Power Supply  - Page 1
Forum section: electronics / beginners

author: Kdog44
author_rank: Contributor
timestamp: July 06, 2014, 03:57:46 am
content: Hey guys! I am knew to this forum and relatively new to electrical engineering. I was looking to purchase a variable power supply for my home. The input would be 120 VAC. My budget is around $100 I would prefer there to be a current control knob as well. I live in Canada but would be willing to purchase something from US. What would you all recommend as a good quality power supply.Thanks

author: Kappes Buur
author_rank: Regular Contributor
timestamp: July 06, 2014, 05:16:26 am
content: http://www.ebay.ca/itm/GQ-A305D-Variable-30V-5A-DC-Power-Supply-with-CC-CV-mode-0-30V-/121367626292?pt=LH_DefaultDomain_2&hash=item1c42130234http://www.ebay.ca/itm/30V-10A-DC-Digital-Precision-Power-Supply-Lab-Grade-3010D-Adjustable-New-/360937435565?pt=LH_DefaultDomain_0&hash=item54098c31ad

author: Lee697
author_rank: Regular Contributor
timestamp: July 06, 2014, 07:43:23 am
content: What output voltage/current range are you after??

author: Kdog44
author_rank: Contributor
timestamp: July 06, 2014, 06:16:57 pm
content: I would like 0-20 V and 0-4A.

author: nanofrog
author_rank: Super Contributor
timestamp: July 06, 2014, 08:56:12 pm
content: Quote from: Kdog44 on July 06, 2014, 06:16:57 pmWould you be willing to purchase a used unit?It's possible to get a lot more power supply for the money this way, such as a triple output unit that meets your specs. Worth checking into IMHO.

author: ProBang2
author_rank: Frequent Contributor
timestamp: July 07, 2014, 01:33:19 am
content: What´s about the Korad 3005D?No fiddling with course and fine adjustments...Current adjustment in 1 milliamp steps.http://www.amazon.com/KORAD-KA3005D-Precision-Adjustable-Regulated/dp/B0084JFWNY/ref=sr_1_2?ie=UTF8&qid=1404692452&sr=8-2&keywords=korad+ka3005pThe PSU is meanwhile very reliable.Note: The failure in the following review only occurred with 230V mains.Amazon reports some issues with the power switch in the past.I can´t confirm that. Perhaps I have a newer version.The programmable version, teardown:The programmable version, review (failed):Failure fixed:and tested:BTW: The Korad 3005D is in Germany priced with 79.90 € (around 110 US-$).Amazon is not the cheapest source, probably. Google in your region for the PSU.Greetings,Hartmut

author: XOIIO
author_rank: Super Contributor
timestamp: July 07, 2014, 02:37:34 am
content: That korad sure is a nice one, that's tempting to get but when I get a new one a dual variable output one would be great.

author: rdl
author_rank: Super Contributor
timestamp: July 07, 2014, 06:00:27 am
content: How about a Korad dual supply with bonus 5 volt supply thrown in?http://sra-solder.com/product.php/7015/128/korad_ka3005d_s_dc_precision_variable_dc_triple_power_supplyQuote from: XOIIO on July 07, 2014, 02:37:34 am

author: XOIIO
author_rank: Super Contributor
timestamp: July 07, 2014, 09:33:30 am
content: Quote from: rdl on July 07, 2014, 06:00:27 amAh nice, ebay ones are around that price for dual variable outputs and 5v as well, so pretty good to go with a more well known brand, though that is with the $40 off, hopefully that is still the case some time from now.

author: Kdog44
author_rank: Contributor
timestamp: July 15, 2014, 09:30:53 am
content: Thanks for the input. I ended up going with a cheaper power supply that my hackerspace also has:http://www.amazon.ca/Displays-Digital-Precision-Supply-Adjustable/dp/B00C056Q7Y/ref=sr_1_21?ie=UTF8&qid=1405416515&sr=8-21&keywords=power+supplyI do like the Korad, although the added memory functions didn't seem that useful to me for the extra price.