place of TIP2955.
The circuit is also using a 220V or 110V to 12V 5A step down transformer, a 10 ampere diode bridge to rectify the voltage coming from the transformer, a 3300uF capacitor for filtering and others are for decoupling.
A high current 9V power supply circuit can be made easily by using a transistor with LM7809 IC. The figure below shows a 9V 5A power supply circuit, in this circuit a TIP2955 transistor is used for boosting output current of the LM7809 positive voltage regulator IC. You can also use other similar transistors in the
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