TY - JOUR ID - TI - Make a Dual Variable DC Power Supply AU - Raid A. Ismail AU - Mohammead Ghaffar Faraj AU - Sabah M. Abu-khumra PY - 2009 VL - IS - 3 SP - 513 EP - 531 JO - Journal of College of Education مجلة كلية التربية SN - 18130380 AB - A variable DC power supply is one of the most useful toolson the electronics'una tt""itics Laboratories 'The circuit issimple, reliable, urJ ,non lToof.'Well suited to supply thecir"uits in the experiments in its voltage range'In nsual companies it produce a single variable DC powersupply where it proriatt oniy u Variable positive 1o]!Se'While;;;;;*"t ,uppiy in this research provides a variable negativeanO positi". rottug", and hence we cirn rlse it in rnany cases'

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