betwixt said:
You can of course use a relay if that's what you want to do. Power it from the voltage from the bridge rectifier and switch it with another transistor to ground. Put a 4700 Ohm resistor n line with its base and drive it from the microprocessor. You will need to add a diode (1N4001 etc.) across the relay coil with the cathode end to the supply, anode end to the transistor. This will absorb the back voltage kick as the coil switches off.
There i was intend to use the relay....
Well, so again for sure...
The ckt will ctrl the output current to max 6A to min some mA right??and the Q3 is for that...
Well, so after the correction as you said, (relocating the 2400ohms), it is okey?? I mean did i redraw it properly now?? And about the 10uF cap between A-B (As told in datasheet)???it is required or i just can ommit it?
If I fail to get a 2400ohm, can I go with 2200?? And so for controlling 2 of the voltages as I said, i will bias the Q1,2 by ATMEL right??
Mishu~
Added after 2 minutes:
oppps, about relay, you were telling that so finally i can use total 3 pots for 3 diff voltage... one 14.6, 13.8 and 1.5 right??? or alternate is to use a relay as i told...
Added after 11 minutes:
hey, about the part of q3,
as per datasheet of 338, it says that
Vout = 1.25(1+R2/R1) and thus with the use of 2400, what happens??? can you please check this schematic I attached again for the location of 2400ohm?? and when .6v makes the Q3 conducts, then actually what happens?? I mean how it actually controls the current not flowing over 6A??? or it is shutting down when it sense I=6A??? If shuts down, then for a empty batt, i think it will never start... because hungry batt will try to eat even 10A. but if it limits the curr out, then fantastic. Whatever your hunger is, you have to eat that I feed...
Added after 20 seconds:
hey, about the part of q3,
as per datasheet of 338, it says that
Vout = 1.25(1+R2/R1) and thus with the use of 2400, what happens??? can you please check this schematic I attached again for the location of 2400ohm?? and when .6v makes the Q3 conducts, then actually what happens?? I mean how it actually controls the current not flowing over 6A??? or it is shutting down when it sense I=6A??? If shuts down, then for a empty batt, i think it will never start... because hungry batt will try to eat even 10A. but if it limits the curr out, then fantastic. Whatever your hunger is, you have to eat that I feed...
Added after 34 minutes:
opps.... agiain.... (Lots of questions.... huh...)
Can I also limit the current by using a Limiting resistor (around 5ohms, 5W) for limiting it to 5A??? just to know... (as i said, learning.... that never ends)