Tech

Function and Waveform Generators – IC

An Oscilloscope could be used to monitor the test points and the output of systems or modules. A function generator injects the input or simulates a input condition. It could be Sine Wave, Triangle Wave, Ramp or Square wave. Frequency, Amplitude and Duty cycle (square) are variable settings.

For radios and amplifiers a simpler set is used it is called "Signal Injector" and "Signal Tracer". In Digital System a Pulse Generator and a Logic Probe may be used.

delabs Notes

Integrated-Circuits

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Active Filter Design with OpAmps

Analog Design

This is yet another Application Note of Exar found in- "Applications Data Book" June 1981. The availability of low cost dual or quad operational amplifier IC's have made the operational amplifier based active filter techniques cost effective over conventional passive filters.

The recent availability of programmable quad operational amplifiers such as the XR-4202 or the XR-346 have provided the active filter designer with the flexibility to externally program gain-bandwidth product, supply current, input bias current, input offset current, input noise and the slew rate.

Tech-Reference

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Why Wi-Fi gaining over RJ45

Computer Interfacing

The speed of data transfer on a wired connection depends on Cable, Connector and the Crimping. Ethernet over Coax (EoC) co-axial cable. Optical and Gigabit Ethernet over Optic Fibers. Copper twisted pair and others are other means of Digital Data Transfer over Ethernet.

Wi-Fi and WiMax helps freeing the user from wires. Remember Wired is more secure than Wireless.

Building a RJ-45 Ethernet cable of a specific length

Tech-Reference

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LM723 Power Electronics Workhorse

Power Electronics

This is another versatile and flexible chip. I could design current sources, voltage to current transmitters, level translation and many more. You can think of applications beyond the Power Electronics Scope with this. Input voltage up to 40V, Output voltage adjustable from 2 to 37V, Output current to 150mA without external pass transistor and Adjustable current limiting.

"The circuit provides internal current limiting. When the output current exceeds 150mA an external NPN or PNP pass element may be used. Provisions are made for adjustable current limiting and remote shutdown."

Integrated-Circuits

LM335 Cold Junction Compensation

Analog Design

Temperature Sensors like Thermocouples need cold junction compensation as a part of front end signal conditioning, this is done at the terminal block where the Thermocouple wires are terminated. This design has to be more accurate and broad, if the design we make has to work well in both Tropical and Temperate Climate Zones.

Another Method using a Copper Resistor

Sensors

PWM Control Circuit - TL494

Power Electronics

The TL494 incorporates all the functions required in the construction of a pulse-width-modulation (PWM) control circuit on a single chip. Designed primarily for power-supply control, this device offers the flexibility to tailor the power-supply control circuitry to a specific application.

SMPS-Power-Supply

Flintec precision Weight Measurement

Process Control

Flintec are a world leading manufacturer of weight and force measurement devices. We supply load cells, force sensors and weighing electronics to a wide range of industries and applications. Whatever your weight or force measurement needs, Flintec can supply a range of standard products, our team of engineers can also help if you require a distinctive, customised, solution.

Flintec precision Weight Measurement

Sensors

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Beige Bag Software User Resources

Analog Design

The latest version of the popular and powerful mixed mode simulator builds upon B2 Spice A/D v4's powerful capabilities to reach new standards in ease-of-use, power, and capabilities. Virtual Instruments - oscilloscope, ammeter, voltmeter, wattmeter, distortion meters. Curve Tracer to plot the behavior of a device before you place it in your circuit.

B2 Spice v.5 Circuit Simulation Software

Beige Bag Software User Resources

Tools

interfacebus.com - Interface and Cable design

Computer Interfacing

Providing detailed electronic design information regarding Interface, Computer, Cable, Processor and Embedded Buses. - Leroy Davis Buses used on Personal Computers, Computers & Peripherals, Standards, Wireless, Logic Design.

interfacebus.com - Interface and Cable design

The site is geared toward Engineers who develop or design equipment. There are 3 main sections; OEM Equipment / Components listings, Computer buses, and engineering design data.

Interface-Circuits

Erlich Industrial Development Corporation

Test Instrumentation

High-end computerized lab equipment, accessories and sensors. They also manufacture OEM transducers, signal conditioners, industrial standards interface boards and kits. (USA Firm). Erlich Industrial Development Corporation (EID) is an OEM manufacturing and R&D Company specializing in the development of high technology biological, medical and chemical research products.

Adjustable Output Positive Voltage Power-Supply Kit

Sensors

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