New Ultra-Small Digital Humidity Sensor: Simplicity Meets Proven Performance


Sensirion, the world’s leading manufacturer of humidity, temperature and flow sensor solutions, presents its second generation WLCSP (wafer-level chip-scale package) humidity sensor: the SHTW2. The SHTW2 humidity sensor comes in a flip chip package – an established technology that represents one of the simplest and smallest possible ways of packaging a semiconductor chip and results in a tiny footprint of 1.3 x 0.7 x 0.5 mm3. The SHTW2 also pioneers a new category of ultra-small humidity sensors suitable for applications with the tightest space constraints.

The SHTW2 is based on Sensirion’s CMOSens® Technology, which offers a complete sensor system on a single chip with a digital I2C interface. The sensor is fully calibrated and covers a humidity measurement range of 0 to 100% RH and a temperature measurement range of -30 to 100 °C, with a typical accuracy of ± 3% RH and ±0.4 °C. The operation voltage of 1.8 V and the low power consumption make the SHTW2 perfect for integration in consumer electronics that run on the tightest power budgets, such as mobile phones, wearables and Internet of Things (IoT) applications. With the industry-proven quality and reliability of Sensirion’s humidity and temperature sensors, and constant accuracy over a large measurement range, the SHTW2 offers an unprecedented price-performance ratio. Tape and reel packaging and suitability for standard SMD assembly processes ensure the SHTW2 is ideal for high-volume applications.

New Ultra-Small Digital Humidity Sensor: Simplicity Meets Proven Performance – [Link]

Sound to Light Effect


This project will turn your favorite music into light effects, a microphone picks up the sound and gives  light effects with 6 Red LEDs, ideal for creating fun atmosphere at parties & discos. Supply 9V-12V DC.


  • Supply 9V-12V DC (PP3 9V Battery)
  • On Board Preset for Gain Adjust
  • 6 On Board LEDs
  • On Board Condenser Microphone
  • SMD based small Board
  • PCB Dimension 45.72 X 28.58 MM
  • CN1 Supply Input
  • PR1 Sensitivity Adjust

Sound to Light Effect – [Link]

How to build an Arduino Uno on a BreadBoard


“webgeeks” show us how to setup an Arduino UNO on a breadboard – aka bare minimum arduino:

If you are like and me and enjoy building electronic projects then you might have worked with the Arduino Uno. The Arduino uno is the most popular micro controller of the series and has a large collection of libraries which make working with it very easy. So there would be times where you may need more than one Uno for the project, I like to make my own micro controller rather than buying a new one, as this saves me some money which may be helpful for other such projects.

How to build an Arduino Uno on a BreadBoard – [Link]

ESP8266: SSD1306 Oled Library Release

Daniel Eichhorn writes:

The “ESP8266 OLED SSD1306″ is an open source library which allows you to control those pretty OLED modules from our beloved ESP8266 module. Fabrice Weinberg cleaned up all the ugly pieces of code which I initially wrote caused by my near C/C++ illiteracy. He also added support for Pasko’s BRZO I2C library which is partially written in assembler and allows a much higher throughput over the I2C channel.

ESP8266: SSD1306 Oled Library Release – [Link]

Arduino Bluetooth Tutorial HC-05


Bluetooth is typically a low power, medium range device, in fact it can reach up to 10 meters. Bluetooth operates on the same frequencies as WiFi, 2.4Ghz.Connections are normally one to one meaning no group communication is allowed by the protocol. The connection is established by a master device, which connects to a slave device. In internet terminology the master is the client and the slave is the server.

Arduino Bluetooth Tutorial HC-05 – [Link] – Common Parts Library

Pasted-image-at-2016_06_02-12_13-PM-1024x448 just launched the latest Common Parts Library – it comes with integration with Seeed Studio’s Open Parts Library and a downloadable symbols and footprints library in KiCad, Eagle and Altium.

Today, we are announcing a new version of the Common Parts Library for Production. Continuing on the journey to make it easy to design products and get them to production, this new version provides a holistic view of the supply chain for each part, including information about equivalent parts in the Shenzhen supply chain. This is supplemented by real-time pricing and availability information for each part so that you can make part selection decisions faster. Furthermore, the CPL for Production comes with a single symbols and footprints library in popular PCB design tools including Altium Designer, Eagle, and KiCad – Common Parts Library – [Link]


Tiny Precision Digital Humidity sensor


The new digital SHT3x humidity sensor series takes sensor technology to a new level. As the successor of the SHT2x series it is determined to set the next industry standard in humidity sensing. The SHT3x humidity sensor series consists of a low-cost version with the SHT30 humidity sensor, a standard version with the SHT31 humidity sensor, and a high-end version with the SHT35 humidity sensor. The SHT3x humidity sensor series combines multiple functions and various interfaces (I2C, analog voltage output) with a applications-friendly, very wide operating voltage range (2.4 to 5.5 V). The SHT3x humidity sensor is available in both large and small volumes.

Tiny Precision Digital Humidity sensor – [Link]

5 Amp H-Bridge DC Motor Driver using MC33886


This tiny module has been designed to use in Robotics, Power tools, automotive applications. The module based on MC33886 from NXP, MC33886 is a monolithic power IC comprising control logic, charge pump, gate drive, and low RDS(ON)MOSFET output H-Bridge circuitry in a small surface mount package. MC33886 is a monolithic h-Bridge ideal for fractional horsepower DC-Motor and bi-directional thrust solenoid control. The IC incorporates internal control logic, charge pump, gate drive, and low Rds. MOSFET output circuitry. The MC33886 is able to control continuous inductive DC load currents up to 5A. Output loads can be pulse width modulated (PWM) at frequencies up to 10 KHz. A Fault status output reports under-voltage, short-circuit, and over temperature conditions. Two independent inputs control the two half-bridge totem-pole outputs.


  • Supply 5V to 28V
  • TTL/CMOS compatible Inputs
  • Continuous DC Load Current up to 5.2A min
  • Output Current Limitation at min. 5.2A with PWM Current Regulation
  • Short-Circuit Shutdown for Output Currents over 8A
  • Logic Inputs TTL/CMOS Compatible
  • Operating Frequency up to 10 kHz
  • Over temperature and Short Circuit Protections
  • Under voltage disable Function
  • Output control via two independent inputs (forward, reverse, free-wheeling low/high)
  • Two disable inputs are provided: Low =True and High =True

5 Amp H-Bridge DC Motor Driver using MC33886 – [Link]

DIY Arduino RGB LED Controller Shield


One of our visitors tipped us with his latest project, an Arduino RGB LED controller using low Rds-on MOSFETS, designed in Solo-PCB.

This Arduino shield is designed to drive RGB (Red Green Blue) LED strips by using PWM (Pulse Width Modulation) method. It can brighten up and down each color independently by changing the duty cycle of PWM.You can produce any color by mixing the different percentage of colors. The endless turn rotary encoder on the board allows the user select the channel and change its brightness. Low Rds-on resistance MOSFETs, which are the switching elements, generate very low heat dissipation even used with large number of LEDs.

DIY Arduino RGB LED Controller Shield – [Link]

DIY Voltmeter using a simple voltage sensor and Arduino Uno and a Nokia 5110 LCD

In this video we are going to learn how to build our own voltmeter using a very inexpensive sensor. The voltage we measure is then displayed in a Nokia 5110 LCD display. This project is very easy to build and great learning experience.

With this project we can measure the voltage of our voltage sources, or monitor the battery level of our projects. Let’s see the project in action. I have connected two wires to the voltage sensor module I am using today. I place the red wire to the positive terminal of an AA battery and the black wire to the negative terminal of the battery. In the display we get its voltage. Let’s now try this 18650 battery, we get 3.6V. Let’s now measure this big 12V battery. The voltage is 12.2V. If we compare the readings with a Multimeter, we can see that the measurements are really close! The project is working fine. But be careful, the maximum input voltage that this sensor can measure is 25V, so if you exceed it, you are going to burn your Arduino Pin. Let’s now see how to build this project.

DIY Voltmeter using a simple voltage sensor and Arduino Uno and a Nokia 5110 LCD – [Link]