I thought you wanted to add one resistor to each of the existing resistors, that is why I said it would be fine. Yes with 150mA you burn just under 2W so you need a bigger resistor.However as I said before it looks like the LEDs, did you measure the forward voltage drop of them?
If it were me, I would take everything else out of the equation and just go for Regulated 5V supply and 68R resistor per LED for say 2 or 3 LEDS and 75R resistor for another 2 or 3 LEDS and just run them constantly on a breadboard until/if you see any difference.The Spec on the ebay advert says 3.2-3.8 forward volts 20-30mA forward current... So :-5 - 3.2 / 68 = 26.5mA // A little higher than typical but below max rating5 - 3.2 / 75 = 24mA // A little higher than typical but below max rating5 - 3.8 / 68 = 17.6mA // Approaching typical rating5 - 3.8 / 75 = 16ma // Approaching typical rating5 - 3.2 / 220 = 8.2mA // Expected to be quite dim5 - 3.8 / 220 = 5.5mA // Expected to be even dimmerThis will at least drive them closer to their rated spec and prove if it is the LED's or something else....Regards,Graham
Is it possible to damage an LED by driving them with too low of a current?
The writer seems to hint that the 5mm bulbs I was using aren't really for continuous use.
Are all LED packages SMD that I might possibly use in a situation like this?
Packaged LED devices, with proper thermal control,
Able to recommend a better dealer of LEDs?
data log the analogRead(x) values by connecting one of the analog inputs of the data logging device to the output of the power supply board, but with a resistor that will keep the current below the max operating for the data logger, eg if you have programmed an uno with an SD card shield to log the analog input on the pin connected, see the max operating current for the uno in its spec sheet.get a good number of samples, say leave it writing to an SD card all day. copy and paste your data into an spreadsheet and use the stats formulas to spot any surges/transient voltage spikes that have occurred. if its being rectified well enough and there is no decent spikes, well excluse the power supply and focus on the led circuit. in this case, and If you are not getting a few naughty little buggers at the fringes of the bell curve of kinetic energy distribution that are damaging your circuit, im not sure exactly what your problem is, ( in my case its almost always because ive rushed the pin out and its not wired like i wrote in my book or the person who wrote the project guide has recommended, ive soldered two IC pins together that short the MCU, SOMETHING silly) but ive attached photo of on of the component types i like for surge protection (range of this design, not the exact one i have attached a pic of) and they seem to be very popular
at the fringes of the bell curve of kinetic energy distribution that are damaging your circuit,