Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

3 V POWER SUPPLY circuit diagram

Status
Not open for further replies.
S

smhn72@gmail.com

Member level 3
Joined
Oct 5, 2012
Messages
60
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Activity points
1,702
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????????????
 

smhn72@gmail.com said:
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????????????
Click to expand...

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. :)
 
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.
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top