Soil Moisture Controller Module Board Kit Automatic Watering Device Automatic Watering DIY Electronic Production Parts Diy Kit

Soil Moisture Controller Module Board Kit Automatic Watering Device Automatic Watering DIY Electronic Production Parts Diy Kit

product manual:

The soil moisture controller detects soil moisture through the soil moisture sensor (fork-shaped circuit board). The soil moisture sensor is non-conducting in the air. After inserting the soil, the more moisture in the soil, the resistance on the two wiring terminals of the moisture sensor The lower the value, the higher the resistance. The signal of the sensor is connected to the control circuit through the J2 probe interface.

The resistance R2 is connected in series with the humidity probe, and the humidity change will be reflected as the change of the voltage at the reverse input terminal of the voltage comparator U1A. If it is lower than the voltage at the same direction input terminal of U1A, the comparator will output a high level, otherwise the output will be low. The capacitor C2 is a stable output signal to prevent the relay frequency action when the humidity is detected in a critical state.

The self-locking switch J3 is used to control the action mode of the relay (whether to output a high-level pull-in relay at the first pin of U1A, or output a low-level pull-in relay at the first pin of U1A) pay attention to the direction when installing the self-locking switch, The self-locking switch has a protruding short vertical line on the side. This mark should be the same as the short line of the mounting position on the .

Adjustable resistor R3 is used to adjust the humidity control value. The relay output terminal J4 can be used as an electrical switch for some high-power electrical appliances, such as water pumps, sprays and other machinery. So as to realize automatic control. The light-emitting diode D1 is the power supply indicator of the control board, and D2 is the relay pull-in action indicator.

Working voltage: 5V DC voltage

Load: 250V 10A AC or 30V 10A DC (currents below this range can be used)

About shping
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