Posted inMeters & Detectors
Simple Moisture Meter using 2N2222
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 [...]
Posted inSound Generator
6 Simple transistor | police | ambulance Siren (audio alarm) circuits
Today I would like to introduce the simple and economical simple siren circuits. It is suitable for beginners. My son will gradually build this circuit onto the PCB layout. Look at below! 4 Circuits.
Posted inAmplifiers
9 Burglar alarm circuits ideas
Here is five burglar alarm circuits for you can look as idea To protect their property from thieves. simple switching, vibration systems, touch-sensitive.
Posted inInverters
How to make 1.5V to 220V inverter circuit
use Mini high voltage generator at my friend wants. Because of using the transistor 2 pcs only just,build small-sized easy good. By this circuit gives pulse Generator 220V from 9V…
Posted inAmplifiers
3 Simple Metronome circuits using transistors
These circuits are Simple Metronome circuit model to be simple. It use the transistor be important equipment by very the circuit is the character Astable Multi vibrator. For produce something…