Mathematics 

ADC Scaler  Quickly convert raw ADC readings to easily codable integers, utility in calculators. 
Compounded interest  Formulas to calculate payments for various types of loans with background information. 
Conversion Calculator  Pretty good conversion calculator 
Inductance (JPG)  Calculation for Inductance < > Turns for a well coulpled flux 
Luhn Algorithm  Generator/Checker code for Luhn check digits. This is how the MEID check digits are computed 
PID1,
PID2,
PID3 Microchip Example (Code) 
ProportionalIntegralDerivative control theory introduction and Microchip example for controlling an inverted pendulum 
Prefixes  Multiples and submultiples of units (Prefixes) 
Public Key Encryption  Public key encryption: I encode with MyKey+YourKey, you decode with YourKey. 
SHA1 Simple Digester VBSource CryptoAttack 
This algorithm converts a
document from 0 to (2^{64}1) bytes to a 160 byte digest.
The simple digester is the stand alone VB applet. See also Calculators in Utilities. Slavasoft makes a nice hashing program for many algorithms. 
SPC 1, SPC 2  Northern Analytical articles on SPC (Statistical Process Control) 
Standard Deviation  Computational method for Standard Deviation 
TEA/XTEA XTEA 
Description of the
"Small encryption
algorithm" bidirectional cypher for embedded systems Code and test vectors for XTEA bidirectional cypher. See also Calculators in Utilities 
TEA crack  Cryptanalysis of the TEA algorithm 
Trig: Circular functions  Chapter on the six fundamental circular functions 
Trig: Formula card  Lots of info on trigonometry relationships; triangle and unit circle, most of these are now here. 
Trig Notes  My own formula notes from Math104 = Analytic trigonometry. 
Trig: Unit circle  Randians, degrees and (x,y) coordinates of special angles in unit circle, also found here. 
Unit Conversion  Convert from between measurement systems (Integrated into Calculators, V1.026+) 
Any questions or comments?
This page last updated on
August 05, 2010