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: Component Type Description Quantity Resistors(All resistors are 1/4 watt unless specified) 100k 1 120k […]
Amplifier Circuits
How to Convert a Speaker into a MIC Circuit
This article for How to Convert a Speaker into a MIC Circuit shows how to turn a speaker into a microphone. It uses the speaker to catch sound. The sound turns into a weak signal. A transistor circuit makes the signal stronger. The mic wont be very clear but it is a fun way to […]
How to Make a Simple Op-Amp Circuit
Imagine two whispers one with little louder. Op-amp is smart listener. It hears only the difference and ignores background noise. It makes small difference bigger using voltage gain. This Simple Op-Amp Circuit helps boost weak signals in electronics. Circuit Working: Parts List: Category Item Quantity Resistors (All resistors are 1/4 watt unless specified) 6.8k 1 […]
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. It uses 2 small parts called transistors and 1.5V battery to make weak sound strong. It is simple mini amplifier which are good for small projects for making music sound better. Circuit Working: Parts List: Category Item Quantity Resistors (All […]
1.5V Audio Amplifier Circuit
A 1.5V Audio Amplifier Circuit is small circuit it makes sound signal more strong using only 1.5V battery. This type of circuit is low power amplifier which is good for things that uses battery or when big power is not there or not needed. Circuit Working: Parts List: Type Value Quantity Resistors (All resistors are […]
Simple LM317 Audio Amplifier Circuit
This Simple LM317 Audio Amplifier Circuit is a kind of like small trick for make speaker sound louder. LM317 chip usually is used to control voltage but here it works like small music booster amp. Not very strong amp but still help give little more sound from the music source. It can work, yes but […]