[Swansea Hackspace] bench power supply

[Ceri Clatworthy]

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 <ceri.clatworthy at gmail.com>
> *Sent:* Friday, August 10, 2018 12:25 PM
> *To:* Swansea Hackspace <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> 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 <ceri.clatworthy at gmail.com>
>> *Sent:* Wednesday, August 08, 2018 8:20 PM
>> *To:* Swansea Hackspace <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>
>> 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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>>>
>>
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