Free Elektor Article: Using E-paper with the Arduino
https://www.electronics-lab.com/free-elektor-article-using-e-paper-arduino/
Electronic paper — a.k.a. e-paper — is an unusual type of display. Once a picture (or text) is displayed, no further energy is required to maintain the display. Energy is only required to change the display. This is very useful in applications where the amount of available energy is limited. In this article we describe […]
Free Elektor Article: Card Sound
https://www.electronics-lab.com/free-elektor-article-card-sound/
With a smartphone or an MP3 player it’s easy to play audio files, but generally not at room strength or if you can, only in wretched quality. The Card Sound project makes it possible to fill the room with music and have excellent sound reproduction! This lightweight and compact player also stands out for its […]
Free Elektor Article: DDS Function Generator
https://www.electronics-lab.com/free-elektor-article-dds-function-generator/
DDS chips are readily available, greatly simplifying the design of the analog part of a wide-range function- or signal generator. All you need to do (they say!) is choose one, add some suitable output circuitry, pick a microcontroller, provide a user interface and start programming. To which we reply: sweet dreams, here is the real […]
Free Elektor Article – Spiral MicroTesla
https://www.electronics-lab.com/free-elektor-article-spiral-microtesla/
Original publication: Elektor magazine 6/2017, page 58. Author: Daniel Eindhoven. Free download expires Friday 27 December 2019. 1. Introduction It seems to be an unwritten rule in Hollywood: there must be an assortment of devices that crackle and spark in the lab of a mad scientist. It doesn’t matter that all those noises and flashes […]
Free Elektor Circuit – An NE555 Watchdog Timer
https://www.electronics-lab.com/free-elektor-circuit-ne555-watchdog-timer/
from an Idea by Wolfgang Borst (Germany) Virtually every modern microcontroller has a built-in watchdog. It prevents the microcontroller ‘hanging’ which may be the result of a programming error or an unforeseen operating condition, where, for example, the program becomes trapped in an infinite loop and no longer reacts to external or internal input. In […]
Free Elektor Article: Arduino Temperature Recorder
https://www.electronics-lab.com/free-elektor-article-arduino-temperature-recorder/
Using the tiny Arduino Uno, you can build all manner of really neat small projects at modest cost. This one is a simple temperature recorder that shows on a display screen the values measured during the past 24 hours. Of particular note is the software, which manages all of the operations without recourse to external […]
Free Elektor Article: Precision Control for DC Motors
https://www.electronics-lab.com/free-elektor-article-precision-control-dc-motors/
This control circuit will provide the correct rotational speed and direction of a 12-V DC motor. Nothing special in that? But there is definitely, when you consider the multitude of potential options for actuating the motor. You can adjust the speed manually with a potentiometer (‘pot’), using a DC voltage level between 0 and 5 (or […]
Free Elektor Article: USB Pseudo Battery
https://www.electronics-lab.com/free-elektor-article-usb-pseudo-battery/
Original publication: Elektor magazine September 2015, page 102 Author: Danny Winkler Free download expires: Friday 20 September 2019 Elektor PCB available: yes, low stock. Extra boards available by 23 September 2019, please check article page Please Note: Four years since its original publication, the referred article may contain components, software elements and/or linked urls that […]
Free Elektor Article: Line AC Switch Controlled by Bluetooth Low Energy
https://www.electronics-lab.com/free-elektor-article-line-ac-switch-controlled-bluetooth-low-energy/
This article describes the electronics, the BL600 program and the Android program; the last being an Android smartphone application with which your mains switch circuit may be controlled wirelessly. You may notice an unusual detail for these pages — the transformerless power supply. Go to the article page and download a pdf copy of the […]
Free Elektor Article: Improved Radiation Meter
https://www.electronics-lab.com/free-elektor-article-improved-radiation-meter/
Author: Burkhard Kainka All that’s required to measure radiation is a simple PIN photodiode and a suitable preamplifier circuit. We present here an optimised preamplifier and a microcontroller-based counter. The microcontroller takes care of measuring time and pulse rate, displaying the result in counts per minute.The device we describe can be used with different sensors […]