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<\/a><\/p>\nThe circuit worked well pretty much straight from the design with little modification.\u00a0 I designed a PCB and ordered it from Itead. Their minimum order is 10 but that is what I wanted anyway.\u00a0 4 weeks later they arrived.\u00a0 I assembled one and it worked straight away.\u00a0 The only problem was that I got a few artefacts when I put it on a long power cable.\u00a0 I had expected this and designed the PCB accordingly.\u00a0 The solution was a 100uF cap across the power wires.<\/p>\n
They worked beautifully for several weeks.\u00a0 Then they started to fail.\u00a0 The LED’s, although not running hot and only at 80% of their power rating were going open circuit.\u00a0 Of the original 10 only 3 have survived fully working and a further 2 are part working.\u00a0 I’ve run out of LEDs and I can’t be bothered fixing any more.<\/p>\n
In addition to the surviving lamps I now have some 10W strip LEDs.\u00a0 I have bolted these to large heatsinks.\u00a0 There are 2 with 4 LED strips on them over each of the workbenches and 1 with 2 strips in the stores.\u00a0 The 40W ones are really good for working under.<\/p>\n
On 2 of the failed lamps I\u00a0removed all the 1W LEDs and put 12V strips in.\u00a0 These come in 2 temperatures 3200K and 6200K.\u00a0 I used\u00a02 of each on each lamp.\u00a0 All this went on a 0.5C\/W heatsink of which I have several.\u00a0 I added a control for each temperature on a box on a 2metre cable.\u00a0 The result is a variable colour temperature lamp.\u00a0 I gave this to my brother who is an artist.\u00a0 He loves it!<\/p>\n
The circuit itself works great.\u00a0 If only I’d chosen more reliable LEDs.<\/p>\n
PS.\u00a0 I have now replaced several of the lamps with commercial mains voltage downlighters but the workshop still uses the old ones.<\/p>\n
PPS. on the variable colour temperature lamp see seperate blog<\/p>\n","protected":false},"excerpt":{"rendered":"
When I first built the shed the lighting was provided by work lights on cables hung from hooks in the ceiling.\u00a0 It wasn’t very good. \u00a0As I mentioned in the […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[9,3],"tags":[],"_links":{"self":[{"href":"https:\/\/bassett.me\/mike\/blog\/wordpress\/wp-json\/wp\/v2\/posts\/383"}],"collection":[{"href":"https:\/\/bassett.me\/mike\/blog\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bassett.me\/mike\/blog\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bassett.me\/mike\/blog\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bassett.me\/mike\/blog\/wordpress\/wp-json\/wp\/v2\/comments?post=383"}],"version-history":[{"count":5,"href":"https:\/\/bassett.me\/mike\/blog\/wordpress\/wp-json\/wp\/v2\/posts\/383\/revisions"}],"predecessor-version":[{"id":836,"href":"https:\/\/bassett.me\/mike\/blog\/wordpress\/wp-json\/wp\/v2\/posts\/383\/revisions\/836"}],"wp:attachment":[{"href":"https:\/\/bassett.me\/mike\/blog\/wordpress\/wp-json\/wp\/v2\/media?parent=383"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bassett.me\/mike\/blog\/wordpress\/wp-json\/wp\/v2\/categories?post=383"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bassett.me\/mike\/blog\/wordpress\/wp-json\/wp\/v2\/tags?post=383"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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