[Swansea Hackspace] bench power supply

[Andy Davies]

Thanks for spotting that the current control is adjusted with a screwdriver 

Is there any way to tell from the specs whether I am going to get flicker that would show up on video? i.e. does the ripple give a clue?

http://uk.farnell.com/tenma/72-2695/bench-power-supply-1-ch-60v-2a/dp/2563983

Many thanks

Andy

From: Ceri Clatworthy 
Sent: Friday, August 10, 2018 12:25 PM
To: Swansea Hackspace 
Subject: Re: [Swansea Hackspace] bench power supply

just had a look at the PSU, (would not load on my phone ?!!?!?!)

Looks suitable for you, BUT the current is ONLY adjustable with a screwdriver, !!!!!

I would recomend Farnell / RS / CPC etc not ebay ..

http://uk.farnell.com/w/c/test-measurement/bench-power-supplies-sources-loads/bench-top-power-supplies?no-of-outputs=1-output&output-voltage-max=60v&sort=P_PRICE



72-2695 -   Bench Power Supply, Linear, Adjustable, 1 Output, 0 V, 60 V, 0 A, 2 A  is £77 and from Farnell..



have not checked the specs,


but from Farnell, you can get refund / swap if it goes BANG.


>From eBay WHEN it goes BANG you are screwed !!!



On Thu, Aug 9, 2018 at 12:30 AM, Andy Davies <andy at andydavies.info> wrote:

  Hi Ceri

  I have three of these types for 6V (for powering a flashgun, 12V (for stepper motors and LEDs)) and 24V (for a stepper motor on a linear rail.

  I’m looking for something that is a complete unit such as https://www.ebay.co.uk/itm/Adjustable-Linear-DC-Bench-Power-Supply-0-50V-0-3A-Variable-CSI5003XE/222258220290?epid=1542954192&hash=item33bf9f4d02:g:H9sAAOSw5OpZr-V8

  but it is really important that no flicker shows up on the video at a shutter speed of 50fps.

  Many thanks

  Andy
  From: Ceri Clatworthy 
  Sent: Wednesday, August 08, 2018 8:20 PM
  To: Swansea Hackspace 
  Subject: Re: [Swansea Hackspace] bench power supply

  Quick Google. ... 

  https://www.amazon.co.uk/voltage-converter-switch-power-supply/dp/B0197PNKJG/ref=br_lf_m_basujxxaeroo5oa_img?_encoding=UTF8&s=electronics




  On Wed, 8 Aug 2018 20:17 Ceri Clatworthy, <ceri.clatworthy at gmail.com> wrote:

    That's a high voltage !!!!!!! 

    A simple current source circuit will work the best for LEDs 

    One of my first jobs was KRAZY high power LED lighting designer 

    If you can get a 40 or so Volt PSU.
    then easy circuit. ..
    But I do recommend a protection resistor too

    On Fri, 27 Jul 2018 12:45 Andy Davies, <andy at andydavies.info> wrote:

      PS It is also important that it does not induce flicker in the light as I will be shooting video with it.
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