Introduction: How to Make an Amplifier From 555 Ic
You all must have seen the circuits for amps. They are very easy but sometimes if you are a noob or you can't find the things required for it you can't make it. In this instructable you will learn how to make an amplifier from 555 ic.
Step 1: About the 555
To make this amplifier you will need to know about the 555 ic's pinout. The pinout is given in this step.
Step 2: Collecting the Materials
You will need some things that are easily available to make this amplifier. The things are
1 uf capacitor
10 uf capacitor- 2
0.001 uf capacitor ( number 102)
0.1 uf capacitor ( number 104)
Bc547 transistor (you can also use 2n2222 or 2n3904)
8 ohm speaker
Electret mic (the ones in headphones)
10 to 15 volts dc power source
Step 3: Making It
Be sure to not use it for long it is for brief demonstrations only. The schematic is given in this step.
Step 4: How It Works
The 555 can be used as an amplifier. It operates very similar to pulse-width modulation. The component values cause the 555 to oscillate at approx 66kHz and the speaker does not respond to this high frequency. Instead it responds to the average CD value of the modulated output and demonstrates the concept of pulse-width modulation. The chip gets very hot and is only for brief demonstrations. The schematic and info were taken from talkingelectronics.com
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