A design idea with a 555 analog timer that can generate an arbitrary triangle/sawtooth with its waveshape and frequency controlled by pots.

Learn about how waves are measured according to amplitude, wavelength and frequency.

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Using again Equation 6b to find Q (t), keeping the first order in where Q0 is the oscillation amplitude for Q, we obtain where ...

Figure 1. Experimental arrangement of the amplitude modulator for digital communications based on CdS:Er The IA was driven by a sinusoidal input (carrier signal) of five volts of amplitude at 5kHz of ...