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Electricity on Shabbat: Difference between revisions

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# It is forbidden to speak into a tape recorder even if the recorder was turned on before [[Shabbat]]. <ref>Menuchat Ahava 24:13, Yechave Da'at 2:57. Igrot Moshe OC 3:55 forbade recording a shiur on Shabbat or the like since speaking into it might cause the voltage to increase in the circuit and also it might be considered molid to have something new introduced into the memory of the recorder.</ref>
# It is forbidden to speak into a tape recorder even if the recorder was turned on before [[Shabbat]]. <ref>Menuchat Ahava 24:13, Yechave Da'at 2:57. Igrot Moshe OC 3:55 forbade recording a shiur on Shabbat or the like since speaking into it might cause the voltage to increase in the circuit and also it might be considered molid to have something new introduced into the memory of the recorder.</ref>
===Electric Blanket===
===Electric Blanket===
# It is permitted to use an electric blanket on [[shabbat]], provided one does not move the knob that adjusts it.  It is proper to place scotch tape on top of the knob in order to prevent oneself from accidentally adjusting the blanket on [[shabbat]]. <ref> Igrot Moshe 3.50, Menuchat Ahava 1.24.37, Yechave Da'at 2.49 </ref>
# It is permitted to use an electric blanket on [[shabbat]], provided one does not move the knob that adjusts it.  It is proper to place scotch tape on top of the knob in order to prevent oneself from accidentally adjusting the blanket on [[shabbat]]. <ref> Igrot Moshe 3:50, Menuchat Ahava 1:24:37, Yechave Da'at 2:49 </ref> Note this only applies to the older electric blankets that work when plugged in but not ones which are responsive to sensing a person's presence are forbidden.
 
===Automatic Doors, Doorbells, and Door Chimes===
===Automatic Doors, Doorbells, and Door Chimes===
# It is forbidden to enter an automatic electric door which opens with a motion sensor unless there is a need to enter a hospital with an electric door for the needs of a patient who is in a life threatening situation. <ref>Shemirat Shabbat Khilchata 40:19</ref>  
# It is forbidden to enter an automatic electric door which opens with a motion sensor unless there is a need to enter a hospital with an electric door for the needs of a patient who is in a life threatening situation. <ref>Shemirat Shabbat Khilchata 40:19</ref>