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  Home > JCE Print > Journal of Chemical Education > Issues > 1998  > May  >
Chemistry Everyday for Everyone
Low Cost Science Teaching Equipment for Visually Impaired Children
H. O. Gupta and Rakshpal Singh
National Council of Educational Research and Training, Department of Computer Education and Technological Aids, Sri Aurobindo Marg, New Delhi 110016, INDIA
Cover
May 1998
Vol. 75 No. 5
p. 610
Abstract
A low cost null detector an electronic thermometer and a colorimeter have been designed and developed for enabling visually impaired children (VIC) to do experiments in science that normally are accessible only to sighted children. The instruments are based on audio null detection in a balanced bridge and use a themistor for sensing the temperature and an LDR for color change. The analog output can be tactually read by VIC. The equipment has been tested for suitability with VIC. The approach followed in developing these equipment would be generally appropriate to a wide variety of science equipment for VIC by incorporating suitable sensors.
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*  Citation
 Gupta, H. O.; Singh, Rakshpal. J. Chem. Educ. 1998 75 610.
*  Keywords
*  History
 Created:
Last Updated:		 June 23, 1999
June 23, 2005
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