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\shabbatphone instructions -eng.doc
ZOMET
is a non-profit, public service institute dedicated to
the solution of Halachic problems through the use of science and technology
1
Alon Shevut, Gush Etzion
90433,
Israel
Tel:
(02) 9931442
Fax:
(02) 9931889
zomet
@
netvision.net.il www.zomet.org.il
ZOMET
Shabbat-phone
A Phone for Shabbat intended for Vital Needs,
Capacitive Touch model
Halachik Background:
The Shabbat-phone is intended for medical, security and other essential needs,
even in situations that are clearly not life threatening (not even
safek pikuach
nefesh
). Closing an electrical circuit (such as a switch, button, etc.) is forbidden
on Shabbat, The Shabbat-phone has no regular on-off switch. We based the
Shabbat-phone technology on two halachik principles: modifying electric current
or frequency and
Gramma
. It's therefore permitted in these circumstances to use it
on Shabbat
Modifying electric current or frequency
– The phone keys are touch sensors
and use capacitive sensor technology. These sensors change the electrical current -
voltage - frequency, without opening or closing any circuit. Placing a human
finger on the key changes the current or frequency at that point. Special software
translates this change to the intended function of a key. Pressing a key with a
stick, for example, would not cause any response. Simply adjusting the level of
the electric current in these circumstances is permitted.
'Grama'
– the
Grama
switch or button has no electric voltage or current
connected to it, it's similar to a light switch on a wall with the Shabbat clock timer
turned off. An electronic circuit periodically scans this switch approximately
every 3 seconds. If the very brief periodic scanning finds that a switch or button
has changed state an operation will be executed after a few seconds. There is an
assurance that no activation will occur while the switch is being pressed.
Installation instructions:
1. Connect the phone line to the phone jack.
2. Connect the supplied AC adapter to an electrical outlet and to the phone.