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Sonicare toothbrush teardown: microcontroller, H bridge, and inductive charging

Sonicare toothbrush teardown: microcontroller, H bridge, and inductive charging My Sonicare electric toothbrush recently quit working, so I took it apart and examined the interesting circuitry inside. There's much more complexity than I expected inside a toothbrush, especially in the mechanism that drives the brush head at 31,000 strokes per minute. Internally, the brush appears to be designed for quality r ...

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Digital Clock using AVR Atmega16 Microcontroller

Digital clocks revolutionize the way we live our daily life as it helps people to stick with their schedule. This article will teach you to build your own Digital clock using DS1307 RTC Chip with Atmega16 microcontroller. As we all know that DS1307 is a simple real time clock chip which shows seconds,minute,hours,day,date and year. We have used a simple 16×2 LCD along with it to display all the data obtaine ...

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Volt-Amp meter using AVR microcontroller

Voltage and current are two most important parameters of electricity. This project teaches you to build a simple volt-amp meter using avr microcontroller. This project may not enable you to build a high end measurement tool but will be a good diy project which gives a better understanding on A/D converter in microcontrollers. This meter is capable of measuring voltage ranging from 0 to 30V and current rangi ...

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Interfacing GSM Module with Atmega32 AVR microcontroller

GSM (Global System for Mobile Communication) technology lets user to communicate with others across mobile networks hence it offers a vast area of coverage. Interfacing GSM technology with microcontroller will enable us to extend the communication to cover large area. This tutorial will teach you about interfacing GSM module with atmega32 AVR microcontroller and program it to communicate it with another use ...

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10 steps to selecting a microcontroller

Selecting the right microcontroller for a product can be a daunting task. Not only are there a number of technical features to consider, there are also business case issues such as cost and lead-times that can cripple a project. At the start of a project there is a great temptation to jump in and start selecting a microcontroller before the details of the system has been hashed out. This is of course a bad ...

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How to control LM2596 buck-converter with microcontroller

Those buck converters will change the output voltage to make the feedback pin, connected to the output via a voltage divider, become 1.25V or so. If feedback is higher, output gets lower and vice versa. If one changes the ratio of resistors in voltage divider, output voltage will change. This is usually done by turning a trimmer resistor with a screwdriver. That is good enough for many applications where vo ...

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Distance Measurement using Infrared Sensor with ADC0804 & 8051 Microcontroller

Summary This project primarily consists of four units: Microchip Technology's SST89E54RDA-40-C-PIE, a sensor unit, an ADC0804 ADC component and the LCD module. Along with detecting an obstacle, its exact distance is also calculated and displayed on a 16x2 LCD interfaced to the microcontroller. The IR receiver detects the IR radiations reflected by the object being measured. The output voltage level of this ...

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