Plant water gauge


Posted on Dec 3, 2012

To calibrate the gauge, connect the battery and press the probes gently into a pot containing a plant that is just on the verge of needing water (stick it in so that only an inch of the probe is left visible at the top). Turn the potentiometer until the `OK` LED lights and then turn it back to the point where that LED goes out and the ''W`, or ' 'Water`, LED just comes on.


Plant water gauge
Click here to download the full size of the above Circuit.

The device should now be properly adjusted.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Infrared Interruption counter
Telephone-amplifier
Tremolo
Vehicle Tracking System using GPS and GSM modem
op amp Trouble transferring schematic (working) to actual circuit (not working)
Control an Amplifier With a SqueezeBox
24v dc power supply using lm7824
Simple IR audio link
Arduino CAN Bus Interface
LOW COST SOLAR RADIO SPECTROGRAPH
Water Level Detector With Alarm
Avoid contact thermometer circuit
Touch-type FET stepless dimmer



Top