Last driverless LED experiment. (Probably)
Added 2017-03-21 04:10:11 +0000 UTCOne more requested test on adding smoothing to the driverless LED. This version puts a lot less stress on the current regulating chips.
Comments
Even more satisfying if he'd shorted it with his tongue. Oh, wait, no. That's ElectroBOOM's channel.
Al Hunt
2017-03-21 15:49:15 +0000 UTCNice satisfying "click" when you shorted the capacitor. 👍
2017-03-21 15:18:42 +0000 UTCNice. This is why I'm a Patreon. I really enjoy when you dig deeper into these things.
Al Hunt
2017-03-21 14:58:47 +0000 UTCThanks Clive - very interesting extra video, I hope the Chinese manufacturers watch your videos before the market is flooded with these new driverless designs! I had a thought about putting a resistor in series with a capacitor to prevent the current spike of an empty capacity charging and the affect it has on how well the capacitor functions in the circuit... Can you use a resistor to prevent current spike on charging a capacitor as you have done here, but then have a Diode across the resistor in reverse polarity so that the capacity can still discharge through the diode without seeing the resistance of the inrush limiting resistor? If so - would that allow the capacity in your above video to smooth the LEDs better than it was able to with the resistor?
2017-03-21 10:45:10 +0000 UTCThe capacitor has to be rated for a modest voltage. In this case I made it suitable for the full open circuit voltage.
Big Clive
2017-03-21 05:52:22 +0000 UTCWhat happens with 1uF or 5uF capacitor ? Also why not use tantalum SMD caps, won't dry and won't overhang.
2017-03-21 05:25:42 +0000 UTCLooks like my suggestion works :D I'm going to get some of these and probably make this mod. I'm going to try an NTC inrush limiting resistor instead nabbed from pretty much any switchmode power supply of modest power
iamdarkyoshi
2017-03-21 04:19:30 +0000 UTC
