Conectar altofalante diretamente no microfone
Things You Can Do With Old Phones
The simplest FM transmitter... Without coil/inductor
Practical Guide to LEDs 1 - Pick your LED!
How to Make a simple 12v to 220v DC to AC power inverter
How to Make a simple 12v to 220v DC to AC power inverter (Video)
Relays (DC): 99.9% Less Power & Latching Option
Live Reverse Engineering WiFi Modules
How to salvage a DVD Drive For Free Parts
Turn An Old Cell Phone Into A Smartwatch
Resistor Allows Multiplexing Of Microcontroller I/O Lines
Sensor Pushbutton with Darlington Pair
Fixing a Monitor With a Breadmaker: AKA Don't Throw It Out!
Motor de HD com Arduino - Parte 1
Motor de HD com Arduino - Parte 2
DC Motors Tutorial-3/3: Steppers
Arduino : How to Control a Stepper Motor With Potentiometer
Uso de Motor de Passo com Correia Dentada
Adaptação do motor de passo a uma barra rosqueada.
How to use a servo motor, pulse width modulation (PWM) | Arduino Tutorial
Servo Signals and Characterization
Design and implementation of an impedance analyzer based on Arduino Uno
Vídeo - Impedância (Khan Academy)
Designing of a variable frequency standalone impedance analyzer for in vitro biological applications
Development of low Cost Portable Platform for Bioimpedance Based Diagnostics
Basics of Electrochemical Impedance Spectroscopy
AN INTUITIVE LOOK AT Electrochemical Impedance Spectroscopy (EIS)
How Do Operational Amplifiers Operate?
Curso sobre Amplificadores Operacionais
Op Amp Applications Handbook, 2005
EEVblog #600 - OpAmps Tutorial - What is an Operational Amplifier?
Animação didática sobre o funcionamento dos Amplificadores Operacionais
A compendium of blog posts on op amp design topics
Tales From the Chip: LM386 Audio Amplifier
The Evolution of the Instrumentation Amplifier
Understanding an Instrument Amplifier's Linear Operating Range
Digitally Programmable Amplifier Meets Sensor Gain, Ranging Needs
What's All This Transimpedance Amplifier Stuff, Anyhow? (Part 1)