These tools will assist you in building electronic circuits.

 Calculators 555 Timer Calculator (Astable Mode)Will give you the timing values for the 555 timer such as frequency and duty cycle calculator. Capacitor Impedance CalculatorCalculate the impedance of a capacitor. LM317 CalculatorFind the value of the voltage adjustment resistor required to set the output of an LM317. Ohms Law CalculatorCalculate for current, voltage, resistance, and power. Resistance Values CalculatorSimple check to verify if the calculated resistance. Thermistor Resistance CalculatorSimple check to verify if the calculated resistance. LED Series Resistance CalculatorDetermines the ideal series resistor value for powering LEDs LM317 Regulator Calculator V2Determines the Resistor value for a LM317 regulator IC555 Type1 Astable Timer Calculator V1.0 Calculates the Frequency and Period of a 555 Type1 Astable Timer Circuit. IC555 Type2 Astable Timer Calculator V1.0 Calculates the Frequency and Period of a 555 Type2 Astable 50/50 Mark/Space Timer Circuit. IC555 Monostable Timer Calculator V1.0 Calculates the High Output Period of a 555 Monostable Timer Circuit. LM3914 Calculator V2 Calculates the LM3914 Circuit Components. LM3915 Calculator V2 Calculates the LM3915 Circuit Components. Calculator for PSU's using Rectifier, Smoothing Capacitor and a Regulator. V2 Enables the User to see the effect of different component Values. Thermistor versus Temperature Plot. V2 Enables the user to see the changes in Thermistor Resistance due Temperature.

 Cheat Sheets Resistor Color CodeA chart to help you work out a resister's value.
 Quiz Sheets Quiz V0.0 Template Trials Quiz Template Trials, NOT a Quiz!. Quiz V1.0 General Electronic and Electrical , 10 Questions A 10 Question Quiz, Beginner. Quiz V2.0 Common Engineering Abbreviations, 10 QuestionsA 10 Question Quiz, Beginners Level. Quiz V3.0 Electronics and Electrical, 10 QuestionsA 10 Question Quiz, Intermediate. Quiz V4.0 Computer History. 10 QuestionsA 10 Question Quiz, Intermediate Level. Quiz V5.0 C. Programming Language. 10 QuestionsA 10 Question Quiz, Intermediate Level. Quiz V6.0 Electronic and Radio. 10 QuestionsA 10 Question Quiz, Intermediate Level. Quiz V7.0 Electronic and Electrical, Intermediate. 10 QuestionsA 10 Question Quiz, Intermediate Level. Quiz V8.0 Resistor and Zener Voltage Dividers.A 10 Question Quiz, Beginner Level. Quiz V9.0 Resistor Networks.A 10 Question Quiz, Beginner Level. Quiz V10.0 Transistor/FET.A 10 Question Quiz, Beginner Level.