555 multi-track oscilloscope additional circuit diagram

Filter 18.432M

As shown in the figure, the circuit is composed of 555. When used for multi-channel signal comparison, identify each channel signal.

555 multi-track oscilloscope additional circuit

555 and R1, RP, C1 constitute an astable multivibrator. The vertical trace of the oscilloscope scan line determines the vertical deflection voltage from the sum of the voltages across R4 and R5. When the 555 output is high, if the divided voltage on R4 is greater than the input voltage V1, the trace on the screen disappears; when 555 outputs low, the vertical position of the trace on the screen depends on the input signal itself. Thus, the trace of the input signal alternates with a dotted square line of the alternating square wave signal output with 555. In this way, each channel in the multipath can be distinguished. Each of the multiple paths can be attached with one such device and controlled by switches to enable identification of the various signals. It is required that the multi-resonant frequency f should be higher than about 10 times the frequency of the input detection signal for intermittent scanning display. The range of the 555 oscillation frequency of the illustrated parameters is between 1 kHz and 300 kHz, which is adjusted by the condition of the visual detection signal.
An oscilloscope is a widely used electronic measuring instrument. It can transform the invisible electrical signals into visible images, so that people can study the changes of various electrical phenomena. The oscilloscope uses a narrow, high-speed electron beam that strikes the phosphor-coated screen to create a small spot. Under the action of the signal under test, the electron beam is like the tip of a pen, which can plot the instantaneous value of the measured signal on the screen. The oscilloscope can be used to observe waveforms of various signal amplitudes over time, and can also be used to test various types of power, such as voltage, current, frequency, phase difference, amplitude, and so on.