Theremin is one very old electronic music instrument, which make strange space type sound without touching any part; when human hand move near antenna or plate then the pitch of sound changes. In addition, this happen because hand change the capacitance value near the circuit. Also, in this article we will show very small and […]
Transistor Circuits
Electromagnet Levitation Circuit with Hall Effect Sensor
Magnetic levitation is fun science project, in this Electromagnet Levitation Circuit with Hall Effect Sensor, small magnet can float in air without a touch. Also, it use electromagnet and hall sensor; then this hall sensor see magnet position and transistor gives current to coil; furthermore, this make balance of magnet force and gravity, so magnet […]
Buzzer Alert at 0°C Indicator Circuit
In winter season, water and surrounding air can go below zero degree and at that time it is useful to have a small alarm which tells us when temperature goes near freezing point. This Buzzer Alert at 0°C Indicator Circuit uses thermistor sensor, one op-amp IC and a piezo buzzer to make sound alarm when […]
Automatic Light Control Switch Circuit using IC 555
To begin with, this article is for Automatic Light Control Switch Circuit using IC 555, it works with light dependent resistor (LDR). When light falls on the LDR, its resistance changes, the 555 IC converts this resistance change into a switching signal and drives the relay; the relay can then control a lamp, fan, motor, […]
AM Radio Circuit using Transistors
This article show how make AM Radio Circuit using Transistor, as it uses easy parts like transistor, capacitor, resistor and inductor. Also, parts are easy to find and good to learn basic radio frequency RF, catch signals and to make sound louder. Circuit catch medium wave AM signals and changes AM signal to sound and […]
Headphone Amplifier Circuit using Transistors
Headphone Amplifier Circuit using Transistors make weak sound strong so headphones work well, also this circuit is useful when sound is direct from source which is not loud or clear. In addition, in this post we will talk about small 3V transistor amplifier for better sound. Circuit Working: Parts List: Components Values Quantity Resistors (All […]