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6 votes
Accepted

Use of an automatic toilet on Shabbos?

Halachipedia brings a number of opinions permitting this R Josh Flug (Sukkot To Go 5770, p. 27) writes that it is certainly permissible to use a toilet with an automatic flusher if no other ...
mbloch's user avatar
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5 votes
Accepted

Source for electricity in the times of the Talmud?

The story you are looking for is about the Tosafist Rabbi Yechiel of Paris. From a quick search it seems like the source is from Éliphas Lévi in his book Histoire de la magie, (The History of Magic), ...
simyou's user avatar
  • 1,837
5 votes
Accepted

Bishul Akum with Electricity

This exact view is cited here in his name. The reason given is that the action of "lighting" such an oven only sends a short pulse to activate the electric heat, but the electricity which ...
רבות מחשבות's user avatar
4 votes
Accepted

Who is worried about affecting a refrigerator's thermostat on shabbat?

R Howard Jachter wrote here a long article on the topic -- find a summary below with light edits. To immediately answer the question of those who rule more strictly he cites R Tzvi Pesach Frank, R ...
mbloch's user avatar
  • 53.1k
4 votes

Audio Recording on Shabbat/Yom Tov

Recording on shabbat is linked to use of microphones on Shabbat (since you require microphones to record). It might be in this context that you heard R Shlomo Zalman Auerbach (RSZA) being quoted since ...
mbloch's user avatar
  • 53.1k
3 votes

Source for electricity in the times of the Talmud?

Adding to what @simyou wrote, Éliphas Lévi likely read the story in Giulio Bartolucci's bio-bibliographical work "Bibliotheca Magna Rabbinica", vol. 3, pp. 833-835, where he brings a Latin ...
Harel13's user avatar
  • 25.9k
3 votes

Using modern electronic devices (refrigerators, air conditioners, digital water meters) on Shabbat

The disagreement with these devices(disregarding light bulbs in fridges or fans in ovens, at the moment) is whether grama or pesik reisha d'lo neicha lei are permitted on shabbat; assuming we accept ...
chacham Nisan's user avatar
3 votes

Air purifier with LED sensor on Shabbat

Rav Nachum Rabinovitch, shlit"a, (who holds electricity is only, at worst, an issue of uvda d'chol [weekday activity] has ruled allowing the use of hotel key cards even when they trigger an LED (see ...
Loewian's user avatar
  • 17.8k
2 votes

Audio Recording on Shabbat/Yom Tov

It is forbidden to speak into a tape recorder even if the recorder was turned on before Shabbat Igrot Moshe OC 3:55 forbade recording a shiur on Shabbat or the like since speaking into it might ...
aBochur's user avatar
  • 3,869
2 votes

Can one disconnect an emergency lamp from power on shabbat?

Most agree that the emergency torch is a keli shemelachto le'issur (a utensil with a prohibited use). Such a utensil can be moved for its own use or to liberate the space it occupies. (see here and ...
Avrohom Yitzchok's user avatar
2 votes

Is a Highwire Eruv allowed?

The Mishna Berurah here 362 s.v. 64 quotes a number of tshuvos that discuss telegraph wires. He does not write what they say, but he does say see there, implying you should rule with those opinions. ...
user6591's user avatar
  • 33.8k
2 votes

Why is turning on a faucet not considered molid or boneh?

Pipes under your sink -even water is not flowing through them- is still a fully functional pipe (כלי), just as a cup without liquid in it is still a cup. But a broken circuit is just that a "...
yih613's user avatar
  • 542
2 votes

Why aren't Shabbat Lamps muktzeh?

From here written by Rabbi Doniel Neusdadt Question: On Shabbos, may an electric lamp be moved to another location so that the light will not disturb one’s sleep? Discussion: This should be avoided, ...
Moz's user avatar
  • 1,152
2 votes

Tweeting on Shabbat: d'oraita or d'rabbanan violation?

I will not deal with the issue you had with Safek Pikuach Nefesh as not enough details were given. I will deal mainly with the issues of Kosev relating to an electronic screen. The recent Poskim have ...
Moz's user avatar
  • 1,152
2 votes

Microphones on Shabbat

According to those who maintain that microphones are prohibited on Shabbat (see, e.g., Rabbi Yisrael Rosen's thorough summary of the views, cited by @mbloch here), it should still be permitted to "...
Loewian's user avatar
  • 17.8k
1 vote

Why aren't Shabbat Lamps muktzeh?

Some are lenient and in fact hold that LED lamps are not muktzeh at all. https://dinonline.org/2013/09/22/moving-led-flashlight-on-shabbos/
torahmike's user avatar
  • 675
1 vote

Why aren't Shabbat Lamps muktzeh?

One may move a utensil designated for a prohibited act, if it's with the intention to use it for something permissible (OC 308:3). Even if a lamp is completely Muktzeh, perhaps we can prove that it is ...
שלום's user avatar
  • 3,302
1 vote

Leaving a phone perpetually on on the Sabbath

I've heard the general reasoning that even though you may or may not be violating Shabbat, things should be abstained from in the spirit of Shabbat. In other words, if there's doubt about something ...
Ephraim77's user avatar
  • 1,512
1 vote

Leaving a phone perpetually on on the Sabbath

An argument could be made that any speaking is causing more electrical activity -- though likely this would be prohibited at either the rabbinic level or extra-serious-custom level; some amount of ...
Shalom's user avatar
  • 134k
1 vote

Shutting lights off during Chol Ha'moed, to save electricity

There are 5 categories of work permitted on Chol Hamoed (from this book on Chol Hamoed laws) Work needed for the festival (tzorech hamoed) Work needed to prepare food Work that must be done to ...
mbloch's user avatar
  • 53.1k
1 vote
Accepted

Is it permitted to turn off a time switch on Shabbos?

It seems to me that the question is very much alike the known discussion about whether it is permitted to open the refrigerator on Shabbat, when the majority of the possekim allow you to open the ...
Ian Trolles's user avatar
1 vote

Asking a non-Jew to turn off a light on Shabbat

In Rabbi Ribiat's "39 Melachos Book" (vol 1, pg 64)--cited in this Halachapedia.com footnote-- he rules that "one may not ask a non-Jew to shut the lights." As usual with these type of things, best ...
alicht's user avatar
  • 12.1k
1 vote

Can a "brain controlled" prosthetic be used on Shabbat?

There are two schools of thought on electricity in Shabbos. The Chazon Ish holds that closing a switch is boneh, building, and therefore a forbidden labor on Shabbos. Rav Auerbach argues that the ...
DrM's user avatar
  • 398
1 vote

Conductivity of living things and Shabbat

The body is not a good conductor of electricity, it would be considered an insulator. However, even with a high voltage you can pass electrical current through anything, this is called dielectric ...
bondonk's user avatar
  • 10.4k
1 vote

Being in a photo on Shabbos

I found in the book " Otzar Hatshuvos by Rabbi Abraham Scheinberg (great book, highly recommend)" a intresting question. The question was" a boy who was drafted in the army is asked to pose for a ...
sam's user avatar
  • 42.2k
1 vote

On Shabbos, may someone turn off a switch of an electric-eye controlled light while the light is off?

The following addresses the case where the switch controls only the power for the light. That is to say, the switch does not also turn off something in the electric eye circuit. The Chosen Ish holds ...
DrM's user avatar
  • 398
1 vote

Sewer pump usage on Shabbat

Rav Aryeh Leibowitz quotes the Nishmas Shabbos (6:75 - note this teshuva doesn't seem to be the correct address) saying that if the electric sewer pump will only be activated after a few flushes, then ...
NJM's user avatar
  • 14.3k
1 vote

Adjusting Potentiometer on Yom Tov (eg. oven temperature)

The situation is that the rheostat must be a continuous setting situation (analogous to a gas stove with the flame already on). If the dial causes the switch to click from one setting to another, then ...
sabbahillel's user avatar
  • 43.2k

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