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12Volts Supply USE Zener and 741 Op. Amp.

Audiophile Headphone Amplifier Kithttps://www.kidstoys9.com/2020/01/audiophile-headphone-amplifier-kit.htmlThis 12V Power Supply has, as its principle trademark, a low yield impedance. This is a truly alluring element in 12Volts Supplyvoltage sources and is accomplished with an enormous open circle gain that the operational intensifier has.

As a voltage reference, the Zener diode D1 is utilized, and a PNP transistor (Q1) is utilized to control the yield voltage.



To accomplish the soundness of the yield voltage, this voltage is nourished back to the non-modifying contribution of the operational speaker, through the resistor R4. Potentiometer P1 is utilized for fine change of the 12V force supply.

12V Power Supply utilizing Zener and 741 Op. Amp.

How the 12 volt power supply functions?

The upsetting contribution of the operational intensifier is kept up at 5.1 V by methods for the zener diode (D1)



In the event that the yield voltage drops, the voltage at the non-altering terminal of the operational additionally drops, much the same as the yield of the operational enhancer, causing the transistor Q1 to direct and raise the voltage yield. Along these lines the voltage12Volts Supply yield is balanced out. Likewise, the yield impedance is exceptionally low, because of the negative input.

The Op. Amp. yield impedance is additionally diminished by utilizing the capacitor C1.

Unregulated Power Supply - 12V Power Supply utilizing Zener and 741 Op. Amp.

The Zener diode D2 has additionally been incorporated with the goal that the managed yield of the operational enhancer can work around 7 Volts beneath the unregulated information.


Along these lines, the managed yield is kept up until the PNP transistor is immersed. This implies the unregulated info can fall beneath (inside around 200mV) of the directed yield. The yield of the unregulated source (A) can be somewhere in the range of 30 and 12.2 V. In this plan the yield is at around 18 V. 


Pin outline of IC 741 Op Amp

Note: The unregulated yield12Volts Supply (see point An in the subsequent outline) is associated with the unregulated contribution of the principal chart.

Rundown of segments of the 12 Volt Power Supply

1 741 operational speaker (U1)

1 PNP transistor (Q1)

2 5.1V Zener diode (D1, D2)

3 4.7k resistors (R1, R2, R3)

1 6.8k resistor (R4)

1 1k potentiometer (P1)

1 10uF (microfarad), electrolytic capacitor (C1)

1 240/120 VAC to 24 VAC transformer with focal tap and 1.5 A (T)

1 2200uF electrolytic capacitor, 50 V or more (C)

2 rectifier diodes 1N5400 or comparative (D)

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