A dual power supply is very important for audio circuits, specially for preamplifiers and operational amplifiers, as these circuits need both positive voltage and negative voltage. In many audio designs +15V and -15V power rails are commonly used, because they give clean signal amplification and low distortion. This project for 15V Dual Power Supply Circuit […]
Audio Circuits
Pre Amplifier Power Supply Circuit using IC 7818 Voltage Regulator
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 […]
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 […]