Neat looking power supply kit.

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This looks like a nice project for people getting started in electronics. *Corrected link. Moderator*

 

http://www.banggood.com/EU-220V-...

Last Edited: Fri. Sep 18, 2015 - 06:09 AM
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That's cute!

 

I use one I got from ebay a few years ago for 8 bucks. A tiny board with DC converter and 3 digit display. I power it from an old laptop power supply.

 

"We trained hard... but it seemed that every time we were beginning to form up into a team, we would be reorganized. I was to learn later in life that we tend to meet any new situation by reorganizing. And a wonderful method it can be of creating the illusion of progress while producing confusion, inefficiency and demoralization." Petronius Arbiter, approx. 2000 years ago.

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Nice, looks like it also has a clock generator and logic probe as well.

Looks like it would be handy for a student to use to learn EE degree.

 

Jim

 

Click Link: Get Free Stock: Retire early! PM for strategy

share.robinhood.com/jamesc3274

 

 

 

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http://www.ebay.com/itm/Mini-3A-...

 

This is a DC-DC converter about the size of a thumbnail that costs about a US dollar.  It regulates from about 2VDC to 20+VDC (potentiometer adjustable) from a +15 to +20VDC input wall-wart (also a few US dollars),  current up to about 3 Amps, and 85%+ efficiency. The IC has standard power supply protections in its design.

 

In my humble opinion, it is far superior to the 20th century big_box_with_lots_of_parts type of power supply.  I use them to refurbish any electronic equipment that has 7805 (780x) or LM317 linear regulators.

Last Edited: Wed. Sep 23, 2015 - 02:02 AM
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DP30V3A Constant Voltage and Current Step-down Programmable Power Supply Module

 

http://www.aliexpress.com/item/D...

 

When I use 10W led (900mA) with 10mA I can see some blinking on the led so the current is not stable but 40mA I can't see any blinking.  This is cheap and easy way to make your lab power supply.

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About 8 times less expensive than :

Linear Technology

DC2132A - 24V 3A Constant Voltage, Constant Current Bench Supply Featuring LT3081, LT8612, LT3092

May 22nd 2014

http://www.linear.com/solutions/5086

"Dare to be naïve." - Buckminster Fuller