SamSuka
bigclive
bigclive

patreon


Random LED conversion.

I have a slim striplight mounted above my laptop so I can see the keyboard and surrounding stuff.  It failed and I didn't have a new tube, so I decided to adapt it to LED with a bit of 12V tape and a bodged power supply using a standard 3W LED driver.

https://www.youtube.com/watch?v=7_ds5XFJvPs

It's a current regulated supply which means it relies on enough LED circuits on the tape to keep the current through the LEDs at a reasonable level.  It does mean that if some LEDs fail in the strip then the current through the others could go up, but I'd probably change the tape if they started flickering.

Random LED conversion.

Comments

The LEDs will work well as a nightlight even at very low currents like 1mA.

Big Clive

Oh, gotta check that out. Not sure if I missed it or just forgot. I'm not that good with electronics but since those resistors are in series I presume they get the same load. The rear of the housing got to ~35-40*C so internals are quite a bit higher than that, it did smell toasty though it might have been the flux? (which I cleaned after). With my limited knowledge I decided to swap the resistors. The intensity was about right for my use, could be a bit lower, so I went for two pairs of 68k "1/4W" (chinese spec..) in series as I didn't have any 82k's on hand. So 60k to 68k, not sure I noticed a difference in the output but I presume these resistors will live a happier, a fuller life than the previous ones would've. <a href="https://imgur.com/a/EF4Ru2Y" rel="nofollow noopener" target="_blank">https://imgur.com/a/EF4Ru2Y</a> Ghetto AF but if it works it works. P.S. Thank you for answering :) P.P.S. Aah it was the Baymax light, I forgot about that.

Kind of a side-note, but if you haven't already, you should try to get your hands on some Lee Zircon filters to get even better warm-whites from your LEDs. I've wanted to try them out for some time now, and finally had a project where light quality mattered more than just raw output for some 3200K LED fresnels we have. The test-pack with all of the different correction filters (14) should be around £30. The difference, even with quite new fixtures, were pretty impressive. Didn't get the CTB filters in the pack I bought, but would suspect they also do a decent job. The CTO and minus green were nice though.

I featured a similar nightlight recently, but based on a single resistor. It's a common arrangement. They often push the resistors quite hard for intensity.

Big Clive

Talking of LED's, have you seen a night light design like this before? It uses the MB6F chip, 4-pin bridge rectifier, and a couple of 30K resistors. Single side PCB. <a href="https://imgur.com/a/QIUAtz5" rel="nofollow noopener" target="_blank">https://imgur.com/a/QIUAtz5</a> How safe does that look, is it a "fire waiting to happen"?

Ah, that makes sense. I thought constant voltage was correct until you hooked up that little driver and cast doubt. 🙂 Thanks for the info. Pretty handy that your 'cheat' worked out perfectly. 👍🏻

The correct type for standard 12V tape is a constant voltage power supply. I was cheating in this instance by using a current regulated one that just so happened to supply the current required by the length of tape and therefore the voltage sat down to just under 12V. If used with half the length of tape it would overdrive the LEDs at higher current, and with a bit of tape twice as long the current would be the same, but shared between all the LEDs.

Big Clive

I'm a bit confused as to what driver to use with LED tape. Constant voltage? Constant current?

Longer is generally better. Life is like that.

Longer is better.

Love the longer videos, often I'll re-watch your 45+ minute videos since I enjoy hearing your random thoughts and stories that come up in them. Keep up the good work and videos!

It looks a great piece of kit for £47.

Gadgetman

BTW I am helping a friend of mine update his lighting in his RV to LED's thankfully 99% of them are 12vdc. But I am finding that the self stick LED tape doesn't adhere well. I've even cleaned with acetone. I guess I need to buy better LED tape.

Charles Bruckner

i love all your videos, im not sure why i dont know anything about electronics but here i am paying to see them

Steven Cox

You forgot to mention... It'll cause the local nuns to give birth to mutants.

Scott Miller

The one I use is part of my Yihua 8786D soldering station.

Big Clive

BOB ROSS... that's what your videos remind me of, electronics version of Bob Ross. That's been driving me nuts for years.

Zach Allin

Is it just me, or does anyone else’s mouth water when he says “juicy lead based solder”? I like the longer vids.

btSchmieds

Great video, don't mind the longer ones. What heat gun do you use/ recommend?

Gadgetman

For God's sake, Man, don't forget to properly dispose of that old fluorescent bulb. It contains about 40 tonnes of MERCURY, that will kill about 328 people and one horse. Let's be responsible, out there.....

Chuck Kirchner

I'm not allowed clutter. 'The Dragon' won't let me make a mess I have to tidy up every time I finish 'playing' in my shack.

Nuts 'n' Proud

Clive, please pretty, please, with alcohol, zoom in for us crap sighted viewers. Thanks.

Nuts 'n' Proud

Nice video to relax to. Good Karma. Repeating a comment I've made previously on undersized/tight heatshrink - A squirt of isopropyl alcohol makes tight heatshrink slip beautifully over tight wires/joints - saved my bacon on many occasions... Also good for clipping / sliding reluctant covers on or off - less breakage of retaining clips. Evaporates leaving no residue :)

L. Brait

When I make these videos I do it as if you are here with me in the workshop. So it does make sense.

Big Clive

"probably"

Jeremy Impson

I have the same meter which I purchased probably 20 years ago for USD $169. It has been abused extensively and still works like the day I bought it. I recently got a Fluke meter only because it reads RMS voltage and has an AC-DC ammeter clamp function.

George Cohn

Yeah, I love the longer videos!

Agree with Richard B. Let us edit. I loved this video as it is just what I like to do. Watching you build and deliver little nuggets of info and wisdom is like therapy. I have converted all my outdoor quartz halogen area floods and portable work floods to led. The main engineering challenge was to install new chunks of aluminium to adequately heat sink the led units. They work really well. I did these after you showed us self contained 30 or so watt square modules with driver included on the board. Really nice to use. I plan to make led units to replace 8’ fluorescents in my large woodworking shop. The tape you used is perfect for that. Metal framing studs are perfect for structure, reflective base and heat dissipation too.

An empty desk is the sign of an empty mind!

Don't cut, leave that to the viewers, I personally like you rambling and the full video... cheers,

Richard Boyce

Clive , these are the kinds of videos I enjoy the most. Other than the ones when you eat something really spicy and start hiccuping.

Charles Bruckner

Thumbs up for that LED light! Sometimes my hands want to reach into the video, cut off excess lengths of wire, hold a wire with a tweezer while you solder it. Is that weird? Any psychologists who can find out what syndrome I might have?

For the "water proof" led strips, I cut straight down with a razor, then fold back and the silicone will pop off. That's worked well for me in the past.

Please show your cluttered bench sometime :)

Paul Schuur


More Creators