Salient features of the circuit
Very Simple circuit to build
IC regulated stabilized power supply
Highly suitable for digital circuits
Compact in size and very economical to build
If one needs higher current supply, suitable Power transformer can be used with appropriate changes on the components values and heat sink
This set up needs no special heat sink
Fit to any case and any pocket
Working of the circuit design
PT converts 230 AC mains to 9V with 200mA current capacity.
9V AC is rectified by 1N 4001 power rectifier diode and smoothened by C1 470MFD electrolytic capacitor.
LED1 indicates that DC is available at point 1 for regulation.
IC 7805 is a voltage regulator which regulated the steady output voltage of 5V always.
12V DC available at pin 1 of IC 7805 is regulated and a steady +5V is available at the output pin 3 of the IC.
This 5V is further smoothened by C2 and any noise is suppressed with C3.
Components
|
Semiconductors |
Resistors |
Capacitors |
Others |
|
IC 7805 voltage regulator-1 |
1KΩ -1 |
470µ/16V - 1 |
PT- Power Transformer 230V/0-9V, 200mA |
|
1N4001 – rectifier diode -1 |
10µ/10V - 1 |
||
|
Red LED - 1 |
100n - 1 |
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