Simple solar plant watering alarm
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
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September 9, 2017
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
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VHF Dip Meter circuit
The frequency meter by use the LC resonance circuit that adjustable until the frequency show peak amplitude.
July 23, 2017
Simple 555 IC Tester Circuit Diagram
Normal multimeter cannot check it. This circuit can help you.
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Five Battery low voltage alarm indicator circuits
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 [...]
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4 simple transistor tester circuits
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.
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Bicycle distance meter circuit using 4N26,CD4017
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Simple LED music light circuit
This is a simple LED music light circuit. Music can change the LED light level gamut. Operation of this circuit is a circuit OP-AMP IC1-LM318-Single High-Speed Operational Amplifier / 1-IC1…
May 19, 2017