How To Select a Capacitor

Capacitors    Capacitors are two-terminal components used for filtering, energy storage, voltage spike suppression, and many other applications. In their simplest form, they consist of two parallel plates separated by an insulating material called a dielectric. Capacitors store electrical charge. The unit of capacitance is Farad (F), attributed to Michael Faraday who was a pioneer in using capacitors for pr ...

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Circuit Simulator

How to use this When the simulator starts up you will see an animated schematic of a simple LRC circuit. The green colour indicates positive voltage. The grey colour indicates ground. A red colour indicates negative voltage. The moving yellow dots indicate current. To turn a switch on or off, just click on it. If you move the mouse over any component of the circuit, you will see a short description of that ...

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MP3 player on a chip from On Semi

ON Semiconductor, driving innovation in energy efficiency, has introduced a new MP3 capable device to support both record and playback in portable MP3 audio applications where there is a strong requirement for miniaturization, reduced bill of materials (BoM) and reduced cost. The LC823430TA audio processing system provides a single-chip solution by integrating digital signal processing (DSP) circuitry for M ...

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Building a simple circuit probe

The Goals Sometimes you need to check one circuit and test some of its nodes. Usually a tester in voltage mode is a good solution, but it has a pair of problems. First, it measures about zero both when the node is driven at zero volts and when the node is floating (not driven at all). Second, it gives the information on the tester display, so you need to take the view from the circuit to the tester to check ...

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Microcontroller In Circuit Serial Programming (ICSP) with Microchip PIC

In Circuit Serial Programming is a method of directly programming a Microchip PIC or Atmel AVR while in they are connected to a circuit, as opposed to programming the chip ahead, and only then soldering it to a circuit. There are many benefits to ICSP, but also some important design considerations which I will try to highlight. In circuit programming has many advantages: It shortens the development cycle – ...

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LED Interfacing with PIC Microcontroller: Embedded C program with circuit using pic microcontoller

How to interface LED with Microchip’s PIC microcontroller? How to connect LEDs to a PIC microcontroller? LED interfacing is the stepping stone for microcontroller development. This is a simple embedded program for PIC 16F877A to interface LEDs, suitable for beginners who wish to study basics of embedded microcontroller programming. The program is developed through Micro C compiler, one of the best solutions ...

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PIC16F690 Microcontroller Circuit- How to Drive an LED Display

In this article, we will show how to drive a 7 segment LED Display using a PIC16F690 microcontroller. This PIC16F690 microcontroller chip is actually a part of the PIC2 Starter Kit, so we will actually be using this starter kit to drive the LED Display. A 7 Segment LED Display is an electronic device that contains 8 individual LEDs. Each of the LEDs can either be on or off. Depending on which LEDs are lit d ...

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Isolated Circuit Digitally Indicates 120-/220-V Line Voltage

or applications such as motor control or power supplies, it’s often necessary to know whether the ac line is at 120 V or 220 V to adjust the operation. The circuit illustrated in the figure monitors the ac line and provides a basic output indicating whether it is at 120 V or 220 V, with the output at the transistor collector going low for 120-V and high for 220-V inputs. Related Measure AC Power Line Proper ...

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Basic circuit for PIC18F24J50 or PIC18F26J50 to work over USB

The basic circuit below will work with any PIC18F2xJ50 microcontroller. You just have to upload the appropriate firmware. Go to Downloads section to find firmware hex files for the microcontroller and the resonator you would like to use. PIC18F24J50 firmware v2.6.3 - all subversions.zip contain the following general use subversions: 4 MHz, 8 MHz, 12 MHz, 16 MHz and 20 MHz, and the following subversions for ...

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Re-Doing my Design for a circuit to control an invention using a Microchip PIC microcontroller chips.

In a previous article I described how I designed the circuitry to control functions of the asparagus harvester.  After bread boarding up a test circuit and doing some initial programming I decided a re-do was in order. I found I had a lot of unnecessary redundancy and I also decided to put the air regulation function on a separate chip from the main controller chip.  I did so because I want the air regulati ...

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