A
Abstract Dissonance
- Jan 1, 1970
- 0
I'm working on making a power supply that supplies different fixed regulated
voltages and also a + and - variable voltage (actually all the
configurations I will have are +5, +8, +12, +15, +15 and +24 along with a +
and - variable from 0 to 20 volts).
Now, I also plan on using an LCD to display the voltages and currents for
each(but using one 24x1 LCD).
My question is how can I control for automatic "resolution" for the voltage
meter? like I can use a fet(or maybe an op amp) to detect the voltage but I
need some kinda variable resistor that I can controll with my
microprocessor(which has build in 10bit ADC). I know there are ways to do
this but I'm not exactly sure what I need... I'd like 4 places of accuracy
from uA and mV to A(1.5A max) and V's(25V max).
I also have a fan in my case and I'd like to controll it depending on the
temperature... what device will return the temperature in the case that I
can use with my MCU to control the fan current?
Last thing I'm not to sure on is where to place my on off switch in the
circuit.
right now I have mains->fuse->varistor->filtering->switch->transformer but
it seems that I would want the switch right after the fuse?
Thanks,
Jon
voltages and also a + and - variable voltage (actually all the
configurations I will have are +5, +8, +12, +15, +15 and +24 along with a +
and - variable from 0 to 20 volts).
Now, I also plan on using an LCD to display the voltages and currents for
each(but using one 24x1 LCD).
My question is how can I control for automatic "resolution" for the voltage
meter? like I can use a fet(or maybe an op amp) to detect the voltage but I
need some kinda variable resistor that I can controll with my
microprocessor(which has build in 10bit ADC). I know there are ways to do
this but I'm not exactly sure what I need... I'd like 4 places of accuracy
from uA and mV to A(1.5A max) and V's(25V max).
I also have a fan in my case and I'd like to controll it depending on the
temperature... what device will return the temperature in the case that I
can use with my MCU to control the fan current?
Last thing I'm not to sure on is where to place my on off switch in the
circuit.
right now I have mains->fuse->varistor->filtering->switch->transformer but
it seems that I would want the switch right after the fuse?
Thanks,
Jon