var fDesc=new Array(); fDesc[0] = "Digital Challenge consists of twelve activities to assist teaching basic digital circuit concepts. Virtual breadboarding of simple digital circuits is included.
The activities are designed to supplement classroom lecture, textbook lessons, and laboratory exercises.

Exercise Topics: Binary Counting, Octal Counting, Hexadecimal Counting, Hex-Octal-Binary Conversions, Binary-Decimal-BCD Conversions, Binary Addition, Binary Subtraction, Simple Gates, More Complex Gates, Name That Gate! One and Two, Truth Tables, Logic Simplification, Digital Integrated Circuits, Breadboarding Circuits, Type D Flip-Flops, Type JK Flip-Flops.

Main Features :
- Each use of an activity has new component values and parameters assigned.
- Student responses are scored and corrected immediately.
- Grades can be recorded on diskettes or printed on a certificate.
- Ends homework grading
- Works with any textbook"; function tShowHide(id, show) { var s = document.getElementById("desc"); if ((s.innerHTML.length<=212 || show==1) && show!=2) { s.innerHTML = fDesc[id]; if (document.getElementById('m1')) document.getElementById('m1').style.display='none'; if (document.getElementById('m2')) document.getElementById('m2').style.display='none'; if (document.getElementById('more_txt')) document.getElementById('more_txt').style.display='inline'; } else { s.innerHTML = ''; } }