This instructable shows you how to make an electrocardiograph and a heart rate monitor. It is intended to be a fun science project only. Of course, it should not serve as a medical purpose. PLEASE NOTE : To avoid any risk of electric shock, only use battery alimentation. Electrodes are theorically isolated from the circuit […]
Electrocardiograph & Heart Rate Monitor Continue Reading
Quectel M95 communication module is already well-known among designers and we can say, that also very favorite. Its producer also knows this fact, that´s why Quectel decided to come to the market not with a new type, which might have other package, functionality,…. but a new version of M95, marked as M95FA. M95 FA maintains
New version of the GSM/GPRS module Quectel M95 is here Continue Reading
Extremely cheap low-speed PC/USB oscilloscope with STM32 (STM32F042) microcontroller. Quick specification follows miniscope v2a-d idea: very simple device streaming data in real time to PC; DLL and GUI (Win32) are handling all the functionality, sampling: 480 kSps, 8 bit, single voltage range, streaming via USB FS with libusb (32/64bit) used as driver, record length: 4k
Miniscope v2e Continue Reading
You don’t need to travel far in the Dutch countryside before you come across a traditional windmill. Now a consortium of Rotterdam-based companies are planning to build a massive wind-powered generator structure in Rotterdam harbor that will generate energy without using rotating blades. The innovative ‘Windwheel’ will work on the EWICON (Electrostatic WInd energy CONverter)
A Bladeless Wind-Powered Generator Continue Reading
This is the PCB from https://github.com/vhs/vhs-pcbs/tree/master/usb-isolator. No components are included, PCB only. In one of the earlier SMD workshops I’ve running at VHS I managed to temporarily kill my new MacBook pro when I plugged in a participant’s prototype. I revived it by removing the back cover and disconnecting the battery all the time chanting to
Simple USB Isolator Continue Reading
This is the story of how I made my first robot, and the instructions to build one yourself. It’s a simple line tracer, controlled by two op-amps. No microcontroller, no programming… simple analog circuitry. I tried to make it as small as possible, using SMD components and tiny motors. I’m very happy with the final
Build A Mini Line Tracer Robot Using Arduino Continue Reading
The VL6180X is the latest product based on ST’s patented FlightSense™technology. This is a ground-breaking technology allowing absolute distance to be measured independent of target reflectance. Instead of estimating the distance by measuring the amount of light reflected back from the object (which is significantly influenced by color and surface), the VL6180X precisely measures the
Proximity sensor, gesture and ambient light sensing (ALS) module Continue Reading
PORTLAND, Ore. — Complementary metal oxide semiconductor (CMOS) imaging chips are becoming the industry’s leader in advanced process technology — instead of the traditional leaders (processors and memory) — thanks to strong demand for CMOS imaging chips in everything from smartphones to tablets to medical equipment and automobiles. Apparently, now the innovation surpasses Moore’s Law,
CMOS Image Sensors Surpassing Moore’s Law Continue Reading
This project starts a few months ago. Juan Brito, author of the blog Desafio Ecuador, contacted with me to talk about Scratch and the opportunities that gives this programming enviroment in the world of education. In his own words: I and Danny Macancela are convinced that increase the quality of education in schools and colleges do not require big
K4S, a Keyboard for Arduino to use with Scratch Continue Reading
The Fig 1 circuit uses a Hall-effect sensor, consisting of an IC that resides in a small gap in a flux-collector toroid, to measure dc current in the range of 0 to 40A. You wrap the current-carrying wire through the toroid; the Hall voltage VH is then linearly proportional to the current (I). The current
Current monitor uses Hall sensor Continue Reading
