[Swansea Hackspace] bench power supply

[Andy Davies]

Many thanks Ceri. Would it be possible to run a couple of the 39V LEDS at the same time?

 https://uk.rs-online.com/web/p/cob-leds/1346713/?relevancy-data=636F3D3126696E3D4931384E525353746F636B4E756D626572266C753D656E266D6D3D6D61746368616C6C26706D3D5E5C647B362C377D7C5C647B31307D7C28283F69292852537C5253207C52532D293F5C647B337D285C73293F5B5C732D2F255C2E2C5D285C73293F5C647B332C347D292426706F3D3126736E3D592673723D2673743D52535F53544F434B5F4E554D4245522677633D4E4F4E45267573743D31333436373133267374613D3133343637313326 

Which supply would you go for?

Thanks

Andy 

From: Ceri Clatworthy 
Sent: Friday, August 10, 2018 4:15 PM
To: Swansea Hackspace 
Subject: Re: [Swansea Hackspace] bench power supply

I am pritty sure PSU ripple will not be visible.  

It's going to be in KHz range.
Probably burst not fixed rate 

Anyway 
You will still need a few Ohms resistor.
And 500uF will soak that up.

On Fri, 10 Aug 2018 12:57 Andy Davies, <andy at andydavies.info> wrote:

  CPC have a bigger range of Tenma units at better prices

  http://cpc.farnell.com/w/c/test-equipment/bench-power-supplies-sources-loads/bench-top-power-supplies/prl/results?output-voltage-max=40v|50v|56v|60v|75v|80v&sort=P_PRICE

  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.
        _______________________________________________
        Hackspace mailing list
        Hackspace at swansea.hackspace.org.uk
        http://swansea.hackspace.org.uk/mailman/listinfo/hackspace


         Virus-free. www.avg.com  


----------------------------------------------------------------------------
    _______________________________________________
    Hackspace mailing list
    Hackspace at swansea.hackspace.org.uk
    http://swansea.hackspace.org.uk/mailman/listinfo/hackspace


    _______________________________________________
    Hackspace mailing list
    Hackspace at swansea.hackspace.org.uk
    http://swansea.hackspace.org.uk/mailman/listinfo/hackspace





------------------------------------------------------------------------------
  _______________________________________________
  Hackspace mailing list
  Hackspace at swansea.hackspace.org.uk
  http://swansea.hackspace.org.uk/mailman/listinfo/hackspace

  _______________________________________________
  Hackspace mailing list
  Hackspace at swansea.hackspace.org.uk
  http://swansea.hackspace.org.uk/mailman/listinfo/hackspace



--------------------------------------------------------------------------------
_______________________________________________
Hackspace mailing list
Hackspace at swansea.hackspace.org.uk
http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://swansea.hackspace.org.uk/pipermail/hackspace/attachments/20180810/0945b165/attachment.html>