Like our previous post on dual power supply, here we learn more about a 15V dual power supply circuit for a preamplifier; many electronic circuits need dual voltage supply, for example: operational amplifier circuits, audio circuits and other analog circuits. These circuits need both positive and negative voltage that is +15V and −15V; so, this […]
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 and if supply voltage is not stable then hum and distortion may appear in audio output. Therefore, a regulated power supply 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 i selected the frequency using manual switches; however, this circuit replaces manual switching with electronic switching by using the CD4066B quad bilateral switch, which the 555 timer controls automatically. The CD4066 is a quad bilateral switch IC that contains four independent analog switches […]
Audio Controlled Mini AC Lamp Flasher Circuit using SCR
This article explains a simple and low cost Audio Controlled Mini AC Lamp Flasher Circuit using an SCR. The circuit responds to an audio signal by flashing the lamp in sync with the music; as the sound level increases, the lamp glows brighter. So it follows the audio level, for this the circuit uses SCR […]
Simple Drummer Sound Circuit using IC 555
Today electronic sound circuits are very popular among the young generation; hence, one such circuit which will benefit the beginners in electronic is a Simple Drummer Sound Circuit using IC 555. This circuit uses the IC 555 timer, which offers a low-cost, readily available solution for sound and timing projects, also its simple design makes […]
Simple Two Transistor Buzzer Circuit
A buzzer is a small sound-producing device that designers use in alarms, toys, and indicators; also this Simple Two Transistor Buzzer Circuit uses only two transistors, making it simple to build and ideal for beginners. Furthermore, it works with low voltage and because of this it is safe to test, so let us understand the […]