This simple moisture meter circuit uses for level moistness temple of the earth. Fine the value R2 give Meter read the value has 1mA. When the moistness
Category: Meters & Detectors
Include: Volt meters :: Sound level meter :: Analog vu meter :: Soil moisture meter :: Digital meter circuit diagram :: Temperature measurements :: Electronic measurement tools :: Frequency meters :: Best battery tester :: Transistor tester project
See more…
This is simple Solar plant watering alarm circuit. It will sound alarms when the soil is dry. The trees have died. It the solar sell is 6V DC power supply
The frequency meter by use the LC resonance circuit that adjustable until the frequency show peak amplitude.
These are Five Battery low voltage alarm indicator circuits, as ideas to make small projects, them use LED display easy, cheap with normal parts look below
This is the Transistor tester circuit into PCB. When your project do not works, the tester electronic parts or component be what need very much.
This is Bicycle distance meter circuit and main parts are reed switch detect to CD4017 then connected to Optocoupler and display to frequency counter.