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Particle clogging alarm circuit of wheat seeder
Source: InternetPublisher:zht24 Keywords: Alarm circuit photodiode light emitting diode speaker Updated: 2020/10/04
Shown is the wheat seeder particle clogging alarm circuit . In this circuit, the light-emitting diode and the photosensitive diode are set at the sowing
outlet - if there is a blockage, the light received by the photosensitive diode will be blocked , so the resistance value of VD2 will increase, causing the voltage of the NE555 ⑥ pin
to rise, and the @ pin to output an alarm signal. Make the speaker sound.
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