ELECTRICAL & ELECTRONICS
ASTABLE MULTIVIBRATOR AND ELECTRONIC SWITCH
This board incorporates two of the units specified in the 'A' level list of requirements. Both functions being performed by a quad 2 input NOR integrated circuit. The astable multivibrator frequency may be varied over the range of about 0.5Hz to 500Hz, its output being taken to both an external output socket and an L.E.D. Indicator via buffer transistor. The electronic switch may be used to provide an output which is high or low with a 'bouncefree' action. It has a buffered LED indicator in addition to its output termination.
BELLSTONE HI-TECH INTERNATIONAL