Electronics is very interesting and amplifier circuits are very useful, as one of the basic amplifiers is the common emitter amplifier. This circuit uses an NPN transistor to amplify a small input signal into a larger output signal; therefore, designers use this circuit in sensors, audio circuits and switching applications. In short this article explains […]
DIY Projects
Square and Triangle Wave Generator Circuit
This Square and Triangle Wave Generator Circuit is a simple waveform generator, which gives two outputs at same time with one output is square wave and another output is triangle wave. Also, the circuit uses only one IC which uses few resistors and capacitors, so the cost is low and the circuit is easy to […]
PIR Sensor Motion Alarm Circuit Transistor and Relay
Nowadays, security is very important that why homes and shops need protection; so to safeguard this motion sensor circuits are useful. The PIR Sensor Motion Alarm Circuit with Transistor and Relay is simple because it uses only a few components, costs very little, and is easy to build. The circuit works using a PIR sensor […]
9V Loud Speaker Sound Generator Circuit
This article explains a 9V Loud Speaker Sound Generator Circuit that is simple, low-cost, and operates from a 9V DC power supply. In addition, the circuit gives loud sound compared to simple buzzer, therefore it is useful for alarms, door bells, alerts and projects and also, the circuit uses common transistors, so beginners can build […]
Simple Transistor Oscillator Speaker Circuit
Many people think a buzzer is necessary to produce sound, but this circuit proves otherwise by generating sound with only a few components. This Simple Transistor Oscillator Speaker Circuit does not use a buzzer, instead, the transistors drive a small speaker directly, allowing the circuit to generate sound on its own. Moreover, it is very […]
Toy Organ Circuit using Transistors
This Toy Organ Circuit using Transistors show how electronic circuits can produce music with only a few components; also the circuit uses just two transistors and a few simple parts, so it requires no IC, no coding, and no complex components. When we press different push buttons, the circuit produces different sound tones, so it […]