3 V POWER SUPPLY circuit diagram

[smhn72@gmail.com]

Salam to all

i need the diagram of 3v dc power supply to run my laser diod and i have 220v Ac as input voltages
can anybody please share????????????

 

[TuAtAu]

Salam to all

i need the diagram of 3v dc power supply to run my laser diod and i have 220v Ac as input voltages
can anybody please share????????????

normally you need to buy an adapter at any store to give you 9V~12V DC output. Then online find Switching Regulator, or LDO to buck the 9V~12V to 3V DC.

In more discrete explanation, you need a 220VAC -> transformer, full-wave bridge-rectifier, regulators -> 3VDC

What I can is give u the keywords, then you put some effort to find online, there is your solutions.

 

[Tahmid]

Use a transformer to step down the voltage. You can use a transformer that is rated at secondary voltage between 5V and 12V.

Rectify the output to DC using a bridge rectifier and filter the output DC with bulk capacitor. Feed this DC to a voltage regulator. You can use the LM317 regulator. Configure it to give 3V output. You can use any regulator that can provide 3V output.

LM317 datasheet: www.ti.com/lit/ds/symlink/lm117.pdf

Hope this helps.
Tahmid.