I'm a newbie in electronics so I lack a lot of basic electronic knowledge.
I found this schematic about making regulated power supply 5 V and 12 V DC from AC. The diagram is below:
This is what I know about the schematic:
- J1 can transform the AC voltage using a voltage transformer
- The diode bridge converts AC to DC, but the converted DC is undulated
- C1 (electrolytic capacitor) and C2 (ceramic capacitor) are used to smooth out the undulated DC
- LM7805 and 7812 are regulators used to make the DC voltage constant 5 V/12 V for the J2/J3 output
- R1/R2 resistors are used to restrict current for D1/D2 LEDs. If both the LEDs lit up, we know there is current in the whole circuit.
I have some questions:
- Are the things I say above right or wrong?
- What is the use of capacitors C3, C4, C5, C6? Are they used to smooth out the DC, make the output DC more stabilized? What is the difference in the use of electrolytic capacitors and ceramic capacitors in this schematic?