Simple AC Circuits Simulation 
This application shows a simple circuit consisting of an alternating voltage source and, depending on the selected radio button, a resistor (without inductivity), a capacitor or an ideal coil (without resistance). In addition there are meters for the voltage V (blue) and the amperage I (red). 

555 IC Timer Monostable and Astable Design Calculator 
555 IC Timer Monostable and Astable Design Calculator. The 555 timer IC integrated circuit is the first and still one f the most popular IC timer chips in use. This timer IC operates as a oneshot timer or as n astable multivibrator. The 556 IC is a two 55 circuit chip. 

Schmitt Trigger Equations and Calculator 
The following equation and calculator gives values for Schmitt Trigger and an Inverting Schmitt Trigger. A Schmitt trigger is a comparator circuit with hysteresis, implemented by applying positive feedback to the noninverting input of a comparator or differential amplifier. 

Potentiometer Equation and Calculator 
otentiometer Equation and Calculator. A potentiometer or a resistor a pot, is a threeterminal resistor with a sliding or rotating contact that forms an adjustable voltage divider. If only two terminals are used, one end and the wiper, it acts as a variable resistor or rheostat. 

Ohms Law Equation and Calculator 
Equation and Calculator Ohms Law. Ohm's law states that the current through a conductor between two points is directly proportional to the potential difference across the two points. 

