basically a transistor will allow a 'higher' voltage/current pass through it (to the target device)....(unaffected..ie: not regulated or anything)... by allowing a 'smaller' voltage/current to 'toggle' the gate and allow said 'flow'...correct?
(Vcbo) Collector Base = 50v(Vceo) Collector Emitter = 45v(Vebo) Emitter Base = 5vDoes that mean it can have up to 50v connected (from battery/source)... output up to 45v to the 'target' device..and can take 'up to' 5v (max) to toggle/control the gate?
Im also confused about the current ratings given.. it is 200mA available or 500mA available? what are the difference between the two numbers given?(Ic) Collector Current = 500mA(Ibm) Peak Base Current = 200mA
basically jumper/bridge from the battery +/- pads from the first pcb to the second..... but more importantly.. could I use the same PWM pin to control/fade BOTH pcb's at the same time??
my question is.. if the one resistor I use, limits the current to, say, ...40mA going to the 5050 led/unit... how will the leds respond/behave?Will all 3 leds split the '40mA' equally? will one leds take more? or full mA leaving the others without full or equal current?
in the current example. if I changed to 5050 leds.. there are 5 leds.. going to all 5 x 5050 leds would be (5 x 60mA = 300mA) neded per pcb/board!!Im not even sure the transistor can handle/provide that?.. however if @ 40mA each 5050 led looks and acts fine.. it might be a viable option... (or maybe just more 1206 leds!) lol.. but I 'am' curious.
3.3v regulator is too low? because of the drop across it?I though ta 3.3v regulator put 'out' a 3.3v stream....no?wouldnt that be enough to power a 3.0-3.3fV led?most blue/green leds "I" have currently run at around there... your saying If I now the battery source/voltage when I populate I dont need a regulator.. because your saying.. just sue the correct resistor? even its a 7.4v battery cutting it down to 3.3v/20mA... still 'ok' to do?
1.) to add or not to add a vReg.. (seems like maybe NOT?)2.) I cant use a 3.3 (actually I think li-ion single cell are 3.7v...but whatever)..not enough to go through the transistor? what is the minimum needed? 5v?
maybe Im over thinking it? leave it alone.. just use a transistor.. and adjust the resistor(s) to reflect whatever battery pack is used?
I'd go with FET with low Rds, otherwise have ~0.7V across the BJT transistor.