In many audio circuits, clean power supply is very important, especially pre-amplifier circuits need stable and noise free voltage. If supply voltage is not stable then hum and distortion may appear in audio output. Therefore, a regulated power supply is used in this post, as this circuit uses transformer, bridge rectifier, filter capacitors and 7818 […]
Audio Circuits
CD4066 Analog Switch with 555 Timer Circuit
In my previous article for Switch Selectable Four Frequency Pulse Generator Circuit frequency selection was done using manual switches. However, in this circuit the manual switching method is replaced with electronic switching using the CD4066B quad bilateral switch which is controlled by a 555 timer for automatic operation. CD4066 is a quad bilateral switch IC […]
Audio Controlled Mini AC Lamp Flasher Circuit using SCR
This article is about a simple and low cost project, which we call it is an Audio Controlled Mini AC Lamp Flasher circuit using an SCR. It works with audio signal, when music comes the lamp flashes and when sound increases the lamp glows more. So it follows the audio level for this the circuit […]
Simple Drummer Sound Circuit using IC 555
Today electronic sound circuits are very popular among the young generation. One such circuit which will benefit the beginners in electronic is a Simple Drummer Sound Circuit using IC 555. This circuit is made using IC 555 timer which is very cheap and easily available. It is widely used for sound and timing projects, so […]
Simple Two Transistor Buzzer Circuit
A buzzer is a small sound making device that is used in alarms, toys, and indicators. This Simple Two Transistor Buzzer Circuit is very simple and easy to make. It uses only two transistors and therefore, it is good for beginners. Also, it works with low voltage and because of this it is safe to […]
Bluetooth Controlled Police Siren Sound Circuit with Arduino
Nowadays, Arduino projects are very popular and they controls everything. They are easy to build and they are useful for learning electronics. This project is about Bluetooth Controlled Police Siren Sound Circuit with Arduino. Arduino UNO is the main controller and Bluetooth module is used for wireless control. With Bluetooth we can control lights and […]