What happen if in a circuit of 10 Leds in series (each 3V 150mA rated), I replace one of them with another Led rated at 9V 150mA? The others will get dim or doesn't light up?
In this one, probably the diode or main IC. This is an older style, you can see some of my more recent videos for simpler designs. In general, longer life would come from lower amps through the individual LEDs, and then more LEDs to get the same lumens.
@@vrms4096 The one I just tested wasn't the darkened one, though on checking it again there were spots that were reaching 200 F on the back of LEDs. The darkened one had failed and was completely disassembled, so no way to test it now, I can only assume an over current that generated more heat prior to the failure.
@@eeAspect Manufactures push them at theirs limit, for a faster degradation. Ofthen, there are steps on the edges of mcpcb that can be filed, apply quality thermal past for decrease heat
What happen if in a circuit of 10 Leds in series (each 3V 150mA rated), I replace one of them with another Led rated at 9V 150mA?
The others will get dim or doesn't light up?
It would likely get dim. If you replaced too many it wouldn't light up.
What do you think the weak link is in this led light board ?? Could this be made simpler with longer life ??? Thanks
In this one, probably the diode or main IC.
This is an older style, you can see some of my more recent videos for simpler designs.
In general, longer life would come from lower amps through the individual LEDs, and then more LEDs to get the same lumens.
@@eeAspect Thank you for educating me Sir. WIll check out your other videos.
Hi, how much do you think it got hot? Board and LEDs? Could you measure and tell?
I hooked up the circuit board and LEDs not inside the heat sink cover and the L2 inductor was 90-100 F and the back of the LED heat sink was 90-140 F.
@@eeAspect It seems to be not a very high temperature, but such a strong darkening on the board Hmmm .... Got it, thanks.
@@vrms4096 The one I just tested wasn't the darkened one, though on checking it again there were spots that were reaching 200 F on the back of LEDs.
The darkened one had failed and was completely disassembled, so no way to test it now, I can only assume an over current that generated more heat prior to the failure.
@@eeAspect Manufactures push them at theirs limit, for a faster degradation.
Ofthen, there are steps on the edges of mcpcb that can be filed, apply quality thermal past for decrease heat
can you teardown a wifi color changing Bulb?
I have an IR controlled one that I'll be doing a video for. I don't have a wifi one at the moment, but if I pick one up I'll tear it down as well.
@@eeAspect The Wi-fi or bluetooth CCT/RGB bulbs are often in offer for a pairs of $ on Alexpress