TY - JOUR
AU - McHale, Maureen
AB - A method for adding electronic stopwatch capabilities to a calculator is described. An integrated circuit (NE555) is used for a time base. The circuit drives an opto-isolator or light-emitting diode that operates a photocell. The opto-isolator or photocell substitutes for a switch closure to increment the calculator in .10-sec intervals.
TI - Converting an electronic calculator into a combination stopwatch-calculator
JF - Behavior Research Methods
DO - 10.3758/BF03201631
DA - 2010-12-30
UR - https://www.deepdyve.com/lp/springer-journals/converting-an-electronic-calculator-into-a-combination-stopwatch-qlLPlQmnHc
SP - 549
EP - 551
VL - 7
IS - 6
DP - DeepDyve
ER -