This tutorial explains a Tone Generator Doorbell Circuit using dual IC 555 timers, also the circuit is simple and works well when we press the button One IC works in astable mode and other in monostable mode and it is very important for making sound to run a 8Ω speaker. Also, the circuit needs 9V […]
Audio Circuits
9V Battery Powered Transistor Intercom Circuit
Intercom system is device for talking at short distance; so a 9V Battery Powered Transistor Intercom Circuit uses 9V battery which is good for home or office talk. Also, it uses only transistors which is easy to understand and works well. Furthermore, the circuit has mic and small speaker as sound and a BC547 transistors […]
Designing a UJT-Based Audio Tone Generator Circuit
Designing a UJT-Based Audio Tone Generator Circuit is easy and fun and it makes music sound like small instrument, also it use UJT as relaxation oscillator. Push buttons change frequency with different notes and then sound goes to speaker after amplifier., so press button, tone change and UJT 2N2646 will make right frequency and then […]
Air Puff Controlled LED Circuit
The Air Puff Controlled LED Circuit is a fun and easy project to build and when we blow air onto the microphone, the circuit turns the LED OFF. This circuit is useful for no-touch controls, interactive devices, demonstration projects, and display applications. Main part is electret mic which hears our puff and then mic triggers […]
Canary Bird Chirp Generator Circuit
Canary Bird Chirp Generator Circuit is fun and easy circuit, it make sound like real canary bird chirping and it works like audio oscillator to copy bird sound. In addition, toys, sound gadgets and DIY projects use this circuit to generate sound effects and, also, a 9 V battery powers the circuit, making it easy […]
Jet Engine Sound Generator Circuit using IC HT2844P
Jet Engine Sound Generator Circuit using IC HT2844P is fun learning project and it makes jet engine sound using simple parts. Furthermore, it uses IC HT2844P sound chip to make real jet noise which is good for model fans, school work or DIY fun; also circuit needs 3V power and keeps under 3.3V or else circuit […]