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Electricity on Shabbat: Difference between revisions
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# It is permitted before Shabbat to set a timer for lights or other electric appliances to go on or off on Shabbat.<ref>Sh"t Maharam Shik 157, Chazon Ish 38:2, Shemirat Shabbat KeHilchata 13:26, Menuchat Ahava 24:30, Sh"t Yabea Omer 3:17 </ref> | # It is permitted before Shabbat to set a timer for lights or other electric appliances to go on or off on Shabbat.<ref>Sh"t Maharam Shik 157, Chazon Ish 38:2, Shemirat Shabbat KeHilchata 13:26, Menuchat Ahava 24:30, Sh"t Yabea Omer 3:17 </ref> | ||
# One may set an alarm clock before Shabbat even though it will make noise on Shabbat. <ref>The Shabbos Home (Rabbi Simcha Cohen, vol 2, pg 537) and Sh"t Maharshag YD 1:7(2) permit. However, Sh"t Igrot Moshe 4:70(4) only permits if it is not heard outside his personal room. See Shemirat Shabbat KeHilchata 28:29 (and 28:30 in new edition) who permits before Shabbat for mitzvah purposes setting a mechanical alarm clock that involves removing a pin (see there). </ref> See [[Making music on Shabbat]]. | # One may set an alarm clock before Shabbat even though it will make noise on Shabbat. <ref>The Shabbos Home (Rabbi Simcha Cohen, vol 2, pg 537) and Sh"t Maharshag YD 1:7(2) permit. However, Sh"t Igrot Moshe 4:70(4) only permits if it is not heard outside his personal room. See Shemirat Shabbat KeHilchata 28:29 (and 28:30 in new edition) who permits before Shabbat for mitzvah purposes setting a mechanical alarm clock that involves removing a pin (see there). </ref> See [[Making music on Shabbat]]. | ||
# Some forbid leaving a digital photo frame which presents a slideshow of pictures set from before Shabbat to continue during Shabbat. <ref>[http://www.ou.org/webcast_kosher Rav Hershel Schachter] (OU Kosher Webcast, 2011, min 16-8) </ref> | |||
==Sending email on Friday== | ==Sending email on Friday== | ||
# Strictly speaking it is permissible to send an email from America to Israel on Friday afternoon when it is already Shabbat in Israel but it's praiseworthy to avoid it. <ref> [http://www.ou.org/webcast_kosher Rav Hershel Schachter] (OU Kosher Webcast, 2011, min 9-13) </ref> | # Strictly speaking it is permissible to send an email from America to Israel on Friday afternoon when it is already Shabbat in Israel but it's praiseworthy to avoid it. <ref> [http://www.ou.org/webcast_kosher Rav Hershel Schachter] (OU Kosher Webcast, 2011, min 9-13) </ref> | ||
