Free Simple Circuit Diagram
Sometimes the output volume of amplifier is too high and hurts our ears. As well as hurting your ears, this incident could damage your loudspeaker. The circuit below can be used to protect both our ears and our loudspeakers from destructive output signal of amplifier, works by deactivating the amplifier when high level signal is detected. This circuit will disable […]
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This guitar effect circuit uses a simple high gain amplification, followed by a symmetric clipping using parallel diodes clipper. The gain of the 741 op-amp pre amplifier will be R3/(total impedance of guitar pickup + C1). With 1 kOhm guitar pickup and C1 combination impedance, the gain would be more than 1000x, this would be enough to make sure the […]
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When the source of the sound is only intermittently exist, it’s better to turn on the tape recording only when it really present. We can control a tape recorder to switch a tape recorder on when audio is present by driving an IRF511 power MOSFET and rectifying the audio input. To record intermittent transmissions such as repeater output, aircraft, etc, […]
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The following two-transistor circuit is a pre-amplifier circuit for magnetic phono cartridge, which is characterized by its frequency response defined by RIAA standard for phono recording. This pre amp circuit has gain around 40 dB (midband) at 1 kHz. Here is the schematic diagram of the circuit: [Circuit’s schematic diagram source: seekic.com]
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