So you can still use multiplexing and run off one pic. Its not just for scrolling displays.its not scrolling just flashing...
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So you can still use multiplexing and run off one pic. Its not just for scrolling displays.its not scrolling just flashing...
And I bet each one costs more than his entire project I had some and they are ace but priceyI have some Lumileds Luxeon Superflux LEDs that have 4 pins to send the heat to the copper on a pcb. Their maximum allowed current is 70mA and they are very bright over a wide angle.
Here is a photo.
Please post the datasheet or part number of your 150mA LEDs.View attachment 83159
And I bet each one costs more than his entire project I had some and they are ace but pricey
I soldered 36 red SuperFlux LEDs on stripboard with 9 current-limiting resistors. The LEDs used 53mA each. I mounted them in the plastic case of a compact cassette tape (remember them?).
It was a night-light that was way too bright. The heat from the LEDs crazed and yellowed the clear plastic of the case even though I had many cooling holes top and bottom and tall feet.
I bought some cheap Chinese flashlights as Christmas gifts. They have 24 white LEDs on one side and 3 white LEDs on one end. They came powered by 3 Super Heavy Duty AAA cells (they are not super and are not heavy duty). The flashlights cost 4 bucks so I paid for the batteries and got the flashlights for free. They are very bright and my flashlight has been used for many hours and is still bright.
I wonder if the LEDs will burn out soon if I use name-brand alkaline battery cells?
You talk funny over there. (I can't find smilies here anymore)
A TORCH is a fire, isn't it? Over here we use an electric flashlight.
there will be at least 15 i.e. 15x150mA= ~2.5Anot controlling brightness..Hi again,
Ok so your LED strings draw 150ma maximum, and how many strings do you plan to use?
Also, so you only want to flash the LED's right, not adjust their brightness once the circuit is set up?
These fine fellows in the picture have torches, burning brightly so that they can see where they are going.
View attachment 83191
(Picture copied from the Shetland News website.)
So I guess that if you consider the function of the item, that device with an incandescant lamp or an LED which one uses to find ones way in the dark, could also be referred to as a torch.
JimB