Month: August 2016

[devttys0] designed a sensitive IR detector for capturing weak infrared signals. He shared in detail how he designed the circuit, beginning from the basic components, walking through solving the problems and finally ended up with a complete working circuit. Craig Heffner/[devttys0]...

A highlight from CNXSoft about Holtek HT48R002 MCU as the cheapest MCU. HT48R002 is a 8-Bit OTP (One Time Programming) MCU with the following key features (datasheet): 8-bit RISC MCU @ 8MHz. 1K x 14-bit ROM (OTP). 64 x 8-bit RAM data memory. 6x I/O including 1x external...

A DIY ECG made from single op-amp (LM741) and 5 resistors by Scott Harden: I made surprisingly good ECG from a single op-amp and 5 resistors! An ECG (electrocardiograph, sometimes called EKG) is a graph of the electrical potential your heart produces as it beats. Seven years ago I...

Paul Rako @ edn.com discuss about thermal PCB layout tips. Texas Instruments' WEBENCH is a neat program, especially because it has Mentor Graphic’s FloTherm built in to help you see the hot spots in switching regulators. This is what taught me that a modern buck regulator will have...

Patsiatzis Nikos and Katsaros Nikos build the space invaders game using a ZedBoard FPGA. The project's code is available on github. This two person project was completed through the course of Embedded Systems at the University of Thessaly, Department of Computer Engineering. In...

Giovanni Carrera designed a circuit that accepts input voltage from about 20mV to 5V or a current of 4 to 20 mA and converts it to a isolated frequency signal. A voltage to frequency converter can realize an opto-isolated analog input for Arduino or other microcontroller systems....

In this tutorial codebender_cc uses the Adafruit TSL2561 sensor to measure LUX with Arduino. The TSL2561 luminosity sensor is an advanced digital light sensor, ideal for use in a wide range of light situations. Compared to low cost CdS cells, this sensor is more precise, allowing for...

Circuit wizard is one of the good simulators for beginners. Here the tutorial explains how to draw and simulate a circuit in circuit wizard simulator CIRCUIT WIZARD - Circuit Simulator for beginners -...