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<DIV style="FONT-SIZE: 12pt; FONT-FAMILY: 'Calibri'; COLOR: #000000">
<DIV>Many thanks Ceri. Would it be possible to run a couple of the 39V LEDS at
the same time?</DIV>
<DIV> </DIV>
<DIV> <A
href="https://uk.rs-online.com/web/p/cob-leds/1346713/?relevancy-data=636F3D3126696E3D4931384E525353746F636B4E756D626572266C753D656E266D6D3D6D61746368616C6C26706D3D5E5C647B362C377D7C5C647B31307D7C28283F69292852537C5253207C52532D293F5C647B337D285C73293F5B5C732D2F255C2E2C5D285C73293F5C647B332C347D292426706F3D3126736E3D592673723D2673743D52535F53544F434B5F4E554D4245522677633D4E4F4E45267573743D31333436373133267374613D3133343637313326">https://uk.rs-online.com/web/p/cob-leds/1346713/?relevancy-data=636F3D3126696E3D4931384E525353746F636B4E756D626572266C753D656E266D6D3D6D61746368616C6C26706D3D5E5C647B362C377D7C5C647B31307D7C28283F69292852537C5253207C52532D293F5C647B337D285C73293F5B5C732D2F255C2E2C5D285C73293F5C647B332C347D292426706F3D3126736E3D592673723D2673743D52535F53544F434B5F4E554D4245522677633D4E4F4E45267573743D31333436373133267374613D3133343637313326</A>
<DIV> </DIV>
<DIV>Which supply would you go for?</DIV>
<DIV> </DIV>
<DIV>Thanks</DIV>
<DIV> </DIV>
<DIV>Andy </DIV></DIV>
<DIV
style='FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: "Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; DISPLAY: inline'>
<DIV style="FONT: 10pt tahoma">
<DIV> </DIV>
<DIV style="BACKGROUND: #f5f5f5">
<DIV style="font-color: black"><B>From:</B> <A title=ceri.clatworthy@gmail.com
href="mailto:ceri.clatworthy@gmail.com">Ceri Clatworthy</A> </DIV>
<DIV><B>Sent:</B> Friday, August 10, 2018 4:15 PM</DIV>
<DIV><B>To:</B> <A title=hackspace@swansea.hackspace.org.uk
href="mailto:hackspace@swansea.hackspace.org.uk">Swansea Hackspace</A> </DIV>
<DIV><B>Subject:</B> Re: [Swansea Hackspace] bench power
supply</DIV></DIV></DIV>
<DIV> </DIV></DIV>
<DIV
style='FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: "Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; DISPLAY: inline'>
<DIV>I am pritty sure PSU ripple will not be visible.
<DIV> </DIV>
<DIV>It's going to be in KHz range.</DIV>
<DIV>Probably burst not fixed rate </DIV>
<DIV> </DIV>
<DIV>Anyway </DIV>
<DIV>You will still need a few Ohms resistor.</DIV>
<DIV>And 500uF will soak that up.</DIV></DIV>
<DIV> </DIV>
<DIV class=gmail_quote>
<DIV dir=ltr>On Fri, 10 Aug 2018 12:57 Andy Davies, <<A
href="mailto:andy@andydavies.info">andy@andydavies.info</A>> wrote:<BR></DIV>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<DIV dir=ltr>
<DIV dir=ltr>
<DIV style="FONT-SIZE: 12pt; FONT-FAMILY: 'Calibri'; COLOR: #000000">
<DIV>CPC have a bigger range of Tenma units at better prices</DIV>
<DIV> </DIV>
<DIV><A
href="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"
rel=noreferrer
target=_blank>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</A></DIV>
<DIV
style='FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: "Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; DISPLAY: inline'>
<DIV style="FONT: 10pt tahoma">
<DIV> </DIV>
<DIV style="BACKGROUND: #f5f5f5">
<DIV><B>From:</B> <A title=ceri.clatworthy@gmail.com
href="mailto:ceri.clatworthy@gmail.com" rel=noreferrer target=_blank>Ceri
Clatworthy</A> </DIV>
<DIV><B>Sent:</B> Friday, August 10, 2018 12:25 PM</DIV>
<DIV><B>To:</B> <A title=hackspace@swansea.hackspace.org.uk
href="mailto:hackspace@swansea.hackspace.org.uk" rel=noreferrer
target=_blank>Swansea Hackspace</A> </DIV>
<DIV><B>Subject:</B> Re: [Swansea Hackspace] bench power
supply</DIV></DIV></DIV>
<DIV> </DIV></DIV>
<DIV
style='FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: "Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; DISPLAY: inline'>
<DIV dir=ltr>
<DIV class=gmail_default style='FONT-FAMILY: "comic sans ms",sans-serif'>just
had a look at the PSU, (would not load on my phone ?!!?!?!)</DIV>
<DIV class=gmail_default
style='FONT-FAMILY: "comic sans ms",sans-serif'> </DIV>
<DIV class=gmail_default style='FONT-FAMILY: "comic sans ms",sans-serif'>Looks
suitable for you, BUT the current is ONLY adjustable with a screwdriver,
!!!!!</DIV>
<DIV class=gmail_default
style='FONT-FAMILY: "comic sans ms",sans-serif'> </DIV>
<DIV class=gmail_default style='FONT-FAMILY: "comic sans ms",sans-serif'>I
would recomend Farnell / RS / CPC etc not ebay ..</DIV>
<DIV class=gmail_default
style='FONT-FAMILY: "comic sans ms",sans-serif'> </DIV>
<DIV class=gmail_default>
<H3 class=m_7120984441078923537gmail-itemTitle
style="BOX-SIZING: border-box; MARGIN: 0px; text-decoration-style: initial; text-decoration-color: initial"><FONT
color=#37474f face="Arial, Helvetica, sans-serif"><SPAN
style="FONT-SIZE: 20px; FONT-WEIGHT: 400"><A
href="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"
rel=noreferrer
target=_blank>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</A></SPAN></FONT><BR></H3>
<DIV><FONT color=#37474f face="Arial, Helvetica, sans-serif"><SPAN
style="FONT-SIZE: 20px; FONT-WEIGHT: 400"><BR></SPAN></FONT></DIV>
<DIV><FONT color=#37474f face="Arial, Helvetica, sans-serif"><SPAN
style="FONT-SIZE: 20px; FONT-WEIGHT: 400">
<H1
style="FONT-SIZE: 1.81em; BORDER-TOP: 0px; BORDER-RIGHT: 0px; WIDTH: 100%; VERTICAL-ALIGN: baseline; BACKGROUND: rgb(255,255,255); BORDER-BOTTOM: 0px; ZOOM: 1; FONT-WEIGHT: bold; COLOR: rgb(69,69,69); OUTLINE-WIDTH: 0px; PADDING-BOTTOM: 0px; PADDING-TOP: 0px; OUTLINE-STYLE: none; PADDING-LEFT: 0px; MARGIN: 0px; BORDER-LEFT: 0px; DISPLAY: inline; OUTLINE-COLOR: invert; PADDING-RIGHT: 0px; text-decoration-style: initial; text-decoration-color: initial">72-2695
- </H1><SPAN
style="FONT-SIZE: 11px; FONT-FAMILY: verdana,arial,helvetica,sans-serif; FLOAT: none; COLOR: rgb(51,51,51); DISPLAY: inline; BACKGROUND-COLOR: rgb(255,255,255); text-decoration-style: initial; text-decoration-color: initial"><SPAN> </SPAN></SPAN>
<H2
style="FONT-SIZE: 1.81em; BORDER-TOP: 0px; BORDER-RIGHT: 0px; WIDTH: 100%; VERTICAL-ALIGN: baseline; BACKGROUND: rgb(255,255,255); BORDER-BOTTOM: 0px; ZOOM: 1; FONT-WEIGHT: bold; COLOR: rgb(69,69,69); OUTLINE-WIDTH: 0px; PADDING-BOTTOM: 0px; PADDING-TOP: 0px; OUTLINE-STYLE: none; PADDING-LEFT: 0px; MARGIN: 0px; BORDER-LEFT: 0px; DISPLAY: inline; OUTLINE-COLOR: invert; PADDING-RIGHT: 0px; text-decoration-style: initial; text-decoration-color: initial"><SPAN
style="FONT-SIZE: 19px; BORDER-TOP: 0px; BORDER-RIGHT: 0px; VERTICAL-ALIGN: baseline; BACKGROUND: none transparent scroll repeat 0% 0%; BORDER-BOTTOM: 0px; ZOOM: 1; OUTLINE-WIDTH: 0px; PADDING-BOTTOM: 0px; PADDING-TOP: 0px; OUTLINE-STYLE: none; PADDING-LEFT: 0px; MARGIN: 0px; BORDER-LEFT: 0px; OUTLINE-COLOR: invert; PADDING-RIGHT: 0px">Bench
Power Supply, Linear, Adjustable, 1 Output, 0 V, 60 V, 0 A, 2
A</SPAN></H2> is £77 and from Farnell..<BR></SPAN></FONT></DIV>
<DIV><FONT color=#37474f face="Arial, Helvetica, sans-serif"><SPAN
style="FONT-SIZE: 20px; FONT-WEIGHT: 400"><BR></SPAN></FONT></DIV>
<DIV><FONT color=#37474f face="Arial, Helvetica, sans-serif"><SPAN
style="FONT-SIZE: 20px; FONT-WEIGHT: 400">have not checked the
specs,</SPAN></FONT></DIV>
<DIV><FONT color=#37474f face="Arial, Helvetica, sans-serif"><SPAN
style="FONT-SIZE: 20px; FONT-WEIGHT: 400"><BR></SPAN></FONT></DIV>
<DIV><FONT color=#37474f face="Arial, Helvetica, sans-serif"><SPAN
style="FONT-SIZE: 20px; FONT-WEIGHT: 400">but from Farnell, you can get refund
/ swap if it goes BANG.</SPAN></FONT></DIV>
<DIV><FONT color=#37474f face="Arial, Helvetica, sans-serif"><SPAN
style="FONT-SIZE: 20px; FONT-WEIGHT: 400"><BR></SPAN></FONT></DIV>
<DIV><FONT color=#37474f face="Arial, Helvetica, sans-serif"><SPAN
style="FONT-SIZE: 20px">From eBay WHEN it goes BANG you are screwed
!!!</SPAN></FONT></DIV></DIV>
<DIV class=gmail_default
style='FONT-FAMILY: "comic sans ms",sans-serif'> </DIV>
<DIV class=gmail_default
style='FONT-FAMILY: "comic sans ms",sans-serif'> </DIV></DIV>
<DIV class=gmail_extra>
<DIV> </DIV>
<DIV class=gmail_quote>On Thu, Aug 9, 2018 at 12:30 AM, Andy Davies <SPAN
dir=ltr><<A href="mailto:andy@andydavies.info" rel=noreferrer
target=_blank>andy@andydavies.info</A>></SPAN> wrote:<BR>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<DIV dir=ltr>
<DIV dir=ltr>
<DIV style="FONT-SIZE: 12pt; FONT-FAMILY: 'Calibri'; COLOR: #000000">
<DIV>Hi Ceri</DIV>
<DIV> </DIV>
<DIV>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.</DIV>
<DIV> </DIV>
<DIV>I’m looking for something that is a complete unit such as <A
href="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"
rel=noreferrer
target=_blank>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</A></DIV>
<DIV> </DIV>
<DIV>but it is really important that no flicker shows up on the video at a
shutter speed of 50fps.</DIV>
<DIV> </DIV>
<DIV>Many thanks</DIV>
<DIV> </DIV>
<DIV>Andy</DIV>
<DIV>
<DIV
style='FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: "Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; DISPLAY: inline'></DIV>
<DIV style="FONT: 10pt tahoma">
<DIV style="BACKGROUND: #f5f5f5">
<DIV><B>From:</B> <A title=ceri.clatworthy@gmail.com
href="mailto:ceri.clatworthy@gmail.com" rel=noreferrer target=_blank>Ceri
Clatworthy</A> </DIV>
<DIV><B>Sent:</B> Wednesday, August 08, 2018 8:20 PM</DIV>
<DIV><B>To:</B> <A title=hackspace@swansea.hackspace.org.uk
href="mailto:hackspace@swansea.hackspace.org.uk" rel=noreferrer
target=_blank>Swansea Hackspace</A> </DIV>
<DIV><B>Subject:</B> Re: [Swansea Hackspace] bench power
supply</DIV></DIV></DIV>
<DIV> </DIV></DIV>
<DIV
style='FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: "Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; DISPLAY: inline'>
<DIV>
<DIV class=m_7120984441078923537h5>
<DIV>Quick Google. ...
<DIV> </DIV>
<DIV><A
href="https://www.amazon.co.uk/voltage-converter-switch-power-supply/dp/B0197PNKJG/ref=br_lf_m_basujxxaeroo5oa_img?_encoding=UTF8&s=electronics"
rel=noreferrer
target=_blank>https://www.amazon.co.uk/voltage-converter-switch-power-supply/dp/B0197PNKJG/ref=br_lf_m_basujxxaeroo5oa_img?_encoding=UTF8&s=electronics</A><BR></DIV>
<DIV> </DIV>
<DIV> </DIV></DIV>
<DIV> </DIV>
<DIV class=gmail_quote>
<DIV dir=ltr>On Wed, 8 Aug 2018 20:17 Ceri Clatworthy, <<A
href="mailto:ceri.clatworthy@gmail.com" rel=noreferrer
target=_blank>ceri.clatworthy@gmail.com</A>> wrote:<BR></DIV>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<DIV>That's a high voltage !!!!!!!
<DIV> </DIV>
<DIV>A simple current source circuit will work the best for LEDs </DIV>
<DIV> </DIV>
<DIV>One of my first jobs was KRAZY high power LED lighting designer
</DIV>
<DIV> </DIV>
<DIV>If you can get a 40 or so Volt PSU.</DIV>
<DIV>then easy circuit. ..</DIV>
<DIV>But I do recommend a protection resistor too</DIV></DIV>
<DIV> </DIV>
<DIV class=gmail_quote>
<DIV dir=ltr>On Fri, 27 Jul 2018 12:45 Andy Davies, <<A
href="mailto:andy@andydavies.info" rel="noreferrer noreferrer"
target=_blank>andy@andydavies.info</A>> wrote:<BR></DIV>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<DIV dir=ltr>
<DIV dir=ltr>
<DIV style="FONT-SIZE: 12pt; FONT-FAMILY: 'Calibri'; COLOR: #000000">
<DIV>PS It is also important that it does not induce flicker in the
light as I will be shooting video with
it.</DIV></DIV></DIV></DIV>_______________________________________________<BR>Hackspace
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