TheTwim @ instructables.com show us how to make a cheap ESP8266 Arduino Shield This is just the first step to make a cheap Arduino WiFi shield using the ESP8266 module. With few more electronic components and the WiFiEsp library you can build it for less that 10 USD. Cheap Arduino...

theorycircuit @ instructables.com shows us how to use TSOP 1738 IR receiver with your Arduino Board. By using arduino and IR Receiver TSOP 1738 (in our project, you can use any ir receiver available) we can decode any infrared remote code into hex or some other format. Before...

Reliable "industrial" station WSD81i for excellent price and a set with a value of 40 Eur as a free bonus – that´s our gift to you.  Innovated soldering station Weller WSD81i was in-depth introduced to you in our article Weller WSD81i soldering station doesn´t need a...

MTaylor @ sparkfun.com takes a look inside different power supplies he has on his box. Power supplies are everywhere these days. With the advent of switching power supplies, the cost of high-current supplies has radically dropped. Maybe you’ve noticed how the large, heavy,...

Jaanus Kalde wanted to know why his SRF01 sensor fails after dropping from the air so he did a reverse engineering on it. I needed small ultrasonic sensors for a flying sensor. So I got the smallest one - SRF01. Quite nice unit, works down to 0 cm. There were some problems with it -...

Phillip Schuster has build a portable device featuring some ports to connect stuff like sensors and other circuits and some menu driven user interface to trigger various modules doing tests, reading data etc. Working in my lab with electronics I came across different little...

Microchip's application note describes the basics of different SMPS topologies: The 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....

Dilshan Jayakody has designed a board to replace AN6877 base LED drivers using discreet transistors. He writes: AN6877 is linear AF level meter IC produced by Panasonic and it is commonly found on many audio equipment. This chip is no longer manufactured by Panasonic and finding...