Hey guys,
I need to determine which wires of an old house (cloth insulation, no safety ground) are 'hot' and neutral. I figured I'd have to build a rectifier/filter arrangement and use an LED with a 10K resistor to operate at 120V. It's a pain (need higher rated cap than rat shack carries...). I tried using just a power rect. diode to cut the AC to rippling DC, but no dice, the LED still glows.
Any suggestions for a simple circuit to accomplish this? Just making sure some outlets are wired correctly with respect to hot and neutral. Down the line safety grounds have to be added.
Suppose I could get an outlet tester and just mate it to one of those adapters with the ground screw tab not connected....it'll show no ground but would indicate hot/neutral reversed....
Thanks!
I need to determine which wires of an old house (cloth insulation, no safety ground) are 'hot' and neutral. I figured I'd have to build a rectifier/filter arrangement and use an LED with a 10K resistor to operate at 120V. It's a pain (need higher rated cap than rat shack carries...). I tried using just a power rect. diode to cut the AC to rippling DC, but no dice, the LED still glows.
Any suggestions for a simple circuit to accomplish this? Just making sure some outlets are wired correctly with respect to hot and neutral. Down the line safety grounds have to be added.
Suppose I could get an outlet tester and just mate it to one of those adapters with the ground screw tab not connected....it'll show no ground but would indicate hot/neutral reversed....
Thanks!