My Compaqt solution
#16
Sadly this box of 3mm water clear leds didn't come with forward voltage ratings ...so I could just use the "typical" ratings ...or try and set up a breadboard to ascertain them ..
Typical for R G B would be 1.8v  , 2.2v and 2.8v ...
but how accurate this is I have no idea ?
would you recommend an exact calculation Jim ..or do you think this would be 'close enough'
rgds
VS
..so doing the calculations and assuming the typical forward voltages for this type of 3mm coloured led
..gives me :-
Red - 300 ohm
green - 220 ohm
blue - 100 ohm

blue being the closest to the original resistance
but short of knowing for sure what the forward voltages of these leds are...pure guesswork.
They are all close-ish ..but left as is theoretically they would glow similarly or a bit dimmer passing less current in the case of red and green that is.
Reply


Messages In This Thread
My Compaqt solution - by Vipersan - 08-04-2019, 11:16 AM
RE: My Compaqt solution - by admin - 08-04-2019, 09:21 PM
RE: My Compaqt solution - by Vipersan - 08-05-2019, 02:11 AM
RE: My Compaqt solution - by admin - 08-05-2019, 07:23 PM
RE: My Compaqt solution - by Vipersan - 08-06-2019, 01:43 AM
RE: My Compaqt solution - by Vipersan - 08-06-2019, 03:17 AM
RE: My Compaqt solution - by admin - 08-06-2019, 09:47 AM
RE: My Compaqt solution - by Vipersan - 08-06-2019, 10:04 AM
RE: My Compaqt solution - by admin - 08-06-2019, 11:18 AM
RE: My Compaqt solution - by Vipersan - 08-06-2019, 12:28 PM
RE: My Compaqt solution - by Vipersan - 08-06-2019, 02:39 PM
RE: My Compaqt solution - by admin - 08-06-2019, 11:34 PM
RE: My Compaqt solution - by Vipersan - 08-07-2019, 12:38 AM
RE: My Compaqt solution - by admin - 08-07-2019, 08:57 AM
RE: My Compaqt solution - by Vipersan - 08-07-2019, 09:02 AM
RE: My Compaqt solution - by Vipersan - 08-07-2019, 09:45 AM
RE: My Compaqt solution - by admin - 08-07-2019, 04:34 PM
RE: My Compaqt solution - by Vipersan - 08-08-2019, 12:29 AM
RE: My Compaqt solution - by Vipersan - 08-08-2019, 07:52 AM
RE: My Compaqt solution - by admin - 08-08-2019, 08:00 AM
RE: My Compaqt solution - by Vipersan - 08-08-2019, 08:01 AM
RE: My Compaqt solution - by Vipersan - 08-09-2019, 02:50 PM
RE: My Compaqt solution - by admin - 08-09-2019, 04:17 PM
RE: My Compaqt solution - by Vipersan - 08-10-2019, 03:29 AM
RE: My Compaqt solution - by natevw - 02-05-2020, 10:42 PM
RE: My Compaqt solution - by Vipersan - 02-26-2020, 05:38 AM



Users browsing this thread: 1 Guest(s)