Charging batteries rapidly and safely

Any hobbyist can charge a battery quickly, but can you do it without an explosion, excessive heating or major degradation in battery cycle life?   Well many companies have managed fast charging techniques  that typically use specialized algorithms. These algorithms take into account the chemistry of the battery and some sort of non-standard charging rate curve. Many device manufacturers and wireless op ...

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Bike Across the Country While in Your Basement

About this project This is a very simple and easy-to-build project that provides a sensor on the pedal crank of any exercise bike and generates keyboard output triggering Google Maps Street View to advance via the up arrow key. In my design, you pedal the crank five times, and then the Street View receives an up-arrow command that advances you to the next Street View panorama. Steering is not included, but ...

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With HAMMOND 1553W enclosures the rain won´t surprise you

Ergonomic enclosures of the 1553 series with a non-slipping surface found their place on a market very quickly. Precise construction with brass bushings, stainless steel screws included, easy PCB placing on standoffs and other details make this series of enclosures universal for practically any “mobile” applications. Despite very well fitting parts of an enclosure minimizing a possibility of a dust ingress ...

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deCart

Description deCart is an attachment to a shopping cart that uses social pressure to make the shopping a more productive, connected experience for society as a whole. List of Materials Although the entire premise of the project is simple, the implementation, however, is not and requires a lot of patience and system building. LCD Display. For us, we used Sparkfun's Basic 16x2 Character LCD - White on Black 5V ...

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Buck controller allows 48V to 1V direct step-down

Key Features Wide input voltage range: 4.5V to 60V Wide output voltage range: 0.6V to 54V Light-load efficiency enhancement Low ripple diode emulation mode with pulse skipping Programmable soft-start Supports prebiased output with SR soft-start Programmable frequency: 100kHz to 2MHz External sync PGOOD indicator Forced PWM Adaptive shoot-through protection No external current sense resistor Use lower MOSFET ...

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Arduino stick

Description Mystick is an innovative hiking stick that promote exploration and allows you to share your hiking experiences and special findings with other users. When picked up by a user, the Mystick already has a predetermined location to which it directs using a compass and GPS to direct LED lights in the direction of the location. With the simple push of a button, the users progress to the chosen locatio ...

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Smart Medicine Box

Our ECE 4760 final project is to build a microcontroller based smart medicine box. Our medicine box is targeted on users who regularly take drugs or vitamin supplements, or nurses who take care of the older or patients. Our medicine box is programmable that allows nurses or users to specify the pill quantity and day to take pills, and the serve times for each day. Our smart medicine box contains seven separ ...

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Arduino Weight Measurement using Load Cell and HX711 Module

Today we are going to Measure the Weight by interfacing Load Cell and HX711 Weight Sensor with Arduino. We have seen weight machines at many shops, where machine displays the weight just by placing any item on the weighing platform. So here we are building the same Weighing machine by using Arduino and Load cells, having capacity of measuring upto 40kg. This limit can be further increased by using the Load ...

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Arduino Based Distance Measurement using Ultrasonic Sensor

Ultrasonic sensors are great tools to measure distance without actual contact and used at several places like water level measurement, distance measurement etc. This is an efficient way to measure small distances precisely. In this project we have used an Ultrasonic Sensor to determine the distance of an obstacle from the sensor. Basic principal of ultrasonic distance measurement is based on ECHO. When soun ...

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Dilshan R Jayakody’s Web Log

FlashProg - USB serial flash memory programmer FlashProg is USB base flash memory programmer to work with 3.3V serial flash memory devices. This programmer is specifically design to read, program and configure 25x series, serial flash memory devices which are commonly used to store BIOS in PC mainboards. Originally we design this project to read and program BIOS of Foxconn G31MXP mainboard. Our version of G ...

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LPG Leakage Detector using Arduino

While LPG is an essential need of every household, its leakage could lead to a disaster. To alert on LPG leakage and prevent any mishappening there are various products to detect the leakage. Here we have developed an Arduino based LPG gas detector alarm. If gas leakage occurs, this system detects it and makes an alert by buzing the buzzer attached with the circuit. This system is easy to build and anyone w ...

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DIY Dual Stepper Motor Driver Shield for Arduino

Stepper motors are brushless DC motors which can move in discrete steps thanks to the special coil arrangement inside. They are very popular in DIY and industry projects which require accurate mechanical movement control.  In this SoloPCB Designer project, we are building a dual stepper motor driver shield based on two Allegro A4988 ICs which can supply up to 35V and 2A and provide overcurrent and thermal p ...

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