Frost alarm circuit
Source: InternetPublisher:武林萌主 Keywords: Alarm circuit LM324 indicator light voltage comparator Updated: 2021/06/23
Shown is the frost alarm circuit , which is
composed of a frost detection sensor (RT), a voltage comparator and an amplification and output circuit .
When frost occurs, ICI ( LM324 ) outputs a high level, causing vri and yI2 to conduct, and the alarm indicator EL lights up. At the same
time, the alarm sound is loudly raised to attract people's attention.
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