This diode checker circuit can check the diode the good or bad and also can indicate its polarity. How it works In Figure 1, There are IC1, R1, R2, R3, C1 include as the oscillator circuit that generate the square wave out to pin 6. This signal will be an AC that is symmetrical waveform. […]
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This is a low noise tape head preamplifier that good sound quality. Because use LM387N that is the low noise ICs and is designed for the specific preamplifier. Figure 1 is Circuit diagram of this project. Maximum the output at 1 volts which is is high enough to drive easily the high power amplifier. The […]
If you are beginners who want to use the simple variable DC power supply 0-30V 2A. This circuit is best for you. Because it has a few parts,small,and cheapest than others circuit that same power. The features of this handset is the DC voltage continuously from 0-30 volts and apply current up to 2 amperes […]
This is a 200 watts super bridge power amplifiers, include the transistors as based of circuit, so suitable for signals from the bass guitar. It’s a high power, durable and cheap. Use it in the house, the sound quality also is good. In Figure 1 we will see that the circuit consists of two section. […]
This is an active microphone preamplifier circuit for the particular condenser microphone. Generally, the condenser microphone has high sensitivity and the high output signal more than the other types microphone, but this type need to have a power supply. How it works In Figure 1 is circuit diagram of this project. The condenser microphone M1 […]