The IC 741 Based Audible Light Sensor Circuit using LDR is a simple and useful electronic circuit which detects the change in light intensity and gives an audible sound through the speaker. Also, this circuit works like a light controlled pulse oscillator generator, as IC 741 gives pulse signals at the output and the speaker […]
Audio Circuits
Automatic Tone Generator Circuit using LDR and 555 IC
Want to build a smart sound circuit controlled by light? then this simple yet interesting electronics project is a perfect choice, which uses an LDR and 555 timer IC to generate different tone or beep sounds whenever the light level changes, making it best for alarms, warning systems and beginner electronics projects. The 555 timer […]
LM386 Amplifier Circuit with Bass Boost and Mini Audio Amplifier
This project uses a very old LM386 audio amplifier IC and is still one of the best beginner audio amplifier ICs for learning and DIY circuits, which increases the strength of weak audio signals with very few components, it provides enough output power to drive a small 4Ω or 8Ω speaker directly and because of […]
15V Dual Power Supply Circuit for Preamplifier
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 […]
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 […]