Smart LED Flashlight


Vitaliy_M @ has build a nice little LED flashlight.

The flashlight turns on automatic for 60 seconds when it senses that the room is dark enough.

To turn on manual light for additional 60 seconds you need to push the RST button.

Smart LED Flashlight – [Link]


Wemos D1 mini: A first look at this ESP8266 based board has a new video discussing about the Wemos D1 mini board.

In this video we are going to take a first look at the Wemos D1 mini board. The new impressive ESP8266 based board. It is very small in size, very inexpensive but very powerful!

If you have watched some of my previous videos you will remember that I recently tested the WeMOS D1 board which resembles an Arduino Uno but uses the much faster and capable ESP8266 chip. Recently I discovered on another very promising board, the D1 mini board which also uses the ESP8266 chip. This board costs $5.6 and was kind enough to send a sample unit in order to test it and share my opinion about it with you.

Wemos D1 mini: A first look at this ESP8266 based board [Link]

IN-4 Nixie Clock using ATmega168


andrea biffi @ has a detailed tutorial on how to build your own Nixie clock using IN-4 tubes and Atmel ATMega168 microcontroller.

Nixies are neon valve tubes, where ten cathodes have shape of digits and are lighted up by plasma when high voltage flows through them. I love these old era displays, which have been employed in last century before I was born.

In last year I’ve been slowly collecting components and knowledge to build some nixie clocks as Max Pierson’s beautiful creation, I like the old style, the roundness of glass tubes, the rough wood case, the simplicity of the design. That clock has definitely inspired my project. Even though I really love vertical digits arrangement I keep that original feature for my next clock.

IN-4 Nixie Clock using ATmega168 – [Link]


Arduino LED Scroll Bar using easyEDA


Today I want to make a LED Scroll Bar as is shown in the picture above. Ten LED strips can flash in different effect by using a control board.

Components: LED strip, Arduino Nano, Dupont line and a control board.

Arduino LED Scroll Bar using easyEDA – [Link]

SmartWatering – Arduino plant watering


Arduino based project in charge of taking care of your green plant.

Particle Core based project in charge of taking care of my green plants.

The water pump will not work with a voltage under 5V. In order to power it, I soldered a wire straight on the VUSB pin of the USB header. The following picture illustrates where to solder the wire on the former Arduino Nano. You can do the same with the Particle Core diode (black component between the USB header and the VIN pin).

SmartWatering – Arduino plant watering – [Link]

Easy Planter – A Simple Way Of Monitoring Plants


Easy Planter is a plant monitoring device able to sense temperature, humidity, pressure, moisture, light etc.

A small bluetooth low energy plant sensor that easily fits into a plant pot. It can monitor temperature, humidity, pressure, moisture, light, and has I2C extension pins so that you can add other modules. Information is sent to a phone, and notifies you when it needs something.

Easy Planter – A Simple Way Of Monitoring Plants – [Link]

One Channel Infra Red Remote Controller


One Channel Infra-Red Remote and receiver with onboard Relay provides normally open and normally closed output. The project based on PIC12F683 Microcontroller from Microchip , TSOP1738 used as Infra-Red receiver. Micro-controller decodes the RC5 serial data coming from TSOP1738 and provides high output if the data is valid. The output can be set Momentary or Latch using on board Jumper (J1) and closure. The board provided with 3 LEDs, Power LED, Valid Transmission LED and Output LED. This Remote works with switch No1 of RC5 Remote.


  • Power Supply Remote 2X AA Batteries
  • Power Supply Receiver 7-12V DC
  • Current Consumption Receiver 30mA
  • Onboard jumper for momentary and latch operation selection
  • Transmitter range 10-15 feet
  • RC5 (Philips) Remote
  • Onboard power LED
  • Onboard output ON/OFF LED
  • Onboard Valid Transmission LED
  • Onboard 5V regulator
  • PCB Dimensions 59.06 MM X 29.53 MM

One Channel Infra Red Remote Controller – [Link]

Proteus Tutorial – Light Emitting Diode (LED) and Bar Graph Display

Selection-of-Edit-Properties-Option-in-Proteus guide us to the basics of LED and bargraph usage in Proteus software.

In this post we will be learning on how to use the “Light Emitting Diode (LED)” component in Proteus simulation software. In case you have not got on through the basics of Proteus, here is the link – Proteus PCB Design and Simulation Software – Introduction.

Proteus Tutorial – Light Emitting Diode (LED) and Bar Graph Display – [Link]

Maximize the Energy from Long-Life Batteries



Battery lifetime is a key consideration for the development of the wireless sensor nodes that will populate the Industrial Internet of Things (IIoT). In many applications, the sensor nodes will need to be installed in locations that are difficult to reach let alone service. The sensor nodes need to be autonomous in terms of energy because it is too costly and difficult to run power lines to them or to have maintenance workers replace batteries regularly.

Maximize the Energy from Long-Life Batteries – [Link]

How to Interface Flux Sensor


This tutorial is going to teach you the basics on using Flux Sensor:

It is a flex sensor which is 2.2 inches in length. This sensor works by bending the sensor itself. As the sensor is being flexed or bent, the resistance across the sensor increases. The greater the angle of bending, the greater the resistance. This can be tested with multimeter. The resistance of the flex sensor changes when the metal pads are on the outside of the bend (text on inside of bend).

How to Interface Flux Sensor – [Link]