P
PDRUNEN
- Jan 1, 1970
- 0
Hi Group:
Looking for suggestions:
1: I have a light bulb load can be as low as 60 watts or as high as 600 watts.
The power source is the AC main at 120 Vrms 60Hz. I don't require knowing the
exact current, only if some current is being carried to the load.
I need to detect if circuit has current flow and these are some of the ways I
have approched.
1: low value current sense resistor into a comparator.
2: current-xformer: Very expensive and large.
3: Heating of the PCB trace carrying the current (maybe hard to determine for
all cases if the switch is outside in the cold etc.
Is there a hall-effect method or other method? IR sensor?
Must be something cheap and simple. So far only method one appears cheap and
simple.
Thanks Group!!!
Paul
Looking for suggestions:
1: I have a light bulb load can be as low as 60 watts or as high as 600 watts.
The power source is the AC main at 120 Vrms 60Hz. I don't require knowing the
exact current, only if some current is being carried to the load.
I need to detect if circuit has current flow and these are some of the ways I
have approched.
1: low value current sense resistor into a comparator.
2: current-xformer: Very expensive and large.
3: Heating of the PCB trace carrying the current (maybe hard to determine for
all cases if the switch is outside in the cold etc.
Is there a hall-effect method or other method? IR sensor?
Must be something cheap and simple. So far only method one appears cheap and
simple.
Thanks Group!!!
Paul