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alimentation 5V 1a for microcontroleur

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mmmary

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hello
i use for my project a circuit to generate 5V with transformer 220/5V because they are very small , i used them to respect the dimension of my circuit , 4 diodes 1N4007, capacitor 2200uF(16V), regulator7805 when i simuate wiyh isis i found 3.01V even, i used a diode zener with the regulator but i don't find 5V .please can someone help me
 

A 5V transformer produces a peak of 7V and the full wave bridge rectifier charges the filter capacitor to 5VDC when it has a full load. But the minimum input for a 7805 regulator is 7VDC as shown on its datasheet.
 

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