whew... thats alot to take in at once.
lets see if I have things correct in what Im being asked to do:
@SirNickity-
first thanks for taking the time to go over the board layout and datasheet for the transistors.. (glad I'm not crazy and that it looks to be set-up/designed correctly)
ok....
1.) keep batery/power to the PCB.. disconnect the Arduino signal/control lines)
*(what do you mean by GROUND the BASE onall transistors?)
meaning black probe on battery GND? and red probe on the BASE of each transistor? (or vice versa?)
** I connected RGB again.... powered it up.. same deal (RED led on)..
I take out the Arduino signal lines tot he PCB.. and each one (led) goes out.. when all Arduino lines OUT..LED is OFF.
2.) when I take RED prob, put it on Vcc (positive supply voltage).. and touch BLACK probe the BASE (pin 1) on the transistors..
- (actually I am touching it to the RIGHT side of the resistor, and not directly tot he BASE pin of the transistors)
Each of the leds light up respectively.. (not very bright or anything.. but about the same it did before)
(Im sure changing the 1K resistor values and the 3.9k > 3.9Ohm will help on this a bit though...right?)
3.) checking the RGB led with a PSU & meter doesnt seem show any signs of shorted LED?
@polymorph -
(trying to understand it all) I dont have any kind of DIODE setting? (but I could be missing it? not sure what it looks like?) I have a continuity setting?
1.) NOT POWERED
Red probe to BASE
Black probe to Emitter/Collector
Results:
755-756, (from 1),... on all 3 transistors.. at each Emitter & Collector
Reversed..
Black probe to BASE
Red probe to Emitter/Collector
Results:
1 (no change)... on all 3 transistors.. at each Emitter & Collector
2.) "I meant for you to measure those voltages with reference to Ground, aka common. So put the black lead on the Arduino ground and use the red lead to measure voltages on the transistor base and collector terminals."
I will do this again.. but I wanted to ask.. if ann GNDS are connected isnt that the same thing?
I have battery pack connected to Arduino.. and battery pack also connected to breadboard coming from same point/wire..
anyways.. tapping one of the GND pads on the Arduino... (Black probe)
and testing the BASE & COLLECTOR pins on each transistor:
1.) Base-
T3: 0.77v
T2: 0.77v
T1: 0.77v
when fired.. the 'active' pin drops to: 0.067v
2.) Collector-
T3: 0.03v
T2: 0.03v
T1: 0.03v
when fired.... NO CHANGE
Thanks guys...
Im hoping to finally solve this (one way or another) and but this rest today.. either order more parts.. fix whatever it is Im doing wrong.. or something.
swapping out the resistors now..
I'll check back in a few after the surgery is done.