Prototypes

A prototype is an early sample, model, or release of a product built to test a concept or process or to act as a thing to be replicated or learned from.

Low-Cost Universal Dual Channel Audio Checking And Troubleshooting Tool

Frequently, we are in need to do audio troubleshooting of electrical and electronic components, installations and equipment. E.g. we may need to check, test and evaluate:microphones loudspeakers headphones audio filters preamplifiers the...

Measuring The Charging And The Discharging Current Of The Battery

Introduction When we work with rechargeable battery it is useful to have the following functions:* measuring the charging current * measuring the discharging current * measuring the voltage over the batteryBut in order to...

Multi-channel Hardware Driver for Embedded Systems

Introduction The real world embedded systems are controlling DC motors, step motors, electromagnetic relays, incandescent lamps, powerful LEDs, displays, inductors, transformers, long cables, etc.On the market we can find large variety of...

Simple Universal AC Or DC Amplifier with OPA452/OPA453 And Transistors

Introduction During the experiments with loudspeakers, systems with loudspeakers, transformers, public announcement systems, audio distribution lines and amplifies, etc, we are in need of audio amplifier capable of providing more than 60Vpp...

Wi-Fi Controlled Robot Using Arduino UNO And Blynk

Control your Robot from anywhere using the ARMA IoT shield for UNO and the Blynk App which provides the user interface.Overview Simple WiFi Controlled Robot Using ARMA IoT and Blynk!This project uses...

Converting the Stereo Audio Distribution Buffer into Stereo Audio Distribution Amplifier

The stereo audio distribution buffer published on page 94 of July 2013 Edition of EFY can be converted easily into stereo audio distribution amplifier.That will add gain and will give new...

Dual Universal Hardware Driver for Embedded Systems

IntroductionThe embedded systems should drive different peripheral devices requiring significant electrical power.A typical case is the DC motors, operating from 6V, 12V and 24V.These motors may require up to 3A average...

Low cost High Impedance Buffers for Oscilloscopes and Voltmeters

Introduction Most of the low cost digital oscilloscopes and voltmeters have input resistance around 1MOhm and input capacitance around 100pF.But in many case we are in need of input resistance above 10MOhm...

Bipolar Power Supply with LM317T and with LM337T Controllable with Stereo Potentiometer

Introduction LM317T and LM337T are well known and low cost adjustable voltage regulators with current limiting up to around 1.5A and power dissipation up to around 20W.It is useful to have bipolar...

Visual and Audible Monitor for Electronic Interfaces

Introduction Most of the modern PCs and embedded systems have digital interfaces as RS232, printer ports, LIN, etc. for exchanging of commands and data with intelligent peripherals.Figure 1 is showing typical case...