Variable power supply

Other Hardware General Electronics
1

I know this isn't the best place to ask this question, but I thought you guys might be able to help me out.

I'm thinking about buying a variable power supply that doesn't exceed $150. I don't really need it to do very advanced things but at the same time I dont want it to be a waste of monney. I'd use it to try low voltage DC circuits.

I thought this one could be good : KORAD KA3005D 0~30V 0~5A Precision Adjustable DC Power Supply DC Digital Control with Test Leads Sale - Banggood USA-arrival notice-arrival notice

What do you guys think of it? Any recommendations?

2

Hi,
My company supplies THIS ONE at $90 but not free shipping. You could email and ask shipping for your location. Comes with test leads.

I use this all the time and really like it..

DISCLAIMER: Mentioned stuff from my own shop...

3

Here is one I got, they refill back orders often.
Lab power supply. 2X +-30v @ 0-3amps and 5v @ 3 amps.
They have others also.

http://www.mpja.com/Variable-Dual-0-30V-3A-and-Fixed-5V-3A-Benchtop-Supply/productinfo/29623+PS/

4

There should be lots of options at that price level. My usual complaint with the common 0-30V types is their output current can be quite limited, 1A or less. Certainly it was rare to find more than that amount of current up until 10 years ago, without a huge jump in price.

Something with readouts for both current and voltage is invaluable when testing. I have a much older supply that was given to me and it's permanently connected to two multimeters to show current and voltage.

My fixed 5V supply is very rarely used. Like, never. I always just set the variable supply to 5V and use that when I need 5V.

5

I have a couple Tenma 0-20VDC 5A CV/CC supplies, along with a fixed 5V and 12V at alot-o-amps, but I never use them. I also have a 4 port USB charger (one port is a 2600mAh battery) which is semi useful, so I don't have to run UCs off the computer USB ports.

I really thought I would end up with a dual supply to mess with some opamps, but it never became an issue.

6

About 6 months ago, I purchased a 0 - 30 VDC @ 5 A power supply from Marlin P. Jones Associates in Florida. It has digital displays for both voltage and current, course and fine adjustment for both, and is very compact. The cost including shipping was about $ 70.00. Really well built unit and very reliable. Their website is mpja.com .

7

I brought a 7,5 volts 1 Amp source, for my breadboard source. Some 9 EUR. Attention paid to match the breadboard connector (not the same to the consumer sources!).

Breadboard source was another 2 EUR or some.

I added a 2 EUR panel voltmeter (red LEDs, this is beautiful :-).

I have now a dual 3.3 V / 5 V at a cost of 13 EUR.

The whole thing cannot supply more than 600 mA, but I found it sufficient as a beginner. I will go mobile when completed the prototypes, so this power is even more than I need.

+++

All items are available worldwide.

8

Ive already decided what I want to buy, but thanks for the advice. I went with a Tenma 30Vdc 3A supply that I found in Amazon and I think it'll do the job for a couple of years.