Simple Power Guard – PIC12F683

This is a very simple and accurate power guard circuit. This circuit is useful to guard the electronic or electrical devices from mains transients and spikes. Very high spikes can develop at power on due to sparking in the switch and more serious effects occur when power resumes after a power failure due to high magnetic field in the distribution transformer. This will damage your device permanently. To avo ...

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Power-on Reminder with LED Lamp

Many a times equipment at workstations remains switched on unnoticed. In this situation, these may get damaged due to overheating. Here is an add-on device for the workbench power supply that reminds you of the power-on status of the connected devices every hour or so by sounding a buzzer for around 20 seconds. It also has a white LED that provides good enough light to locate objects when a main fails. Here ...

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Solar power auto irrigation system using microcontroller

Solar power auto irrigation system using microcontroller, In this article you will learn about auto irrigation system. Whats is irrigation system? What is auto irrigation system? How to make irrigation system automatic? How to use microcontroller to make intelligent and automatic? Circuit diagram of solar power auto irrigation system using pic microcontroller. This project just give you idea about solar pow ...

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Linear Tech on how to power LEDs and protect them

In this article, I would like to talk a little bit about LEDs, including why they will become the lighting source of choice, how to power them and also, how to protect them from the hazards they face within their respective implementations. These include high bay lighting, architectural lighting, outdoor street lighting and even 75W incandescent bulb replacement. However, before we get started down this pat ...

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LTC3643 – 2A Bidirectional Power Backup Supply

Features Bidirectional Synchronous Boost Capacitor Charger/Buck Regulator for System Backup Wide Input Voltage Range: 3V to 17V Up to 40V Capacitor Voltage Storage for High Energy Backup 2A Maximum CAP Charge Current Integrated Power N-Channel MOSFETs (150mΩ Top and 75mΩ Bottom) Integrated Power N-Channel MOSFET for Output/CAP Disconnect (50mΩ) Input Current Limit During Charging Fast 1MHz Switching Frequen ...

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Short circuit protection for (almost) any power supply

Step 1: Understanding the circuit The circuit is really easy to understand. A resistor of low value (the resistor value will be explained later) is connected in series with the output of the power supply. As current starts to flow through it, a small voltage drop will appear on it and we will use this voltage drop to determine whether the power supply out put is overloaded or short circuited. The "heart" of ...

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Switch Mode Power Supply (SMPS) Topologies (Part I)

he industry drive toward smaller, lighter and more efficient electronics has led to the development of the Switch Mode Power Supply (SMPS). There are several topologies commonly used to implement SMPS. This application note, which is the first of a two-part series, explains the basics of different SMPS topologies. Applications of different topologies and their pros and cons are also discussed in detail. Thi ...

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Power Management of Xilinx ZedBoard using MMPF0100

This reference design is a power management of Xilinx ZedBoard using MMPF0100 Power Management Integrated Circuit (PMIC). A PMIC is an IC for managing power requirements of the host system and is commonly used in a system-on-chip (SoC) device. On the other hand, the Xilinx ZedBoard, a development board based on Zync-7000 AP SoC, provides appropriate hardware capabilities for interfacing with a number of per ...

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Misc Projects : High Power RGB LED Controller

This is an ongoing project to control a number (currently 5) of Lamina Atlas high power (350-500mA) LEDs. Current progress includes: PCB artwork (in Eagle) with connections for 5 RGB LEDs. Firmware for a Microchip PIC16f887 microcontroller to interface between the FTDI 245R USB chip and a number of Texas Instruments TLC5940 constant current LED drivers. Python ctypes interface to libftdi. A simple Python in ...

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5V & 12V Regulated Power Supply

his project can be used to power up TTL and CMOS based projects, it provides 5 VDC & 12 VDC outputs with an onboard mains transformer.  The project is based on the industry popular 7800 series voltage regulator in TO220 packages. Features Input: 240 VAC Output: 5 V, 12 V @ 600 mA regulated low ripple DC voltage Thermal overload/short circuit protection (provided by IC feature) Power Battery Terminal (PB ...

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