How to use MQ2 Gas Sensor – Arduino Tutorial


by codebender_cc @

The MQ series of gas sensors use a small heater inside with an electro-chemical sensor. They are sensitive for a range of gasses and are used indoors at room temperature. The output is an analog signal and can be read with an analog input of the Arduino.

The MQ-2 Gas Sensor module is useful for gas leakage detecting in home and industry. It can detect LPG, i-butane, propane, methane ,alcohol, hydrogen and smoke.

Some modules have a built-in variable resistor to adjust the sensitivity of the sensor.

How to use MQ2 Gas Sensor – Arduino Tutorial – [Link]

EEVblog #755 – Fluke PM2812 PSU Ebay Score

Dave checks out a Fluke/Philips PM2812 System DC Power supply he scored from ebay for 30 bucks.
Does it work?
Will the bunker hardware tin collection come through?

EEVblog #755 – Fluke PM2812 PSU Ebay Score – [Link]

WIFI plant monitoring system based on Arduino MEGA and ESP8266


by techrm @

Today we are going to show you our first experiment on the Internet of Things. For this purpose, we decided to use an Arduino MEGA instead of an Arduino UNO. That’s because Arduino MEGA has more than one serial port and this fact allows us to use the ESP8266 and the serial monitor at the same time. As written in the title, we’ll see how to monitor some of the most important plant growth factors*. These parameters are: Ambient temperature and humidity Soil moisture and temperature Illuminance

WIFI plant monitoring system based on Arduino MEGA and ESP8266 – [Link]

NRAM is the future



Nantero have announced that their innovative memory technology based on carbon nanotubes has been licensed and is in production in many fabrication facilities around the world. NRAM memory offers a significant speed advantage, (said to be hundreds of times faster than conventional NAND memory) and can be easily scaled to provide terabits of storage capacity which consume very little power.

Key Features of NRAM technology:

CMOS Compatible: Works in standard CMOS fabs with no new equipment needed

Limitless Scalability: Designed to scale below 5nm in the future

High-Endurance: Proven to operate for orders of magnitude more cycles than flash

Faster Read and Write: Same as DRAM, 100s of times faster than NAND

High Reliability: will retain memory for >1,000 years at 85 degrees Celsius or more than 10 years at 300 degrees Celsius

Low Power: Essentially zero in standby mode, 160x lower write energy per bit than NAND

Low Cost: Simple structure, can be 3D multi-layer and multi-level cell (MLC)

NRAM is the future – [Link]

iProtoXi Aistin: Multi-Modular Sensor Platform


Aistin is the product family for creative Internet-of-Things experiences, with Arduino conformance.

The Internet of Things has a different meaning for different people. For some, it means monitoring room temperatures from a mobile phone, whereas for other, it is controlling garden lighting from a laptop computer. For sports-minded people, it might mean logging their heart rate in real-time to a cloud service. Is there a common denominator between this wide range of different applications?

Our answer is Aistin. Instead of functionally limited ready-made IoT-sets, or flexible but unpractical self-wired desktop hassles, we wanted to inspire people to create new mobile products by providing the best that can be achieved with current technology:

iProtoXi Aistin: Multi-Modular Sensor Platform – [Link]

Arduino Thermometer With LM35


by PowerBot @

Hello, everyone !!! Today I’m going to show you how to make thermometer with Arduino and LM35 termperature sensor, builded on bread board and conected together with jumpers (bunch of cables :D).

Arduino Thermometer With LM35 – [Link]


Make a proper PCB exposer out of a cheap UV nail curing lamp


by alibenpuff @

What do PCB production and fake fingernails have in common? They both use UV light sources of high intensity and, as luck would have it, those light sources have exactly the same wavelength. Only the ones for PCB production are usually quite costly and the ones for fake fingernails are a bit more competitively priced.

This instructable is about how to use such a device to build a low cost light source, suitable for exposing the various UV sensitive materials encountered in printed circuit board production, like dry film photoresist and UV curable soldermask.

Make a proper PCB exposer out of a cheap UV nail curing lamp – [Link]

What is a zener diode?

A tutorial on zener diodes and how to use them as voltage clamps, voltage regulators, and how to create audio distortion circuits.

What is a zener diode? – [Link]

LT3088 – 800mA Single Resistor Rugged Linear Regulator



Most new voltage regulator chips are based on some variant of the digital switch-mode design which offers better efficiency compared with the more traditional linear regulator designs. Linear Technology has bucked the trend by introducing a new three-terminal linear regulator which offers some significant improvements on earlier designs.

The LT3088 has an input range from 1.2 V to 36 V with an extended safe operating area (SOA) compared to existing regulators, making it ideal for high input-to-output voltage and high output current applications where older regulators limit the output. The LT3088 uses a current source reference, allowing a single resistor to set the output voltage from 0 V to 34.5 V (with 1.2 V dropout). This regulator architecture, combined with low millivolt line and load regulation, enables multiple ICs to be paralleled easily for heat spreading and higher output current. The on-chip trimmed 50 µA current reference is ±1% accurate. The regulation, transient response and output noise (27 µVRMS) are independent of output voltage thanks to its voltage follower architecture.

LT3088 – 800mA Single Resistor Rugged Linear Regulator – [Link]

World’s First MEMS with Intelligent IMU


Fairchild, the leader of high-performance semiconductor solutions has launched its primary MEMS product line and the world’s first complete consumer 6D MEMS Inertial Measurement Unit (IMU), the FIS1100, with sensor fusion capable of defining system level orientation accuracy. The FIS1100 features a complete system solution for motion tracking, optimized 9D sensor fusion algorithm with in-use auto-calibration, and an AttitudeEngine motion processor for a superior user experience and longer battery life.

“The launch of Fairchild’s first MEMS product is a key milestone for the company as we take our unique design and manufacturing expertise and apply it towards system-level solutions that go beyond power,” said Fairchild Chairman & CEO Mark Thompson. “The advanced algorithms and deep applications knowhow from the Xsens acquisition position us well in enabling our customers to develop advanced motion solutions in diverse, quickly growing segments within markets such as consumer, industrial, and health.”

World’s First MEMS with Intelligent IMU – [Link]