This is a connection between arduino mega thermocouple and Nokia 5110 screen to display temperature which ranges till 1000*C. It can be used to measure temperature of engine.
Arduino + Thermocouple + Nokia 5110 LCD – [Link]
Ted Yapo has designed a multi-year always-on LED replacements for gaseous tritium light sources.
TritiLEDs are always-on battery powered LED glow lights for general night-time marking use. Radioactive gaseous tritium light sources (GTLSs) are allowed in the United States in several consumer product categories, including watches, compasses, and gun sights, but general-purpose markers are considered “frivolous” and are prohibited. Levaraging advances in LED efficiency, battery capacity, and microcontroller technology, TritiLEDs run from 1 to 15 years depending on battery choice, and while larger than typical GTLSs, can replace expensive and sometimes illegal tritium lighting in a variety of applications (including the fivolous). Version 1.0 of the hardware and software is complete and released under an open-source (CC-BY-SA) license. Versions 1.1 and 2.x are works-in-progress and will be documented here as they are developed.
TritiLED – Multi-year always-on LED – [Link]
Johan Kanflo’s Esprog pogo pin connector:
The FTDI connector can be found on just about any ESP8266 design. If you are building a gadget to be deployed somewhere and not a full blown development board, the FTDI connector is somewhat overkill. And it is quite large. A few pins could be shaved off but we still have a through hole connector invading the other side of the PCB. I ended up designing my own connector and it has been used sucessfully in all of my recent projects.
Factory programming ESP8266 gadgets – [Link]
A how-to on building an ESP8266 based plane spotter from Daniel Eichorn:
In order to get this project running you’ll need the following list of hardware:
- NodeMCU ESP8266 module or Wemos D1 Mini
- 0.96″ SSD1306 OLED display
- A few connectors and USB Wire
- Or order a complete starter kit from my shop
ESP8266 based plane spotter – [Link]
by Julien Happich@ edn-europe.com
Designed for infrared illumination for cameras, surveillance systems or machine vision, the Oslon Black SFH 4715A infrared emitting diode (IRED) boasts a low thermal resistance of maximum 11K/W, delivering a 850nm beam with an optical output of 770mW at 1A
Higher outputs can be achieved with stack versions, in which two emission centers are provided per chip. The device features a low component height of 2.3 mm.
The device is ESD safe up to 2 kV and will soon be qualified to AEC-Q101-REV-C for automotive use.
850nm infrared LED outputs 770mW at 1A – [Link]
Heat activated cooling fan controller is a simple project which operates a brushless fan when the temperature in a particular area goes above a set point, when temperature return normal, fan automatically turns off. The project is built using LM358 Op-amp and LM35 temperature Sensor. Project requires 12V DC supply and can drive 12V Fan. This project is useful in application like Heat sink temperature controller, PC, heat sensitive equipment, Power supply, Audio Amplifiers, Battery chargers, Oven etc
Heat Activated Cooling Fan Controller – [Link]
aimtec.com has a basic article on how to limit inrush current using passive components.
Inrush current or input surge current refers to the maximum, instantaneous input current drawn by an electrical device during its initial turn on.
Power converters also feature high inrush currents relative to their steady state currents that may be several times their normal full-load current when first energized.
The inrush current of a power converter is typically the charging current of the input capacitance.
Limiting Inrush Current – [Link]
In this tutorial we will be creating a MOOD (you can create any color you can imagine to fit your mood) light, that can be controlled from your smartphone, we will be creating the APP too (NO ANDROID APP CODING required)
Wireless mood light with Arduino & BLYNK – [Link]
by Harry Baggen @ elektormagazine.com:
The Belgian nanoelectronics research center Imec has developed a very efficient bifacial n-PERT (BiPERT) solar cell technology with a bifaciality factor of nearly 100%. The cell efficiency at the rear is nearly as high as the efficiency at the front.
Bifacial solar cells capture not only the light falling on the front of the solar panel, but also the light falling on the rear – including light reflected from clouds or the background, diffuse light, and even direct light at sunrise and sunset. Bifacial module are therefore able to generate more electricity than conventional monofacial modules.
Bifacial solar cells boost efficiency – [Link]