Microphones detect sound, but they produce a very weak signal; then this Simple MIC Amplifier Circuit using IC LM358 make signal strong. Also, LM358 chip is cheap, easy and can work with two mic signals so people use it a lot. Audio amplifiers take weak sound signals from mic or music player and make them […]
Amplifier Circuits
Hearing Aid Circuit using 1.5V Battery
Hearing Aid Circuit using 1.5V Battery is small sound booster, which helps people with hearing loss and to hear better. Furthermore, it picks the weak sound and makes it louder in earphone, also this circuit works with one 1.5V battery. Circuit Working: Parts List: Components Values Quantity Resistors (All resistors are 1/4 watt unless specified) […]
Microphone Preamplifier Circuit using Two Transistors
Imagine our voice is a tiny whisper going into a microphone. This Microphone Preamplifier Circuit using Two Transistors works like a small megaphone; it makes the whisper louder so the main amplifier can clearly boost our voice. Circuit Working: Parts List: Components Values Quantity Resistors (All resistors are 1/4 watt unless specified) 100k 1 120k […]
Simple Speaker Audio Output Transformer Circuit
Imagine our voice is strong but we whisper through a tiny straw to reach our far friend but it wont work. Same is in circuit for Simple Speaker Audio Output Transformer Circuit which works like a megaphone for sound signal. Furthermore, it takes strong signal from amplifier and changes it to fit the speaker so […]
How to Make a Simple Op-Amp Circuit
Imagine two whispers one with little louder. Op-amp is smart listener and it hears only the difference and ignores background noise; also it makes small difference bigger using voltage gain. Hence, this Simple Op-Amp Circuit helps boost weak signals in electronics. Circuit Working: Parts List: Components Values Quantity Resistors (All resistors are 1/4 watt unless […]
Simple Two Transistors Amplifier Circuit using 1.5V Battery
This Simple Two Transistors Amplifier Circuit using 1.5V Battery works like loudspeaker for small sounds, as it uses 2 small parts called transistors and 1.5V battery to make weak sound strong. Also, it is simple mini amplifier which are good for small projects for making music sound better. Circuit Working: Parts List: Components Values Quantity […]