[Swansea Hackspace] bench power supply

[Andy Rush]

Hey

Why yes, I do!


Andy (Lightsabers)

________________________________
From: Hackspace <hackspace-bounces at swansea.hackspace.org.uk> on behalf of Andy Davies <andy at andydavies.info>
Sent: 18 August 2018 17:40
To: Swansea Hackspace
Subject: Re: [Swansea Hackspace] bench power supply

Hi

Does anyone know about anodising aluminium?

Cheers

Andy

From: Ceri Clatworthy<mailto:ceri.clatworthy at gmail.com>
Sent: Friday, August 10, 2018 4:15 PM
To: Swansea Hackspace<mailto:hackspace at swansea.hackspace.org.uk>
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<mailto: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<http://cpc.farnell.com/w/c/test-equipment/bench-power-supplies-sources-loads/bench-top-power-supplies/prl/results?output-voltage-max=40v%7C50v%7C56v%7C60v%7C75v%7C80v&sort=P_PRICE>

From: Ceri Clatworthy<mailto:ceri.clatworthy at gmail.com>
Sent: Friday, August 10, 2018 12:25 PM
To: Swansea Hackspace<mailto:hackspace at swansea.hackspace.org.uk>
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<mailto: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<mailto:ceri.clatworthy at gmail.com>
Sent: Wednesday, August 08, 2018 8:20 PM
To: Swansea Hackspace<mailto:hackspace at swansea.hackspace.org.uk>
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<mailto: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<mailto: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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