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240v to 5v for wireless charging circuit

Nogarossi

Jul 15, 2015
2
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Jul 15, 2015
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Hi All,

I am a complete electronics novice, so I hope you can be patient with me. Hopefully by the time I've finished my project I'll have something to share :)

I'm currently working on a design for a lamp that includes an integrated wireless charging transmitter in the base. The original plan was to use a braided 3 core cable for power supply to the lampholder electrics (its prettier...), but that creates a challenge...

The wireless charging module requires a 5v power input. What are your recommendations for integrating the 240v cable and the 5v circuit?

Thanks in advance,

James
 

Harald Kapp

Moderator
Moderator
Nov 17, 2011
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Hi Kames, welcome to electronicspoint.

Get an off the shelf USB wall wart.
 

KMoffett

Jan 21, 2009
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Jan 21, 2009
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How much current do you need for the 5V circuit? How much room do you have in the lamp base?
Ken
 

Nogarossi

Jul 15, 2015
2
Joined
Jul 15, 2015
Messages
2
Hi Ken,

Input current is 2amps. Space is a little flexible as I can change the base design to fit the requirement, but for arguments sake, lets say L: 120mm H: 30mm, W: 12mm - its pretty tight!

James
 

KMoffett

Jan 21, 2009
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Jan 21, 2009
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There are a lot of small 5v/2A switch mode power supply modules/PCBs out there off the shelf.
Google: 5V/2a SMPS modules
You will have to look around a little to find one close to your dimensions and input voltage.
I've also gutted (very carefully) wall warts to get small power supplies circuit boards. And they're usually free ...if you check you junk drawer or in your friands'

Ken
 
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