SEN0193 from DFRobot

168

03:57:08

Trying to see how a DFRobot capacitive soil moisture sensor works.

http://www.dfrobot.com/wiki/index.php?title=Capacitive_Soil_Moisture_Sensor_SKU:SEN0193

The logic gates allow NE555 to look like a TLC555 (which is CMOS rather than BJT's) 

Use push button to get peak detector near its stable output voltage.

The 100pF is for adding soil moisture which changes the capacitance of the sensor. 100pF is more than what the sensor will change when put in a swimming pool but it does show the analog output changes some.

published 9 years ago

add comment in editor

EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic visualization make it a must have application for professionals and academia. EveryCircuit user community has collaboratively created the largest searchable library of circuit designs. EveryCircuit app runs online in popular browsers and on mobile phones and tablets, enabling you to capture design ideas and learn electronics on the go.