Bri's worldelectronics, programming and more

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Electronic Calculator

Resistance Compositor
Resistance Compositor screenshot
Search two resistors in series or parallel as a more accurate replacement for a single resistor.
Active Lowpass
Active Lowpass screenshot
Calculates the parts for a second order active lowpass filter.
Non-inverting Schmitt Trigger
Non-inverting Schmitt Trigger screenshot
Calculates the parts for a non-inverting Schmitt Trigger.
Adjustable voltage divider
Adjustable voltage divider screenshot
Calculates the resistors for a voltage divider for a given voltage output range.
Adjustable voltage regulator LM317
Adjustable voltage regulator LM317 screenshot
Calculates the resistor for a LM317 voltage regulator.

Microcontrollers

AVR gcc C/C++ toolchain
AVR gcc C/C++ toolchain screenshot
AVR gcc C/C++ toolchain debian packge and build script.
ARM gcc C/C++ toolchain
ARM gcc C/C++ toolchain screenshot
ARM gcc C/C++ toolchain debian packge and build script for ARM9 and Cortex M4.
AVR Burn-O-Mat
AVR Burn-O-Mat screenshot
GUI for avrdude written in Java for Linux and Windows.
USBprog firmware
USBprog firmware screenshot
USBprog firmware download workaround.
AVR ISP OpenOCD (FT2232)
AVR ISP OpenOCD (FT2232) screenshot
OpenOCD (FT2232) USB Adapter as AVR ISP Adapter.
Resistor DAC
Resistor DAC screenshot
DAC built of discrete resistors with a load at output.
PWM and sine tables
PWM and sine tables screenshot
Create PWM and sine tables.
LED Leucht-O-Mat
LED Leucht-O-Mat screenshot
High-end LED fairy lights (each LED can be controlled independently).

Control theory

Control path simulation
Control path simulation screenshot
Control path step response simulation.
Control path simulation formula
Control path simulation formula screenshot
Control path step response simulation with transfer function.
Control loop simulation
Control loop simulation screenshot
Control loop step response simulation.
PID controller tuning by iteration
PID controller tuning by iteration screenshot
Control loop PID controller parameter tuning using iterative algorithm.
PID controller tuning by step response
PID controller tuning by step response screenshot
PID controller tuning using control path step response to estimate the parameters.
PID controller tuning by oscillation
PID controller tuning by oscillation screenshot
PID controller tuning using stimulated control path oscillation to estimate the parameters. (relay method)
Estimate control path parameters
Estimate control path parameters screenshot
Control path parameter estimation with differential evolution.
Numeric Laplace Transformation inversion
Numeric Laplace Transformation inversion screenshot
Numeric laplace transform inversion for control theory applications.

Playing around with mathematics

Fractal Mandelbrot and Julia set
Fractal Mandelbrot and Julia set screenshot
How to draw Mandlebrot and Julia set.

Primary school excercises

Math Plus Minus
Math Plus Minus screenshot
Math practice for addition and subtraction.
Mathe Multiplication
Mathe Multiplication screenshot
Math practice for multiplication.
Addition and Subtraction with large numbers
Addition and Subtraction with large numbers screenshot
Math practice for addition and subtraction with large numbers.

Programming

Word list
Word list screenshot
Free german and english word list.
Lua-Quick-Try-Out
Lua-Quick-Try-Out screenshot
A tiny Lua IDE and debugger for Linux and Windows.
Java Applets
Java Applets screenshot
Some nice java applets. Mostly useless.

Miscellaneous

Photos
Photos screenshot
My favorite photos.
Gigaset SE515
Gigaset SE515 screenshot
Modified firmware for Siemens Gigaset SE515 with SSH admin login.

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