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Another question about current sense

I apologize in advance if this is a repeat question (which it probably is.)

Is there a difference between "local control" and "current sense" ?

Many years ago I needed to modify an appliance module and I used Ido Bartana's mod of clipping diode D10. But now I see all of these mods for clipping pin7 or cutting a jumper.

Are both mods needed? Or is one for one type of module and the other for another type?

I want to modify some lamp modules now.

Unfortunately I have not been following the latest hacks over the years. My house has actually been working great for the past few years. (With the exception of my branch circuit filter not stopping the line noise from the furnace.)

Reply to
raymondjiii
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Current sensing is P/O local control. Cutting the jumper disables Local Control but does not stop the current leakage through the load to detect the local switch changing state. The leakage is what keeps LED bulbs lit and CFL bulbs flickering. On older modules cutting the diode stopped the leakage current (and by default Local Control) but I do not know if this still works on newer modules. I think Ido's information is still the best around.

Reply to
D&SW

Reply to
raymondjiii

Technically one mod, the jumer cut, defeats Local Control. The other mod, the diode cut, stops the leakage current. However if you cut the diode but not the jumper on pin 7 of the chip, pin 7 (a high impedance input) remains connected to a half dozen components, which are now electrically "floating". That doesn't make "happy time" for the pin 7 input. Some modules become unstable. Some may work fine.

Reply to
D&SW

I guess I should verify what "local control" means. Does it mean if the module was plugged into a switchable wall outlet. Vs - current sense allows you to turn on the applicance/light from the appliance's built-in switch?

Reply to
raymondjiii

Local Control IS the capability of controlling the light / appliance at the units switch. Current sensing through the load is the way "local control" senses the table lamp / appliance has been turned OFF-then back ON for the local control function.

Plugging an X10 module into a switched wall outlet is redundant. Doesn't make much sense to do it unless you leave the switch to the outlet ON all the time. If you are asking if a module will turn ON when the switch controlling the outlet the module is plugged in to is turned ON, the answer is no.

Reply to
D&SW

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