/diy/ - Do It Yourself

>>140248
Sorry ignore that post, just realized it wouldnt be such a great idea as you would waste fuel .

Run the exhaust pipe into the back of the van using a metal pipe. You can get a controller to start the engine 10 minutes every 2 hours.

>>139597

Agreed, so long as the period is not greater than the realism of human interpretation of change of light then any MPX scheme should not be visible to humans.

>>139591
BTW I still believe my posts hold some truth. We will wait for external input for that from at least someone with a related degree or greater.

>>139590
Will do - Disregard my posts so far everyone else.

>>139585
Yes but due to continuous lighting (such as incandescent) you will see a weird flickering between digits in a MPX system. I see it all the time between MPX a-b-c-d as each seems to be "moving" with respect to static lighting.

>>139581
Atmospheric light meaning a continuous light without such duty cycle as the multiplex (MPX) frequency.

So if it is LED1, Continuous light such as the sun (l), LED2, (l),LED3,(l), LED4, (l), LED1..... you would see flickering between LED1 to LED 4, as you do.

>>139575
By MPX chain I mean the difference between atmospheric light and an LED output vs an LED output vs another on an MPX configuration (which is pulsed with respect to the original LED, and a certain degree out of phase) So the time between LED1 (original LED), to the second ( or N x multiplexed) , would be divided over the total amount multiplexed, right???

>>139572
http://www.webasto.com.au/products-and-markets/ena/html/8833.html

Insulation and a good sleeping bag coupled with a heater using the same fuel as your vehicle (search and you shall find) E.G http://www.caravanandmotorhomebooks.com/articles/diesel_heaters.htm

>>139566
I design and implement components on the transmission and distribution lines in my country (11000v - 225000v) so it is great to understand ELV works such as this thread.

>>139560
I didnt read it all but would the flicker be different between the LED and ambient (say sunlight) OR another LED in the MPX chain? it should because the other LED would be flickering at a division of the initial LED?? And so on for the chain?

>>139549
Hey thanks for that, bit drunk at the moment (Friday night), but this makes it alot clearer

>>139535
I see most IR remotes use a higher pulse current to overcome this, maybe 100ma for a 20ma max LED. Is this usually implemented to some degree?

>>139531
Just a question. Incandescent lights have a time period to reach full brightness limited by the time to get the tungsten to the white hot zone. LEDs must have some time period to get to full brightness I guess also the more channels you multiplex would restrict the maximum duty cycle?

>>139521
OK I see the idea but the pic doesn't show the whole picture. I see the only disadvantage to be cost, which is an advantage to us as we don't care about a few cents for capacitors if the increase in quality is worth it, where professional manufacturers need to save every cent. I don't see that pic at all relevant as the cap would charge and when charged extinguish the LED. What we need is kinda the opposite or the LED in parallel wit the cap and a transistor to short the cap when an off state is required.

>>139515
Zener and suitable fuse on the "high voltage" rail. I'm using quotes as in my field high voltage is anything over 1000VAC or 1500VDC

>>139510
Well use a transistor and be sure to tie the emitter low ( load in series with the collector). add protection incase of transistor SC.

>>139509
or a missing pulse detector of some sort to see when the PWM has halted and then SC the cap.

>>139507
Ah I didn't realize it was for fast moving graphics. Could you use a transistor to short the cap when turn off was required? Yes a waste of massive proportions on many levels, but should work right? kinda defies the point of mpxing as you need extra channels for the transistors :P

>>139503
Caps across the LED & dropper resistor that is.

>>139499
Can you use capacitors (with improvements to PSU and switcher transistor specs) to help minimize flickering, using a value suitable with respect to time constants.