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Introduction to the frost alarm circuit diagram

2016-02-21 10:46  
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This article is the summary of the frost alarm circuit diagram. Do you have any idea on the circuit and opinions, welcome to contact us. At the same time also hope that this article is helpful to you. Use the resistance of the thermistor has 15 k in 25 degrees and 45 k at 0 degrees Celsius. A suitable bead thermistors are Maplin found in the directory. 100 k pot allows the trigger circuit in a wide range of temperatures. A slight amount of lag is by the inclusion of the 270 k resistor. This prevents relay status when the temperature close to the switch threshold circuit. Do you think you could understand the circuit there are several important components: UA741 , 1 n4002, BC109. 

Alarm

 


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