Simple Audio Level Indicator Circuit using IC LM3915 show sound strength with lights. Its display driver is good for sound visual circuits. It takes analog voltage and can light up 10 LEDs, LCDs or other displays in line. Here LED VU meter is used. Music lovers like it because it show sound level with lights. […]
Audio Circuits
Two-Way Intercom Circuit
This simple Two-Way Intercom Circuit let two places talk to each other like old home or office system; also main parts of this circuit are: Microphone: change voice to electric signal Audio amplifier (LM386): make mic signal strong Speaker: change strong signal back to sound SPDT switch: choose talk or listen mode Battery: give power […]
IC LM386 Based Voiceover Project Circuit
IC LM386 Based Voiceover Project Circuit is small audio project, which takes mic sound and makes it louder with LM386 chip and then sends to speaker. We can also use this for public speaking, mix audio with mic first or talk in presentations, as IC LM386 chip is easy to use and uses less power […]
Amplifier Speaker Turn-On Delay Circuit
As name say this Amplifier Speaker Turn-On Delay Circuit wait few seconds before connecting speaker to amplifier. When amplifier is first turn ON then big “thump” noise can happen and this delay stop that bad sound. Circuit Working: Parts List: Components Values Quantity Resistors 33k 1/4 watt 2 1k 1/4 watt 1 Capacitors Electrolytic 100μF […]
Tone Controller Circuit using IC TL072 Op-amp
Tone Controller Circuit using IC TL072 Op-amp changes treble and bass sound, as it makes sound better and let us control treble and bass. Also, parts connect in order to cut or boost some sound frequencies. Circuit Working: Parts List: Components Values Quantity Resistors (All resistors are 1/4 watt unless specified) 1k 2 100k 2 […]
Car Stereo Amplifier Circuit
Car Stereo Amplifier Circuit with IC TDA7297 is easy to build dual channel amplifier; it works with one 12V power and gives good power to 8 ohm speaker, also with 17V it gives more power. Furthermore, its made for radios and TVs but can be use for many things, as this circuit is good for […]