Many Electronic circuit projects in simple ways of learning

3 Peak voltage tester circuits using op-amp

If you want to check the peak voltage of the signal to change at any time. Measuring with a multimeter will not do it. We recommend this circuit. It may help you.

Precision Peak voltage detector with a long memory time

We use this circuit The op-amp IC number CA3140 is the main equipment, acts as a voltage sensor that is accurate.

So It is precision peak voltage detector circuit, and it remembers voltage value in a long memory time.

In this circuit is used with a positive signal input, when has negative feedback only. And the inverting input can only get some feedback, when diode D1-1N4148 is forward biased. When we put the input signal is positive, the output voltage of op-amp increases equal to the inverting input signal.

In working, the capacitor C1 is charged to maximum voltage.

When the input is negative, the diode D1 will be reverse bias, the still voltage on the capacitor C1 but it is discharged slowly with an input current of the op-amp IC1 about 10pA.


Thus, this circuit can monitor a maximum (peak) voltage of more voltage signal and to remember them. For the following it with a multimeter.

Precision Peak voltage detector with a long memory time.

Dual limit comparator with LM709

This voltage comparator circuit gives a positive output when the input voltage is a positive or negative more than 8.5V.
But in between that the output is negative voltage.
The positive limit point is defined by the ratio of R1, R2, and the negative point by R1, R3.
The forward voltage drop across the diodes must be allowed from it before.
The output may be inverted by reversing the inputs to the operational amplifier IC1, that LM709 is used without frequency offset.

Dual limit comparator with LM709

Peak Detector by IC LF353

This is circuit Peak Detector voltage input, Use IC LF353
This be the circuit Peak Detector or checks pressure electricity topmost level is easily.Which I uses integrated number circuit LF353 be the integrated circuit op-amp perform measure electricity pressure or , compare with the pressure there. When see the circuit has already you will like. Because the equipment is a little and build easy. regard circuit idea well yes.

Peak Detector by IC LF353

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This Post Has 2 Comments

  1. So können die Kinder bei einem Kindergeburtstag auf dem Museumsschiff Mannheim
    an einer Fotorallye teilnehmen. Mindestteilnehmerzahl sechs
    Kinder (inkl. Die Kinder begeben sich auf dem Museumsschiff
    auf eine spannende Fotorallye durchs Schiff oder erwerben ein Schifferpatent.

  2. I am looking for a current peak detection, the application is 30amp ac power using a ACS 712 hall current sensor putting out 0-5 volts signal. I would like to regulate the peak output signal. Can you help?

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