Audio electronic circuits list :
- Stereo Channel Selector
- Low cost intercom using transistors
- Infrared Head Phones
- Use the CD-ROM drive as a audio CD player without the computer
- Audio Visual Indicator for Telephones
- Ultrasonic pest repellent
- Sound Controlled Flip Flop
- Ultrasonic Switch
- Digital Volume Control
- 5 band graphic equalizer using a single IC/chip
- Audio Light Modulator
- Bass-treble tone control circuit
- Audio level meter (vumeter)
