Compact 1 channel power supply - Page 1
Forum section: electronics / testgear

author: alank2
author_rank: Super Contributor
timestamp: March 16, 2019, 04:08:31 pm
content: Hi Everyone,What are good choices out there for a compact 1CH power supply?Thanks!Alan

author: ebastler
author_rank: Super Contributor
timestamp: March 16, 2019, 04:26:22 pm
content: Voltage range? Current needs? Do you mean a lab power supply, with current limiting capability etc.? Required resolution for voltage and current limit setting? Do you need remote control capability? ...

author: Old Printer
author_rank: Frequent Contributor
timestamp: March 16, 2019, 04:45:26 pm
content: I love the old HP 62XX series. Built like a tank, serviceable, full documentation freely available, many variations covering voltage and current. Stackable and isolated to creat multi channel outputs. Usually under $75 for a nice one many under $50.

author: rsjsouza
author_rank: Super Contributor
timestamp: March 16, 2019, 06:23:58 pm
content: Quote from: ebastler on March 16, 2019, 04:26:22 pmExactly. The answer to these questions can narrow the range from a simple chinese brand and model discussed in the other thread below up to very high end stuff.https://www.eevblog.com/forum/testgear/3-channel-psu-without-problems/

author: tautech
author_rank: Super Contributor
timestamp: March 16, 2019, 07:29:44 pm
content: Quote from: alank2 on March 16, 2019, 04:08:31 pmAlan, you're not giving us much to go on so from the bottom end but OK SMPS:https://www.eevblog.com/forum/testgear/cheap-variable-switching-power-supply/https://www.eevblog.com/forum/testgear/mch-k305d-cheap-switching-lab-power-supply/Or something you can't easily measure the ripple on:There's 2 models of these ^ and Defpom has done videos on each.Thread:https://www.eevblog.com/forum/testgear/new-spd1168x-siglent-psu/

author: MarkF
author_rank: Super Contributor
timestamp: March 16, 2019, 07:29:51 pm
content: I like these little puppies. I have four of them.You can find them on eBay for around $50USD shipping included.

author: Fungus
author_rank: Super Contributor
timestamp: March 16, 2019, 07:34:11 pm
content: Quote from: MarkF on March 16, 2019, 07:29:51 pmNot if you live outside the USA, you can't.Theseare very compact (about the size of a thick paperback book, I've got bigger multimeters) and work wellifyou use proper cables with them instead of the junk cables that come in the box. Google has lots of info/teardowns/tests/reviews.There's also these:I haven't had much luck with those myself.

author: bd139
author_rank: Super Contributor
timestamp: March 16, 2019, 07:35:11 pm
content: Yes you can - I bought one in UK for £30 once.However watch out for them - the plastic goes brittle and they tend to self-disassemble in transit, which is what happend to mine. Also they have horrible old buzzy HP transformers in them.Very nice when they're not knackered though!

author: MarkF
author_rank: Super Contributor
timestamp: March 16, 2019, 07:36:40 pm
content: Quote from: Fungus on March 16, 2019, 07:34:11 pmWell ...When people don't show their country code ....

author: nctnico
author_rank: Super Contributor
timestamp: March 16, 2019, 07:43:54 pm
content: If you don't care about noise & ripple on the supply but just need something compact then this is worth looking at:https://www.eevblog.com/forum/testgear/cheap-variable-switching-power-supply/But be aware that you'll need to check it for safety and it may need upgrading. I use mine to power equipment which needs a DC input. The compactness and lack of acoustic noise is definitely a plus.

author: joeqsmith
author_rank: Super Contributor
timestamp: March 17, 2019, 12:23:12 am
content: Perhaps stacking a couple of coin cells. Small, low noise.

author: alank2
author_rank: Super Contributor
timestamp: March 17, 2019, 12:41:51 am
content: Sorry for not providing more info. I have a DP832 and like it, but am looking for something to use while sitting in a recliner next to a table where I work on projects from time to time. Not an ideal place to work, space is at a premium, but convenient. I like that I can set the voltage and current limits easily so I am looking for something like that. Being able to punch in a voltage/current and keep watch on the power supply as I make changes to a breadboard is critical in case I short something. So similar features as the DP832 but 1CH and as small and compact as I can get it. Don't care about remote control or any of that. Do want a digital readout and digital control of voltage/current.

author: mdijkens
author_rank: Regular Contributor
timestamp: March 17, 2019, 01:46:45 am
content: I have a better one but I use one ofthesein a small 10x10x5 case most of the time.I just plug in the power-adapter of my laptop and use it.

author: nctnico
author_rank: Super Contributor
timestamp: March 17, 2019, 01:57:41 am
content: In that case Keysight's E36100 series come to mind. The output power isn't stellar though (40W max). I think someone reviewed them a long time ago. If you want to use a PSU for experimenting then I'd recommend getting one which isn't a switching PSU but a linear one.

author: hwj-d
author_rank: Frequent Contributor
timestamp: March 17, 2019, 03:08:55 am
content: How about an ITECH IT6720 or a Rigol DP700, Korad KD3005D?

author: Diabolo
author_rank: Regular Contributor
timestamp: March 18, 2019, 04:02:08 pm
content: Hello,Power unit Gophert 3205 ?-https://fr.aliexpress.com/item/GOPHERT-CPS-3205-II-Digital-DC-Power-Supply-32V-5A-OVP-OCP-OTP-EU-plug-0/32827322437.htmlDiabolo

author: Fungus
author_rank: Super Contributor
timestamp: March 18, 2019, 05:09:23 pm
content: Quote from: Diabolo on March 18, 2019, 04:02:08 pmI already mentioned those, they seem a good match for this job.

author: jwm_
author_rank: Frequent Contributor
timestamp: March 18, 2019, 05:32:54 pm
content: I have one of these handheld Tekpower units that are pretty nice. form factor of a multimeterhttps://www.amazon.com/Tekpower-TP3016M-Portable-Handheld-Variable/dp/B015OA1J82It's currently been camping with me a few times and stood up to a fair amount of abuse so seems well built.My main gripe is it will go into overcurrent shutoff when you do a dead short of the leads and you have to press a button to clear it. not really an issue in practice, I am not sure why they implemented it that way.It is also switching rather than linear, which may or may not be an issue for you.John