(3)