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]

Fluke 279 FC Thermal Multimeter Review

Fluke 279 FC True-rms Thermal Multimeter helps you find, repair, validate, and report many electrical issues quickly so that you are confident problems are solved.

Fluke 279 FC Thermal Multimeter Review – [Link]

5V TO -12V Inverting Switching Regulator


The DC/DC inverting switching regulators project is specifically designed to invert input voltages to negative outputs. It offer input voltage ranges from 4.5V to 6V and output -12V 100mA The MC34063A IC is heart of the project from On semiconductor. The MC33063A is a monolithic control circuit containing the primary functions required for DC-DC converters, This device consist of an internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active current limit circuit, driver and high current output switch. This IC specially designed to be incorporated step-down, step-up, and voltage-inverting applications with minimum number of external components.


  • Input 4.5V To 6V DC
  • Output -12V 100mA
  • Output Fine Adjustable By On-board Preset
  • Header Connector for Output/Input Connections
  • Low Standby Current
  • On Board Filter To Provide Low Ripple Output
  • PCB Dimensions 31.75mmX34.93MM

5V TO -12V Inverting Switching Regulator – [Link]

42V, 3.5A-out buck regulator operates at 175°C ambient


LT8610AX is a 3.5A, 42V input-capable synchronous step-down switching regulator, which operates in ambient temperatures up to 175°C. Synchronous rectification delivers efficiency as high as 95% while Burst Mode operation keeps quiescent current under 3.5 µA in no-load standby conditions.

The device’s 3.7V to 42V input voltage range is suitable for high temperature applications such as down-hole drilling equipment with power sources ranging from 5V to 40V. The LT8610AX’s electrical parameters are 100% tested at 175°C, offering a VREF accuracy of 2% over the entire -40°C to 175°C temperature range.

42V, 3.5A-out buck regulator operates at 175°C ambient – [Link]