This is simple signal injector circuit, used two transistors join together as astable multivibrator, signal output frequency 1,000Hz in square wave form.[...]
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
Today Kunal Banerjee send this project to me. It is a simple Sound detector circuit using LM324. He said ”DEAR SIR, TODAY I HAVE MADE A SOUND DETECTOR CIRCUIT, AND…
This is Diy digital voltmeter panel meter 0-50V is 0-50V scale. Display with LED 7 segment. In cost 3$ dollar only, builds simple regulator dc power supply
Simple SCR tester circuit diagram is very useful. We can know location pin on gate lead, anode lead and cathode lead. can also test diode, LED and Triac
This is Simple high water level alarm circuit diagram which we need to build it since: fish pond The water level will drop rapidly. We need to check water
The telephone line status indicator to prevent the hearing others talk on the phone accidentally and a Protection to making phone calls simultaneously. [...]
This is Stray Magnetic field meter circuit,using LED display,for low frequency range of 200-1200 Hz, for check monitor computer and high voltage cable.