Vol. XIII Motion sensors on Shabbos July 1, 2015 admin Download links: A is full, b is brochure HALOCHOSCOPE XIII36A.pdf HALOCHOSCOPE XIII36b.pdf
Vol. XVI gentile opening electromagnetic locks for Jew on Shabbos/Yomtov part I June 10, 2015 admin Download links: A is full b is brochure HALOCHOSCOPE XVI21b.pdf HALOCHOSCOPE XVI21A.pdf
