[Swansea Hackspace] bench power supply

[Andy Rush]

Yeah, I do my own anodising. I've got an *extremely* amateur budget rig I've cobbled together for anodising small prop pieces with the Low Current Density method, but it works well enough for my needs. I've mostly done anodising for decorative reasons, rather than anodising for corrosion resistance reasons, but the method is pretty much identical, just with a longer time in the anodising tank.

As to alloys. I'm not sure where you've read that, but from personal experience, 6082 takes to anodising easily (which is good, given that 6082 is the most common alloy for extruded aluminium sold by online retailers). 6060 series alloys (6061 and 6063-T1) take to anodising like a charm, but pretty much all alloys in the 6000 and 7000 series will take Types 2 and 3 anodising easily. 1000 through 5000 Series only really anodise with Type 1/chromic acid anodising, which I have never done -and given the equipment required, is virtually impossible for the amateur/hobbyist to do, anyway.


Cheers

Andy

________________________________
From: Hackspace <hackspace-bounces at swansea.hackspace.org.uk> on behalf of Andy Davies <andy at andydavies.info>
Sent: 18 August 2018 23:46
To: Swansea Hackspace
Subject: Re: [Swansea Hackspace] bench power supply

I thought you might [Smile]

Do you do your own? Are there grades of ally that are not suitable? I read that 6082 doesn’t work.

Cheers

Andy

From: Andy Rush<mailto:Andymrush at live.co.uk>
Sent: Saturday, August 18, 2018 7:27 PM
To: Swansea Hackspace<mailto:hackspace at swansea.hackspace.org.uk>
Subject: Re: [Swansea Hackspace] bench power supply


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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