DC-DC converter starts up and operates from a single photocell

The bq25504 from Texas Instruments is a good candidate to become a milestone on the road to micro-power management and energy harvesting. A prominent feature of this IC is its ability to start up at a supply voltage as low as 330 mV typically, and 450 mV guaranteed. With an SMD inductor and a few capacitors and resistors, it forms a dc-dc converter with a high power efficiency that is unprecedented, especia ...

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NIXIE CLOCK CLAIMS TO BE SIMPLEST DESIGN

[Engineer2you] built a nixie tube clock and claims it is the simplest design. We felt like that was a challenge. In this design, the tubes are set up as a matrix with optoisolators on each row and column. With 60 segments, the matrix allows you to control it all with 16 bits. There are six columns, each corresponding to a digit. That means each row has 10 lines. The Arduino code reads the clock and pro ...

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Fujitsu Electronics Europe expands its Bluetooth Low Energy portfolio

Adding components from Ambiq Micro and Talent Highland, Fujitsu Electronics Europe has increased its Bluetooth Low Energy portfolio. The additional products offer customers high integration, low power consumption and flexibility, says Fujitsu Electronics Europe (FEE), and it has produced the ClickBeetle reference platform (pictured) to facilitate the integration of Bluetooth Low Energy products into applica ...

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Flex Power Modules launches 1000W DC/DC advanced bus converter

Based upon Flex Power Modules’ Hybrid Regulated Ratio (HRR) topology, the BMR480 DC/DC bus converter module delivers up to 1000W and 96.2A peak power. The BMR480 DC/DC advanced bus converter targets high-end and high-power applications. It is available in an industry-standard and low-profile quarter-brick-format with dimensions of 58.4 x 36.8 x 12.19mm (2.30 x 1.45 x 0.48-inch), and operates from a wide inp ...

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DIY Light (Lux) Meter using BH1750 sensor, Arduino and Nokia 5110

Introduction Hi guys, continuing on our recent path of building really cool stuffs based on the Nokia 5110 LCD display, today we will be building a DIY Lux (or light) meter using the highly sensitive BH1750 light sensor. Illuminance (measured in LUX) is the total luminous flux incident on a surface, per unit area. It is a measure of how much the incident light illuminates the surface, it is wavelength-weigh ...

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Embedded oscilloscope family for advanced electronics

Signal analysis: quick results See small signal details in the presence of large signals The R&S®RTM3000 features a customized Rohde & Schwarz designed 10-bit A/D converter that delivers a four-fold improvement over conventional 8-bit A/D converters. The increased resolution results in sharper waveforms with more signal details that would otherwise be missed. One example is the characterization of s ...

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A STM32F4 BASED ARDUINO IN THE FEATHER FORM FACTOR

[minh7a6] loves the Adafruit Feather, but sees some room for improvement. First is the matter of 5V tolerance. While just about everything is available in a 3.3v range these days, sometimes it’s just nice not to have to care. The main controller on the Feather is plenty powerful, but its intolerant pins just wouldn’t do so it was swapped for a chip from the ever popular STM32F4 line. Then he wanted bet ...

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Car Dash Tablet

Putting a tablet in car dash.This project was on my mind for a long time.Somehow I couldn’t find any free time to build this project. But now I have done it and I’ll tell you how. My car is a VW Polo (2014 ) and don’t have any bluetooth connectivity with smartphones or so. And also it doesn’t have any GPS Navigation applications. So my purpose was to put a tablet instead of the useless car radio. With an An ...

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HC-12 433MHz wireless serial communication module configuration

Description HC-12 are cheap 433MHz wireless serial port communication modules with a range up to 1800m in open space. Each costs about $5 when bought from China, and 2 of them can create wireless UART link that can be used, for example, to transfer telemetry data from UAV. Or drive IoT device. Or connect sensors. Or whatever else one can think of. It is based on SI4463 RF chip, has build in microcontroller, ...

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Drumming MIDI Glove Using Arduino and Light Sensors

I will describe a fun and easy way to build your own sound expression MIDI enabled glove without expending lot's of money on MIDI Interfaces or expensive sensors. Feel free to contact me directly by mail if you like it or have suggestions.  This project was inspired by other do it yourself projects using Piezo (buzzer) as input sensors but they are too big and need filtering for precise velocity readin ...

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LTC3402 – 2A, 3MHz Micropower Synchronous Boost Converter

Features Synchronous Rectification: Up to 97% Efficiency 2A Switch Current Rating Fixed Frequency Operation Up to 3MHz Wide Input Range: 0.5V to 5V Very Low Quiescent Current: 38µA (Burst Mode Operation) 2.6V to 5V Adjustable Output Voltage 0.85V (Typ) Start-Up Voltage No External Schottky Diode Required (VOUT < 4.3V) Synchronizable Switching Frequency Burst Mode Enable Control Antiringing Control Reduce ...

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Design and Implementation of a 12 Lead Portable ECG

During the academic year of 2016-2017 at McMaster University, in conjunction with Dr. DeBruin, Christina Riczu, Thomas Phan and Emilie Corcoran, we developed a compact, battery powered, 12-lead electro-cardiogram. The project won 1st place in the biomedical category at the ECE Capstone Poster Day. The final report we handed in for the course is attached at the end of this post and includes background inform ...

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