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Digital Soil Moisture Tester

Digital Soil Moisture Tester

3

6

8

IC1

LM3915

7

4

2

1

18

17

16

15

14

12

11

5

+

C1

100UF

16V

ZD1

2.7V

Zener

VR1

47K

LIN

R1

75

Ohm

TEST PROBE

R4

5.6K

R3

12K

R5

1.2K

BATT.

9V

S1

ON/OFF

Switch

LED1

R2

2.2K

LED2

LED3

LED4

LED5

LED6

LED7

LED9

LED8

Digital Soil Moisture Tester

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publish time: 2020-09-17
Circuit Everyday

This is a simple and compact digital soil moisture tester used to check whether the soil is dry or wet. It can also be used to check the dryness or humidity of cotton, wool and woven fabrics.

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