A Burning CANDLE in Epoxy Resin - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: June 21, 2020, 11:03:42 am
content: This was just entertaining to watch...........My mind starts thinking RGB and controllers.

author: VK3DRB
author_rank: Super Contributor
timestamp: June 23, 2020, 12:12:28 am
content: Very interesting and entertaining. The same techniques could be used to make custom-made connectors, standoffs, LED light diffusers and bezels.

author: ciccio
author_rank: Frequent Contributor
timestamp: June 23, 2020, 05:12:07 pm
content: No current limit resistor?

author: John B
author_rank: Frequent Contributor
timestamp: June 24, 2020, 03:34:35 am
content: Quote from: ciccio on June 23, 2020, 05:12:07 pmIt's actually pretty typical to just use a coin cell directly to an LED in $1 novelty devices.However I would definitely want to have a proper driver circuit in this case to protect the LEDs. After all that effort, imagine blowing the LEDs...

author: digsys
author_rank: Unknown
timestamp: June 24, 2020, 03:54:52 am
content: wonder how you could make it flicker !! that would be 4x cooler :-)

author: james_s
author_rank: Super Contributor
timestamp: June 24, 2020, 04:53:30 am
content: Any microcontroller could do that. There are at least a few that are in little SOT packages.

author: JackJones
author_rank: Regular Contributor
timestamp: June 24, 2020, 05:01:57 am
content: There are LEDs with a controller built in that make them flicker like a candle. Flicker or candle LEDs is what they are called. A bit hard to get in SMD packages, they only seem to be widely available in 3 mm and 5 mm though hole variants.

author: jonovid
author_rank: Super Contributor
timestamp: June 24, 2020, 05:48:08 am
content: I would like to see some magic smoke captured in resin.just the thing for Dave's lab, ... an idea for mail-bag.or how about have a cheap fake iphone charger pcb explosionwith the flash and flames captured in resin,

author: PA0PBZ
author_rank: Super Contributor
timestamp: June 24, 2020, 10:28:27 am
content: Funny how the leds seem to light up under UV.

author: Yansi
author_rank: Super Contributor
timestamp: June 24, 2020, 01:30:05 pm
content: Quote from: PA0PBZ on June 24, 2020, 10:28:27 amWhite LEDs actually emit blue or UV and use a phosphor to create the white light. No surprises there.

author: DrG
author_rank: Super Contributor
timestamp: June 24, 2020, 06:41:26 pm
content: Quote from: JackJones on June 24, 2020, 05:01:57 amtrue datHere is mine....I think they were 2/US1$ and included a CR2032. The 'flicker' is not that candle-like, but they do flicker. Nothing in them but an LED, on-off switch and the battery.If you look carefully, you can see the IC inside the LEDHere is a head on shotThese are as good as I could get with my lens.

author: DrG
author_rank: Super Contributor
timestamp: June 24, 2020, 06:45:50 pm
content: Quote from: jonovid on June 24, 2020, 05:48:08 am

author: DrG
author_rank: Super Contributor
timestamp: June 24, 2020, 06:48:42 pm
content: Here is another resin project. Very impressive but a FAIL (watch to the end). I really did like the way he used the fiber optics with LED shells.BTW: lest anyone think I am being critical of the effort, I am aware that if I attempted the project the video would finish with me in the ER.

author: james_s
author_rank: Super Contributor
timestamp: June 24, 2020, 07:36:20 pm
content: Those flickering LEDs used in the little tealight candles never really impressed me much, they don't look candle-like at all. An actual candle doesn't really flicker much, it will waver a bit and may flicker in a breeze but the LEDs look quite exaggerated. I think a small microcontroller could do much better, especially with this candle that has two LEDs wired independently.

author: DrG
author_rank: Super Contributor
timestamp: June 26, 2020, 01:39:45 pm
content: Quote from: james_s on June 24, 2020, 07:36:20 pmNo, they don't impress me at all either (as you could probably tell from my original statement).I like this guy's empirical approachhttps://cpldcpu.wordpress.com/2016/01/05/reverse-engineering-a-real-candle/