Free Simple Circuit Diagram
The output of this circuit will be activated when a mix of two tone/frequency is detected on the input. The frequency f is determined by the values of R1 and C1, where f=1/(1.1 * R1 * C1). For security, using dual tone is more secure compared with using only single frequency. With single frequency, someone can easily find the secret […]
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When the volume control is turned down, sometimes it causes the sound to be “dulled”. The series resistance of the pot interacting with the capacitance of the next stage to form a low pass filter and a resulting high frequency loss causing the dull volume control. To prevent this, a small capacitor can be added from the input to the […]
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This is a simple Low-Pass and High-Pass RC Filter Frequency Calculator. This calculator is used to calculate the corner frequency of low pass and high pass filter. To change from low pass to high pass, just switch the position of the resistor and capacitor. The corner frequency does not change because the calculator assumes a low source impedance. Here is […]
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In personal electronics and computer audio system, the SSM2167 is a complete and flexible solution for conditioning microphone inputs. It is also very good for improving vocal clarity in communications and public address systems. Although it is not mentioned to be applied for electric guitar in the datasheet, the frequency response of this signal processor shows that it can be […]
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