Optocoupler speed-up also reduces power consumption

Standard optocoupler speed is limited mainly by the relatively slow response of the phototransistor. This Design Idea adds components to the LED drive side to speed things up. Figure 1  The speed-up circuit not only increases speed of propagation of a rising input signal, but achieves this speed-up at lower power consumption, compared to simplistic driving of the LED through a resistor. R1 is the original L ...

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2 NEW FAMILIES FROM MICROCHIP

Microchip has introduced two new 8-bit MCU families with integrated Core Independent Peripherals (CIPs). You may be thinking that 8-bit processors are unlikely to cut the mustard for many of today’s applications but built-in interconnected CIPs combine to perform functions autonomously, without intervention from the processor. This makes these new 8-bit families suitable for a much broader range of applicat ...

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UT204 is able to measure DC current and also True RMS

Clamp multimeter UT204 measures reliably even in real conditions of nowadays mains supplies and for an affordable price moreover. UT204 from company UNI-Trend is a near relative to the UT203. multimeter. Already UT203 provides a lot of user comfort and a very pleasant feature - measuring of a DC current without interrupting a measured circuit. However UT204 is different from its “weaker” brother in one esse ...

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Engine and Steering Wheel Automotive Networking Protocol

An automobile plays an important role in a community. Aside from being a major option for transport, automobile also saves life, which is designed to give support in medications and hospitalizations. These machines are now embedded with electronic technology in which this advancement brings security and convenience to people. The engine and the steering wheel are major parts, which made an automobile useful ...

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Avago 2.5A optocouplers are mil-spec

The ACPL-5160 is a commercial grade hermetically sealed optocoupler in a 16-Pin ceramic DIP package with gold plated leads. Solder dipped leads and various lead form options are also available. See the datasheet for details. This family of Avago 2.5A Gate Drive Optocouplers provides Integrated Desaturation (VCE) Detection and Fault Status Feedback for IGBT VCE fault protection in a rugged, hermetically-seal ...

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A low-cost 0.5A 33V LED driver module with 90+% efficiency

Introduction This article describes simple constant current driver module with fast PWM input that can be used for driving medium and high power LEDs. The module uses an integrated constant-current output, DC-DC buck converter with output current configurable from 0.1 to 0.5A. This article outlines the schematic, design guidelines, operation, and performance of the low cost LED driver. Short description LED ...

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Low-loss Step-down Regulator

Adding to their ever growing family of power supply regulators Linear Technology have introduced the LTC3807 step-down switching regulator DC/DC controller driving an all N-channel external synchronous power MOSFET stage. The chip uses a constant frequency current mode architecture allowing a phase-lockable frequency of up to 750 kHz. The chip draws just 50 μA no-load quiescent current and an OPTI-LOOP comp ...

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Programmable 8-character LCD module and digital voltmeter

Signal and power from the same voltage source Most hobby electronics store carry cheap and ready to use digital voltmeter modules (DVM) the problem with those is that they do usually require an independent power source to power the DVM-module. Many circuits are made such that you have one power supply and you would like to power your circuit and the voltmeter module from this one single power supply. This i ...

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Reverse Engineering A Counterfeit 7805 Voltage Regulator

Under a microscope, a silicon chip is a mysterious world with puzzling shapes and meandering lines zigzagging around, as in the magnified image of a 7805 voltage regulator below. But if you study the chip closely, you can identify the transistors, resistors, diodes, and capacitors that make it work and even understand how these components function together. This article explains how the 7805 voltage regulat ...

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Site enables detailed component comparisons

Choosing components is a series of time-consuming tasks, from surveying the market for possible candidates to properly evaluating performance. As a hardware engineer who has worked in Silicon Valley for 10 years, I have spent significant time developing test plans and specs, building fixtures, and testing components. One of the reasons comparing components takes a long time is because you can’t always rely ...

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